10th week of 2009 patent applcation highlights part 41 |
Patent application number | Title | Published |
20090059990 | External Cavity semiconductor laser - An external cavity semiconductor laser is provided with a first input-output section | 2009-03-05 |
20090059991 | RE-ENTRANT STRUCTURE FOR THIN DISK RESONATORS - The present embodiment provides a system and method for lowering the saturated gain level of a thin-disk laser oscillator by multipassing each gain generator in such a way to cancel some of the wavefront error contributions from the disk surfaces. Wavefront aberrations introduced on one pass of the gain disk are canceled through symmetry on successive passes. The reduced wavefront error significantly improves design space for single-mode resonators. Maximum effectiveness is achieved by rotating the gain disk so that the fold plane-of-symmetry reverses the largest wavefront error or specifically chosen functional forms. | 2009-03-05 |
20090059992 | LIGHT SOURCE DEVICE, IMAGE DISPLAY DEVICE, AND MONITOR DEVICE - A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the state of the light selection areas so that wavelengths of the light beams selected respectively by the light selection areas become different from each other. | 2009-03-05 |
20090059993 | MONO-SLAB LASER CAVITY - A YAG/Nd:YAG block where an Nd:YAG block ends in a peak integrated inside a YAG block. The YAG block has reflective surfaces positioned at 45° to one another. The angled reflective surfaces serve as a “mirror” within the laser cavity to effectively increase the length of the cavity by a factor greater than 2. Fused to the output end of the laser cavity are a polarizer, an active/passive Q-switch, a one quarter waveplate and an output coupler. In operation, the laser cavity is pumped either from the side or the end of the cavity. The optical components of the present invention are bonded to form one optical ‘block’. All the components are prealigned during the crystal manufacturing process to form the optical laser cavity. The width of the cavity should be selected such that nearly all of the laser diode pump output is absorbed by the cavity. | 2009-03-05 |
20090059994 | Laser System for Medical and Cosmetic Applications - A laser system for medical and cosmetic applications has an optical delivery system for guiding a laser beam to a target surface, wherein the optical delivery system has an external optical element facing toward the target surface. A mechanical filter in the form of a protective screen for shielding the external optical element from particles ejected away from the target surface by the laser beam is arranged at an exit side of the external optical element. The protective screen has structural elements that delimit screen openings. The laser system has spacers that maintain a spacing of the protective screen relative to the target surface. | 2009-03-05 |
20090059995 | Method For Recording The Boiling Curve Of Liquids And Device For Carrying Out The Method - A method for recording the boiling curve of liquids, in particular petroleum products and/or solvents, in which a sample amount of the liquid to be analyzed is evaporated and subsequently condensed, wherein the vapor temperature and the respectively evaporated amount of liquid are monitored. The sample amount is dosed by a filling means, particularly a pump, wherein the filling means and the condensate collection chamber are brought to a defined, and preferably identical, temperature level. The condensed volume is determined volumetrically in a manner known per se and the distillation residue of the sample amount is determined by weighing. | 2009-03-05 |
20090059996 | Optical Fiber Temperature Distribution Measuring Apparatus, Method for Measuring Optical Fiber Temperature Distribution, and Optical Fiber Temperature Distribution Measuring System - An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value. | 2009-03-05 |
20090059997 | SEMICONDUCTOR TEMPERATURE SENSOR - Provided is a semiconductor temperature sensor having satisfactory linearity of an output voltage with respect to temperature. In a semiconductor temperature sensor ( | 2009-03-05 |
20090059998 | Multiple temperature resistance characteristic sensing cable and its sensor - A multiple temperature resistance characteristic sensing cable comprised of 1˜6 metal conductors with restorable insulation layer. Each cable contains different temperature resistance characteristic, and is wrapped by 1-2 layers of outer sheath. The metal conductors are wrapped by 1-2 insulation layers and twisted together. These twisted wires are inside the 1-2 layers of outer sheath. The temperature sensor comprises an interface unit, a sensing cable corresponding to temperature resistance characteristics, and a cable terminal unit. The interface unit comprises a signal amplifier and linear circuit, an A/D converter, a microprocessor, a display and operation circuit, a pulse output circuit, and a timer circuit. The temperature sensor realizes the differential temperature, fixed temperature or differential fixed temperature alarm among low, mid and high temperature sections. | 2009-03-05 |
20090059999 | SEMICONDUCTOR INTEGRATED CIRCUIT - A temperature detection circuit includes: a voltage generator that is connected to a first voltage line having first voltage and a second voltage line having second voltage and to output a third voltage to a third voltage line, the third voltage being obtained by transforming the first voltage to be stepped down as an ambient temperature becomes higher; and a detecting unit that includes: a delay section that is connected to the second voltage line and the third voltage line and to receive a pulse signal, the delay section being configured to output a delayed pulse signal that is obtained by delaying the pulse signal for a delay time set to be longer as the third voltage becomes lower; and a temperature detecting section that is configured to: receive the delayed pulse signal and the pulse signal; latch the delayed pulse signal based on the pulse signal; output the latched signal as a detection result. | 2009-03-05 |
20090060000 | Acquisition of spreading factors (SFS) of multiple transmitted signals in code division multiple access system - A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated based on its signal strength and SF upon acquisition of the SF. This SF may be monitored such that the Interferer weight may be adjusted when the SF changes based on the detected changes. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal. | 2009-03-05 |
20090060001 | COGNITIVE FREQUENCY HOPPING RADIO - A cognitive frequency hopping radio includes a cognitive engine to actively monitor frequency spectrum to adapt transmission characteristics of the cognitive radio to communicate with other devices operating in the network. A frequency hopping block controls the transmitter to transmit radio signals by switching a carrier among many frequency channels using a pseudo-random sequence. The cognitive frequency hopping radio uses the short dwell times to essentially prevent harmful interference to incorrectly identify vacant channels. | 2009-03-05 |
20090060002 | ADAPTIVE BANDWIDTH, MULTI-CHANNEL DIGITAL MODULATION - A wireless product for wireless communication is constructed for spread spectrum operation within a required channel bandwidth where an RF signal for transmission in the channel is divided into sub-channels, each of which is less than the minimum channel bandwidth permitted by FCC regulations in order to realize improved transmission characteristics and greater flexibility in transmission timing and synchronization. The wireless product includes a controller for controlling system operation. During operation, the RF signal portion is less than the minimum channel bandwidth required by said regulations thus dividing the channel bandwidth to form N sub-channels, and setting the bandwidth of the RF signal to be substantially equal to the sub-channel bandwidth. The RF signal portion being transmitted in each of the N sub-channels. | 2009-03-05 |
20090060003 | CELLULAR COMMUNICATION SYSTEM AND A METHOD OF OPERATION THEREFOR - A cellular communication system employs a plurality of bandwidths. The cellular communication system comprises a plurality of base stations ( | 2009-03-05 |
20090060004 | SEQUENCE HOPPING IN SC-FDMA COMMUNICATION SYSTEMS - A method and apparatus are provided for the selection of sequences used for the transmission of signals from user equipments in a cellular communication system. The sequences can be selected either through planning or through pseudo-random hopping among a set of sequences. With planning, the serving Node B signals the sequence assignment for each cell, which remains invariable in time. With pseudo-random sequence hopping, which has the same pattern in all cells, the serving Node B signals the initial sequence, from a set of sequences, which can be different among cells. The signals can be transmitted either through a data channel or through a control channel. The initial sequence used in the control (or data) channel is signaled by the serving Node B. The initial sequence used in the data (or control) channel is selected to be the sequence in a set of sequences with number equal to a shift value relative to the first sequence as signaled by the serving Node B for the control (or data) channel. | 2009-03-05 |
20090060005 | Method for using a non-orthogonal pilot signal with data channel interference cancellation - A system and method for encoding/decoding data channels in a CDMA system having data channel interference cancellation, wherein data channel interference cancellation is used to remove unwanted non-orthogonal pilot signal components which are present within a demodulated data signal. This is accomplished by regenerating interference terms with respect to the non-orthogonal pilot signal and subtracting them from the demodulated data signal. | 2009-03-05 |
20090060006 | RECEIVER DETECTING SIGNALS BASED ON SPECTRUM CHARACTERISTIC AND DETECTING METHOD THEREOF - A receiver for receiving a target signal complying with a specific communication specification comprising a specific spectrum characteristic includes a detecting module for detecting a packet of an input signal, a transforming unit for transforming the packet from a time domain to a frequency domain to derive a spectrum characteristic of the input signal, and a determining unit for determining whether the input signal is the target signal according to the spectrum characteristic of the input signal. Therefore, the proposed receiver is able to reduce packet miss rate and false alarm rate while robust to a severe channel condition, and achieve fast and accurate signal quality detection. | 2009-03-05 |
20090060007 | Fast joint detection base station - A code division multiple access base station receives K data signals over a shared spectrum. The base station receives and samples a combined signal having the K transmitted data signals. A combined channel response matrix is produced. A block column of a cross correlation matrix is determined using the combined channel response matrix. Each block entry of the block column is a K by K matrix. Each block entry of the block column is a K by K matrix. A fourier transform of a complex conjugate transpose of the combined channel response matrix multiplied to the combined signal samples is taken. An inverse of a fourier transform of each block entry is multiplied to a result of the fourier transform to produce a fourier transform of the data vector. An inverse fourier transform of the data vector fourier transform is taken to produce data of the K signals. | 2009-03-05 |
20090060008 | SYSTEM AND METHOD FOR BLIND SOURCE SEPARATION OF SIGNALS USING NOISE ESTIMATOR - An array has N | 2009-03-05 |
20090060009 | AGGREGATE DATA FRAME GENERATION - In an example embodiment, an aggregate frame, such as a A-MSDU aggregate is generated from interleaved frames addressed to various receiver addresses. The incoming frames are regrouped by receiver address. The aggregate frame is generated from the regrouped frames. | 2009-03-05 |
20090060010 | DIFFERENTIAL CHANNEL QUALITY REPORTING - Various example embodiments are disclosed herein. According to one example embodiment, a method may include obtaining a first channel quality measurement for a wireless node such as a mobile station or relay station in a wireless network. The method may further include sending, from the wireless node, a full channel quality indicator (CQI) to a base station based on the first channel quality measurement. The method may further include obtaining a second channel quality measurement for the wireless node. The method may further include sending a differential CQI to the base station based on comparing the second channel quality measurement to the first channel quality measurement. The differential CQI may occupy less channel resources than the full CQI. | 2009-03-05 |
20090060011 | REUSE OF DIGITAL INTERFACE FOR MULTIPLE COMPONENTS - In one embodiment, a circuit can selectively adjust a current for driving a load. The circuit includes a sensor configured to measure a magnetic field associated with the current and provide a sensor voltage representative thereof. A control circuit is configured to selectively adjust the current as a function of the sensor voltage and a time-varying voltage threshold. Other methods and systems are also disclosed. | 2009-03-05 |
20090060012 | SYSTEM FOR TRANSMITTING INFORMATION DATA FROM A TRANSMITTER TO A RECEIVER OVER A NESTED BLOCK CHANNEL - The present invention concerns a system for transmitting information data from a transmitter to a receiver over nested block channel, the transmitter (TRD) comprising an encoder (ENC) following an error correcting code structure, the receiver (RCV) comprising a decoder (DEC) defined according to the error correcting code structure, the nested block channel (NBCH) comprising a scaled BPSK binary modulator (BM), the amplitude of which may vary from one bit transmission to the other. Such system is characterized in that the coding rate (Rc) of the encoder (ENC) or the parameters (D,L) of the nested block channel (NBCH) are selected dependently one from each other to achieve a target diversity order of the system and to maximize the coding gain. | 2009-03-05 |
20090060013 | OPTIMIZING PRECODER SETTINGS USING AVERAGE SINR REPORTS FOR GROUPS OF TONES - Techniques are disclosed for compensating for crosstalk using adaptation of data signals transmitted over respective channels of a communication network. In one example, a method comprises the following steps. Data is transmitted to a communication network device via a communication line during a sequence of periods. For each period of the sequence of periods, a separate value of a measure of crosstalk that was measured at the communication network device is received, each value being an average of measurements at the device of measures of crosstalk for a plurality of communication network signal subcarriers. For each individual signal subcarrier of the plurality, a matrix is updated based on the received values, the matrix being configured to precode data transmissions to the communication network device over the individual signal subcarrier. The communication network may be a DSL system, the signal subcarriers may be DSL tones, and the measure of crosstalk may be a SINR value. | 2009-03-05 |
20090060014 | SYSTEM AND METHOD FOR AUTOMATED LINK QUALITY MEASUREMENT FOR ADAPTIVE MODULATION SYSTEMS USING NOISE LEVEL ESTIMATES - A communications system includes a transmitter that transmits a modulated signal having encoded communications data over a communications channel. The transmitter adjusts one of at least modulation and coding at the transmitter based on the received channel state information of the transmitted signal. A receiver determines received signal metrics from the modulated signal. A noise power estimator estimates the noise power of the received communications signal by collecting N data samples from the communications signals, forming a covariance matrix of the N data samples based on a model order estimate, computing the eigenvalue decomposition of the covariance matrix and ranking resultant eigenvalues from the minimum to the maximum for determining the noise power of the received signal. At least one of modulation and coding are adjusted based on the monitored link quality of the communications channel to enhance use of the available channel capacity. | 2009-03-05 |
20090060015 | SYSTEM AND METHOD FOR ESTIMATING NOISE POWER LEVEL IN A MULTI-SIGNAL COMMUNICATIONS CHANNEL - A system estimates noise power in a scalar, multi-signal communications channel. A data sampler collects N data samples from communications signals received from the communications channel. A module forms a covariance matrix of the N data samples based on a model order estimate. A module also computes the eigenvalue decomposition of the covariance matrix and ranks resultant eigenvalues from the minimum to the maximum for determining the noise power. | 2009-03-05 |
20090060016 | METHOD OF ESTIMATING INTER-CARRIER INTERFERENCE (ICI) AND ICI MITIGATING EQUALIZER - An inter-carrier interference (ICI) mitigating equalizer includes a channel estimator, a channel calculator, an ICI estimator, a subtracter, and an equalizer. The channel estimator estimates a channel response from a received signal, and the channel calculator calculates a basic component of a channel response and fluctuating components of the channel response from the estimated channel response. The ICI estimator multiplies the fluctuating components of the channel response by a received signal in a frequency domain, filters the multiplication results according to filter coefficients, and estimates an ICI component included in the received signal based on the filtering results. The subtracter subtracts the ICI component from the received signal in the frequency domain. The equalizer equalizes an output signal of the subtracter based on the basic component of the channel response. | 2009-03-05 |
20090060017 | Selectable-Tap Equalizer - A signaling circuit having a selectable-tap equalizer. The signaling circuit includes a buffer, a select circuit and an equalizing circuit. The buffer is used to store a plurality of data values that correspond to data signals transmitted on a signaling path during a first time interval. The select circuit is coupled to the buffer to select a subset of data values from the plurality of data values according to a select value. The equalizing circuit is coupled to receive the subset of data values from the select circuit and is adapted to adjust, according to the subset of data values, a signal level that corresponds to a data signal transmitted on the signaling path during a second time interval. | 2009-03-05 |
20090060018 | Transmit Equalizer For Dispersive Channels - An equalizer at the transmitter reduces data-dependent jitter introduced by a non-linear device in the transmitter. In one implementation, the equalizer is T/2-spaced. In an alternate implementation, it is T-spaced. | 2009-03-05 |
20090060019 | EQUALIZER SYSTEM AND FILTERING METHOD - An equalizer system comprises a gain adjuster and a filter system. The gain adjuster provides a plurality of gain settings. The filter system is coupled to the gain adjuster and filters an input signal to output a filtered signal in response to the gain settings. The filter system comprises at least one high shelving filter with a first transfer function and at least one low shelving filter with a second transfer function. The reciprocal of the first transfer function is equal to the second transfer function. | 2009-03-05 |
20090060020 | METHOD AND APPARATUS FOR ESTIMATING AND CORRECTING BASEBAND FREQUENCY ERROR IN A RECEIVER - A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights. | 2009-03-05 |
20090060021 | MULTI-TAP DECISION FEEDBACK EQUALIZER (DFE) ARCHITECTURE ELIMINATING CRITICAL TIMING PATH FOR HIGHER-SPEED OPERATION - A decision feedback equalizer (DFE) and method include summer circuits to add a dynamic feedback signal representing a dynamic feedback tap to a received input and to speculate on a speculative tap. Data slicers are configured to receive outputs of the summer circuits and sample the outputs of the summer circuits. First multiplexers are included, each of which is configured to receive a first input from a corresponding data slicer. Second multiplexers are included, each of which is configured to receive an output of a plurality of the first multiplexers. The second multiplexers have an output fed back to a second input of the first multiplexers, and the second multiplexer output is employed to provide a select signal for a second multiplexer on a different section of the DFE and to drive the dynamic feedback signal to a summer circuit on a same section of the DFE. | 2009-03-05 |
20090060022 | System and method for equalizing an incoming signal - An equalizer is provided, comprising: a feedback combiner to combine an input signal and a feedback signal to produce a first signal; a delay line to delay the first signal to produce a second signal; a feed-forward combiner to combine the second signal and a feed-forward signal to produce an output signal; an interim decision circuit to extract a sign bit from the first signal; N feedback scaling elements to generate N scaled feedback signals; M feed-forward scaling elements to generate M scaled feed forward signals; a feedback circuit to pass the N scaled feedback signals through feedback delay elements and feedback summing elements to generate the feedback signal in response to the sign bit; and a feed forward circuit to pass the M scaled feed forward signals through feed-forward delay elements and feed-forward summing elements to generate the feed-forward signal in response to the sign bit. | 2009-03-05 |
20090060023 | TRANSMISSION CIRCUIT, CMOS SEMICONDUCTOR DEVICE, AND DESIGN METHOD THEREOF - A transmission circuit, which transmits a differential signal having pulse time larger than a predetermined minimum pulse time, includes: a driving unit for feeding the differential signal as a potential difference between two transmission lines; a driven unit for operating on the basis of the differential signal by receiving the differential signal by the potential difference between the two transmission lines; and a connecting resistor for electrically connecting the two transmission lines. Further, a connecting MOS transistor may be provided near a receiving end of the driven unit. | 2009-03-05 |
20090060024 | METHOD AND APPARATUS FOR ENCODING/DECODING MEDIA SIGNAL - A method and apparatus for encoding/decoding a media signal. The method of decoding a media signal includes extracting first table index information from a header. The first table index information indicates M (M2009-03-05 | |
20090060025 | DIGITAL BROADCASTING TRANSMITTER, TURBO STREAM PROCESSING METHOD THEREOF, AND DIGITAL BROADCASTING SYSTEM HAVING THE SAME - A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency. | 2009-03-05 |
20090060026 | ENHANCED PRESENTATION OF SUB-PICTURE INFORMATION - A system is provided for processing video images for display. In one example, the system comprises a stream parser for retrieving a compressed main video data and a sub-picture identifier. A video decoder generates a main video image having a main video intensity value for each pixel in the main video. A sub-picture decoder determines a sub-picture image based on the sub-picture identifier. The sub-picture image includes a pixel data for each pixel in the sub-picture image indicative of a sub-picture pixel type including a background pixel type and a pattern pixel type. Each pixel includes a command code indicative of a background contrast level, a pattern contrast level, a background color level and a pattern color level. An intensity formatter generates a sub-picture pixel intensity for each pixel in the sub-picture image. A preprocessing function calculates, for each sub-picture pixel, a sub-picture pixel intensity by alpha-blending the sub-picture pixel with no main video pixel when the background color intensity is greater than the pattern color intensity. A filtering function performs anti-aliasing filtering on the sub-picture image. A sub-picture alpha-blending function combines the sub-picture image with the main video image using alpha-blending. | 2009-03-05 |
20090060027 | Compressed Signal Subjective Quality Ratings Prediction - A no-reference subjective quality ratings predictor for a lossy compressed signal decodes the lossy compressed signal to produce a decompressed signal, and extracts from the lossy compressed signal error bounding parameters and information data. An error estimation generator converts the error bounding parameters to sensitivity test data which is combined with lossy data from an inverse compression module within the decoder to produce data with bounded errors. The data with bounded errors is converted into a sensitivity decompressed signal. The decompressed and sensitivity decompressed signals are processed by a full-reference subjective quality rating predictor to produce the subjective quality ratings for the lossy compressed signal. The information data and decompressed signal may also be input to the error estimation generator to generate the sensitivity test data in conjunction with the error bounding parameters. | 2009-03-05 |
20090060028 | SYSTEM AND METHOD OF DELIVERING VIDEO CONTENT - A method to deliver video content is disclosed and includes sending a bandwidth change request from a set-top box device associated with a home network to a server via an Internet Protocol Television (IPTV) access network. The bandwidth change request includes a requested bandwidth change event and an upper limit overhead bandwidth factor. The method also includes receiving video packets related to the bandwidth change event from the server at an increased rate corresponding to the upper limit overhead bandwidth factor. | 2009-03-05 |
20090060029 | Method and Apparatus for Encoding/Decoding - The present invention relates to a multimedia data encoding/decoding method and apparatus. The encoding method includes generating a file type area having information on a file format; generating a data area comprising a plurality of media data areas; and generating a media in | 2009-03-05 |
20090060030 | DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM - A digital broadcasting system and a data processing method are disclosed. A receiving system of the digital broadcasting system includes a receiving unit, an SI handler, and a decoding unit. The receiving unit receives broadcast signals including mobile service data and main service data. Herein, the mobile service data may configure a data group, and the data group may include a signaling information region in some of a plurality of data regions. Also, the signaling information region may include TPC signaling data and FIC signaling data. The SI handler acquires channel configuration information of the mobile service data from the broadcast signal using pre-decided IP access information, and extracts encoding format information for each IP stream component within a corresponding virtual channel service RTP-packetized and received from the acquired channel configuration information. The decoding unit decodes the mobile service data of the corresponding IP stream component based upon the extracted encoding format information. | 2009-03-05 |
20090060031 | OPTO-ELECTRONIC VIDEO COMPRESSION SYSTEM - An opto-electonic video compression system is disclosed including a lens element for transmitting light of an image and having one or more lenses, each lens having a predetermined focal length. A sensor array includes a first sensor for receiving focused light from the lens element and a second for receiving defocused light from the lens element, wherein the first sensor includes X.times.Y pixels and samples the focused light at each of the X.times.Y pixels, and the second sensor includes X/2.times.Y/2 pixels and samples the defocused light at each of the X/2.times.Y/2 pixels. An electronic differencing element in communication with the first and second sensor is also included for differencing the coefficients of co-located pixels. | 2009-03-05 |
20090060032 | Software Video Transcoder with GPU Acceleration - Embodiments of the invention as described herein provide a solution to the problems of conventional methods as stated above. In the following description, various examples are given for illustration, but none are intended to be limiting. Embodiments are directed to a transcoding system that shares the workload of video transcoding through the use of multiple central processing unit (CPU) cores and/or one or more graphical processing units (GPU), including the use of two components within the GPU: a dedicated hardcoded or programmable video decoder for the decode step and compute shaders for scaling and encoding. The system combines usage of an industry standard Microsoft DXVA method for using the GPU to accelerate video decode with a GPU encoding scheme, along with an intermediate step of scaling the video. | 2009-03-05 |
20090060033 | PREDICTIVE ADAPTIVE CODING AND MODULATION - Methods, systems, and devices are described for providing predictive adaptive communications. Embodiments include a network access unit, in communication with multiple data terminals, and adapted to determine geospatial and other network data (e.g., current capability and position information relating to a designated one of the data terminals, map data, etc.), and to generate a link condition prediction as a function of the network data. The network access unit may then adaptively encode source data (e.g., using adaptive coding and modulation of hierarchically pre-coded data) to preempt impacts of changing link conditions on communications with the designated data terminal as a function of the link condition prediction. | 2009-03-05 |
20090060034 | Method and apparatus for scalably encoding and decoding video signal - In one embodiment, the method includes predicting at least a portion of a current image in a current layer based on at least a residual coded portion of a base image in a base layer, a reference image, shift information for samples in the predicted current image, and offset information indicating a position offset between at least one boundary pixel of the reference image and at least one boundary pixel of the current image. The residual coded portion represents difference pixel data. | 2009-03-05 |
20090060035 | TEMPORAL SCALABILITY FOR LOW DELAY SCALABLE VIDEO CODING - A method of processing video information which includes receiving encoded video information including an encoded base layer frame and encoded enhanced layer frames for providing temporal scalability, decoding the encoded video information in display order, and using a decoded first enhanced layer frame as a reference frame for decoding a second enhanced layer frame for forward prediction. Processing the video information in display order and using a decoded enhanced layer frame as a reference frame for processing another enhanced layer frame for forward prediction reduces coding latency for achieving temporal scalability for low delay scalable video coding. The coding memory space may also be reduced as compared to bidirectional prediction coding since the number of reference frames used for coding may be reduced. | 2009-03-05 |
20090060036 | Coding Apparatus, Coding Method, Decoding Apparatus, and Decoding Method - A coding apparatus includes: a storage section that stores information for coding an image area to be currently coded in a direct prediction mode that predicts motion information of an image area to be coded by referring to motion information of a previously coded image area; a deriving section that derives motion information of the image area in the direct prediction mode by referring to the information stored in the storage section; a selecting section that selects a prediction mode for coding the image area to be coded, in accordance with the motion information derived by the deriving section; and a determining section that determines information necessary for the deriving section to derive motion information of an uncoded image area, from coding information applied in the prediction mode selected by the selecting section to the image area to be coded, and stores only information determined necessary into the storage section. | 2009-03-05 |
20090060037 | METHOD AND SYSTEM FOR DETERMINING PREDICTION MODE PARAMETER - For determining a prediction mode parameter, a macroblock of an image is divided into a plurality of blocks; most prediction mode parameters corresponding to a plurality of first blocks along a left most edge of the macroblock are determined; most prediction mode parameters corresponding to a plurality of second blocks along a top most edge of the macroblock are determined; and the most prediction mode parameters of the first and second blocks are stored into a buffer allocated with designated position for the plurality of blocks. | 2009-03-05 |
20090060038 | Encoding device and encoding method and decoding device and decoding method - An encoding device including a calculation result storage unit adapted to store information based on a result of a difference calculation of the differential encoding along with information on a referenced picture used for the differential calculation a determination unit determining from the information on the referenced picture stored in the calculation result storage unit whether the difference calculation has been performed on the picture to be referred used for the difference calculation of a picture which undergoes the image compression, as a reference target of the difference calculation and a differential encoding unit reading from the calculation result storage unit the information on the result of the difference calculation corresponding to the picture to be referred and performs the differential encoding based on a determination by the determination unit that the difference calculation has been performed, as the reference target, on the picture to be referred. | 2009-03-05 |
20090060039 | METHOD AND APPARATUS FOR COMPRESSION-ENCODING MOVING IMAGE - Encoding processes are performed in their respective encoding modes until their respective quantized DCT (discrete cosine transform) coefficients are generated. Based on information about code amounts generated in the encoding modes, an encoding mode that provides a smallest code amount is determined. DCT coefficients corresponding to the determined encoding mode are subjected to variable-length encoding. | 2009-03-05 |
20090060040 | Method and Apparatus for Decoding/Encoding a Video Signal - A method of decoding a current layer using inter-layer prediction is disclosed. The present invention includes obtaining a first flag information indicating whether a current block of the current layer is coded using the inter-layer prediction, obtaining a quality identification information identifying a quality of the current block, obtaining an information for controlling a characteristic of a deblocking filter based on the first flag information and the quality identification information, and executing deblocking filtering using the information for controlling the characteristic of the deblocking filter. | 2009-03-05 |
20090060041 | SYSTEM AND METHOD FOR MOTION VECTOR COLLECTION FOR MOTION COMPENSATED INTERPOLATION OF DIGITAL VIDEO - A system and method of collection motion vectors for motion compensated interpolation of digital video are disclosed. For example, one embodiment includes a method of identifying motion vectors for interpolating a portion of a digital video signal. The method comprises identifying a plurality of motion vectors indicative of differences between first and second frames of a digital video signal and projecting each of the motion vectors to a location within a third frame at a time associated with the third frame. The method further includes determining a measure of overlap of each projected location with a portion of a third frame to be interpolated, selecting at least one motion vector based on the measure, and generating at least a portion of a third frame based on the selected at least one motion vector selected. Other embodiments include a system and device configured to perform the method. | 2009-03-05 |
20090060042 | SYSTEM AND METHOD FOR MOTION VECTOR COLLECTION BASED ON K-MEANS CLUSTERING FOR MOTION COMPENSATED INTERPOLATION OF DIGITAL VIDEO - A system and method of collection motion vectors for motion compensated interpolation of digital video are disclosed. For example, one embodiment includes a method of identifying motion vectors for interpolating a portion of a digital video signal. The method comprises identifying a plurality of motion vectors indicative of differences between first and second frames of a digital video signal, assigning each of the plurality of motion vectors to one of a plurality of clusters, selecting at least one motion vector assigned to each of the plurality of clusters, and generating at least a portion of a third frame based on the at least one motion vector selected for each of the plurality of clusters. Other embodiments include a system and device configured to perform the method. | 2009-03-05 |
20090060043 | MULTIVIEWER BASED ON MERGING OF OUTPUT STREAMS OF SPATIO SCALABLE CODECS IN A COMPRESSED DOMAIN - A viewer system, components and method that are operable to efficiently merge data streams prior to decoding them, and then transmit the merged data stream for decoding and displaying. Unlike prior art multiple encoded image viewing solutions, the present system and method enables the use of significantly less bandwidth and less resources for decoding the data stream to provide a more efficient viewer system. | 2009-03-05 |
20090060044 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - The present invention provides a method of processing data in digital broadcasting system. The method includes receiving a broadcast signal including mobile broadcast service data and main broadcast service data, wherein the mobile broadcast service data configures a data group, wherein the data group is divided into a plurality of regions, wherein N number of known data sequences are inserted in some regions among the plurality of regions, and wherein a transmission parameter is inserted between a first known data sequence and a second known data sequence, among the N number of known data sequences, detecting the transmission parameter from the mobile broadcast service data, controlling power based upon the detected transmission parameter, thereby receiving a data group including requested mobile broadcast service data, extracting video data from the mobile broadcast service data and decoding the extracted video data, the decoding step comprising performing overlap smoothing on the video data and performing loop filtering on the overlap-smoothed video data. | 2009-03-05 |
20090060045 | MOVING PICTURE ENCODING APPARATUS AND MOVING PICTURE ENCODING METHOD - According to one embodiment, a reference macroblock determination module determines, with respect to each of the peripheral macroblocks corresponding to the to-be-encoded macroblock, whether the macroblock is an encoded macroblock or not, determines, if the macroblock is the encoded macroblock, the macroblock as a reference macroblock which is to be used in order to determine a prediction mode candidate of the to-be-encoded macroblock, and to determine, if the macroblock is a non-encoded macroblock, an encoded macroblock, which is present in an encoded picture immediately preceding the to-be-encoded picture and which is present at the same spatial position as the macroblock, as the reference macroblock. A reference macroblock with a lowest cost is selected from these reference macroblocks, and the same prediction mode as the prediction mode of the selected reference macroblock is determined as a prediction mode candidate. | 2009-03-05 |
20090060046 | Method and apparatus for improving the quality of a transmitted video signal - A feedback circuit for restoration of DC reference levels in video signals is presented. In one or more embodiments, a DC sample pulse is generated representing the back porch of an incoming video signal. A sample and hold circuit, which is controlled by the DC sample pulse, obtains the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through an integrating node in front of the circuit causing an amplifier to compensate for the signal offset thereby restoring the video signal to its proper DC voltage level with respect to ground. | 2009-03-05 |
20090060047 | Data compression using an arbitrary-sized dictionary - A data compression method improves Lempel-Ziv (“LZ”) compression by encoding the offsets produced during LZ compression as variable-bit-length (“VBL”) encoded integers, and outputting the VBL integers as part of the compressed data. Other integers produced during LZ compression, as well as integers produced by other data compression algorithms, can also be encoded using a VBL scheme. | 2009-03-05 |
20090060048 | MOTION DETECTION CIRCUIT AND METHOD - A motion detection circuit calculates and updates a first Sum of Absolute Differences (SAD) between a reference macroblock stored in a reference macroblock buffer and a coding macroblock stored in a first coding macroblock buffer and calculates and updates a second SAD between a reference macroblock stored in the reference macroblock buffer and a coding macroblock stored in the second coding macroblock buffer. The motion detection circuit detects a reference macroblock, corresponding to the smallest of the updated first and second SAD values of each coding macroblock, as a predictive macroblock corresponding to the coding macroblock. | 2009-03-05 |
20090060049 | METHOD AND SYSTEM FOR CALCULATING FLAG PARAMETER OF IMAGE BLOCK - A flag parameter in a digital image decoding is calculated. For a macroblock consisting of M×N blocks, a first operation is performed on M block along a first edge to obtain M first parameters, and a second operation is performed on N blocks along a second edge to obtain N second parameters. The first and second parameters are stored into corresponding locations in a first and a second buffer array. Then a flag parameter corresponding to a given block is calculated according to corresponding values stored in the first and second buffer arrays. Calculation for all of the M×N blocks is performed in the order that neighboring left and upper blocks next to the give block is processed prior to the given block. | 2009-03-05 |
20090060050 | Method for encoding and decoding video signal - Disclosed is a method for encoding a decoding a video signal. In the procedure of encoding the video signal, when a frame temporarily simultaneous with a frame including a macro block of an enhanced layer which will obtain a prediction video does not exist in a base layer, the macro block is encoded based on difference values of residual data using corresponding residual blocks in a past frame and a future frame of the base layer which are residual data corresponding to image difference values and using a residual block for the macro block of the enhanced layer. In another embodiment, the macro block is encoded based on difference values of residual data using corresponding residual blocks in a past frame and a future frame of the enhanced layer and the residual block for the macro block. Accordingly, a residual prediction mode is applied for a macro block of an enhanced layer even if a frame temporally simultaneous with a frame of the enhanced layer does not exist in a base layer, thereby improve coding efficiency. | 2009-03-05 |
20090060051 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data. | 2009-03-05 |
20090060052 | MULTI-TRANSPORT STREAM (TS) GENERATING APPARATUS AND METHOD, AND DIGITAL BROADCASTING TRANSMISSION AND RECEPTION APPARATUSES AND METHODS - A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily. | 2009-03-05 |
20090060053 | MULTI-TRANSPORT STREAM (TS) GENERATING APPARATUS AND METHOD, AND DIGITAL BROADCASTING TRANSMISSION AND RECEPTION APPARATUSES AND METHODS - A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily. | 2009-03-05 |
20090060054 | DIGITAL BROADCASTING TRANSMITTER, TURBO STREAM PROCESSING METHOD THEREOF, AND DIGITAL BROADCASTING SYSTEM HAVING THE SAME - A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency. | 2009-03-05 |
20090060055 | METHOD AND APPARATUS FOR ENCODING METADATA INTO A DIGITAL PROGRAM STREAM - A method and apparatus for encoding data into a digital program stream includes receiving a digital program stream having a pre-allocated data channel, where the pre-allocated data channel has a pre-defined bandwidth. In one embodiment, metadata may be received and an unused portion of the pre-defined bandwidth of the pre-allocated channel may be determined. In another embodiment, metadata may be encoded into the unused portion of the pre-defined bandwidth. | 2009-03-05 |
20090060056 | METHOD AND APPARATUS FOR CONCEALING ERRORS IN A VIDEO DECODING PROCESS - A method for concealing errors in a video decoding process according to the invention, wherein said method comprises the steps of: receiving a frame of video picture comprising an comprising an error-existing picture area and a neighboring picture area; searching a similar picture area to said neighboring picture area according to a predetermined condition in a frame of reference picture of said video picture; concealing said existing errors by using the information in said video picture if said similar picture area is not found, or concealing said existing errors by using the information in said reference picture if said similar picture area is found. | 2009-03-05 |
20090060057 | MULTI-TRANSPORT STREAM (TS) GENERATING APPARATUS AND METHOD, AND DIGITAL BROADCASTING TRANSMISSION AND RECEPTION APPARATUSES AND METHODS - A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily. | 2009-03-05 |
20090060058 | MULTI-TRANSPORT STREAM (TS) GENERATING APPARATUS AND METHOD, AND DIGITAL BROADCASTING TRANSMISSION AND RECEPTION APPARATUSES AND METHODS - A multi-transport stream (TS) generating apparatus and method, and digital broadcasting transmission and reception apparatuses and method are provided. The multi-TS generating apparatus includes an adaptor to generate an adaptation field in some packets of a normal stream; an interleaver to interleave the normal stream; a turbo processor to turbo-code a plurality of turbo streams; a stuffer to generate a multi-TS by stuffing the plurality of the turbo streams into the adaptation field; and a deinterleaver to deinterleave the multi-TS. Accordingly, the plurality of the turbo streams can be transmitted far more easily. | 2009-03-05 |
20090060059 | ENCODED STREAM TRANSMITTER - The accuracy of time information set in a packet is improved. Time information calculator | 2009-03-05 |
20090060060 | METHOD FOR TRANSMITTING A SIGNAL FROM A TRANSMITTER TO A RECEIVER IN A POWER LINE COMMUNICATION NETWORK, TRANSMITTER, RECEIVER, POWER LINE COMMUNICATION MODEM AND POWER LINE COMMUNICATION SYSTEM - A method for transmitting a signal from a transmitter over a channel to a receiver on a Power Line Network, wherein said signal is OFDM-modulated on a set of sub-carriers, is proposed, wherein an OFDM tonemap and an eigenbeamforming encoding matrix are determined based on a channel estimation for each sub-carrier, a tonemap feedback signal and an eigenbeamforming feedback signal are generated, which are descriptive of said OFDM tonemap and said eigenbeamforming encoding matrix, respectively, and transmitted to the transmitter. A corresponding receiver, a transmitter, a power line communication and a power line communication system are described as well. | 2009-03-05 |
20090060061 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT - A communication apparatus is connected to a transmission channel for transmitting data to another communication apparatus. The communication apparatus includes: a communication frame generator which generates a communication frame for storing the data; and a controller which controls to insert a pilot symbol into the communication frame based on a state of the transmission channel. | 2009-03-05 |
20090060062 | Induction Neutralizing Transformer - An induction neutralizing transformer is provided. The induction neutralizing transformer includes a core and a coil wrapped around the core. The coil has a length between approximately 100 feet and approximately 200 feet and includes a plurality of twisted wire pairs. The induction neutralizing transformer does not include a screen or shield to prevent crosstalk interference. | 2009-03-05 |
20090060063 | Method and Apparatus for Robust Control Signaling Distribution in OFDM Systems - Orthogonal Frequency Division Multiplex (OFDM) systems distribute some number of pilot subcarriers within the larger set of subcarriers comprising an OFDM signal. In that context, according to teachings presented herein, control signaling is sent on subcarriers selected for their proximity to pilot subcarriers. Correspondingly, an OFDM receiver is configured to receive an OFDM signal having a control signaling subcarrier positioned proximate in a frequency-time plane to a pilot subcarrier, and generate a scalar-valued channel estimate for demodulating symbols from the control signaling subcarrier based on observations limited to the proximate pilot subcarrier. Channel estimation with respect to the control signaling subcarriers thus is robust, yet simplified. The method may be applied to all control signaling, or selectively applied to higher-priority control signaling, such as paging. | 2009-03-05 |
20090060064 | OFDM Communication System, Method for Generating Feedback Information Thereof, and Communication Apparatus - An OFDM communication system which performs appropriate feedback flexibly adapted to channel states, while suppressing an amount of feedback information. The OFDM communication system has first and second communication apparatuses. In a second receiver of the second communication apparatus, a channel quality measurement part measures channel quality for each of sub-carriers. A time variation measurement part and a frequency measurement part respectively measure variation of channel quality in a time domain and a frequency domain, respectively, and output the variation of channel quality as time variation information and frequency variation information, also respectively. Based on the measured time variation information and frequency variation information, a two-dimensional control part performs two-dimensional blocking for forming two-dimensional blocks each from plural adjacent sub-carriers which are adjacent to each other in the time domain and the frequency domain. The two-dimensional control part measures and outputs channel quality of each two-dimensional block, as feedback information. | 2009-03-05 |
20090060065 | Communication system and method for receiving high priority and low priority signals - A communication system and method of communicating signals to a plurality of different types of receivers is provided. At least one transmitter transmits hierarchically modulated high priority and low priority signals as a single frequency network. At least one satellite re-transmits the high priority signal in a first circularly polarized direction and the low priority signal in a second circularly polarized direction. At least one of a first receiver having a single antenna is configured to receive the high priority signal in the first circularly polarized direction and switched to receive the low priority signal in the second circularly polarized direction, and a second receiver having a first antenna is configured to receive the high priority signal in the first circularly polarized direction, and a second antenna is configured to receive the low priority signal in the second circularly polarized direction substantially simultaneously. | 2009-03-05 |
20090060066 | Communication system and method for transmitting signals to a plurality of different types of receivers - A communication system and method of communicating signals to a plurality of different types of receivers is provided. The communication system includes at least one transmitter that transmits high priority and low priority signals as a single frequency network. At least one satellite receives and re-transmits at least one of the high priority and low priority signals. At least one terrestrial repeater is in communication with the at least one transmitter, and receives from the at least one transmitter and re-transmits at least one of the high priority and low priority signals. A plurality of receivers includes at least a first receiver configured to process the high priority signal to emit an output signal based upon the high priority signal, and a second receiver configured to process the high priority and low priority signals to emit an output signal based upon the high priority and low priority signals. | 2009-03-05 |
20090060067 | Determining channel matrices by correlated transmissions to different channels - A method involves performing a plurality of acts. The acts include transmitting a first signal stream to a first channel of a multi-channel communications medium while transmitting a second signal stream to a different second channel of the medium. The second signal stream is substantially temporally correlated to the first signal stream. The method includes receiving an SINR measured at a receiver configured to receive signals from the first channel. The SINR is measured while the receiver received the first signal stream. The method includes determining a channel matrix element between the first and second channels or a ratio of said channel matrix element to a diagonal element of the channel matrix. The act of determining is based on the received SINR. | 2009-03-05 |
20090060068 | Method and apparatus for bit interleaving and deinterleaving in wireless communication systems - Disclosed herein is a method and system for interleaving and deinterleaving of data bits in wireless data communications. Interleaving is performed as a single stage parallel operation using a single standard memory block. The disclosed method and system is capable of implementing different interleaving techniques, individually, or as a combination thereof. The disclosed system comprises a plurality of multiplexers, a standard memory block, read and write buses, control block, and a lookup table. The contents of the lookup table are generated based on an interleaving function. The data bits from the input bus and bits from the read bus of the memory are inputted to the plurality of multiplexers. Based on the lookup table's contents the multiplexers are switched to parallelly permute the input data bits and read bits from the read bus. The permuted data bits are in an interleaved sequence. | 2009-03-05 |
20090060069 | SIGNAL TRANSMITTING APPARATUS, METHOD THEREOF, AND INVERSE FAST FOURIER TRANSFORM APPARATUS FOR SIGNAL TRANSMITTING APPARATUS - The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption. | 2009-03-05 |
20090060070 | Apparatus and Method for Peak Suppression in Wireless Communication Systems - A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation. | 2009-03-05 |
20090060071 | DEMODULATION METHOD FOR RECEIVING OFDM SIGNALS, AND DEMODULATION APPARATUS AND RECEIVING APPARATUS USING THE SAME - A phase derivation unit derives a phase difference between two symbols for each subcarrier, based on phase components of symbols. A weighting factor derivation unit derives a weighting factor for each subcarrier, based on amplitude components of the symbols. A multiplier weights the phase difference with the weighting factor for each subcarrier. A likelihood accumulation unit accumulates the weighted phase differences for a plurality of subcarriers. A decision units determines a result of accumulation. A substitution unit identifies a portion where known data are to be assigned, among the determined data frames, and substitutes the data in the identified portion with known data. A syndrome computation unit performs a syndrome computation on the data frames. An error detector detects an error in the data frames, based on a result of the syndrome computation. | 2009-03-05 |
20090060072 | DECODING METHOD FOR RECEIVING OFDM SIGNALS, AND DECODING APPARATUS AND RECEIVING APPARATUS USING THE SAME - A phase derivation unit derives a phase difference between two symbols for each subcarrier, based on phase components of symbols. A weighting factor derivation unit derives a weighting factor for each subcarrier, based on amplitude components of the symbols. A multiplier weights the phase difference with the weighting factor for each subcarrier. A likelihood accumulation unit accumulates the weighted phase differences for a plurality of subcarriers. A decision units determines a result of accumulation. A substitution unit identifies a portion where known data are to be assigned, among the determined data frames, and substitutes the data in the identified portion with known data. A syndrome computation unit performs a syndrome computation on the data frames. An error detector detects an error in the data frames, based on a result of the syndrome computation. | 2009-03-05 |
20090060073 | METHOD FOR SUPPRESSING PEAK POWER OF ORTHOGONALLY MULTIPLEXED SIGNAL, PEAK POWER SUPPRESSING CIRCUIT, AND TRANSMITTER - To suppress the peak of the orthogonal multiplex transmission signal which is small in deterioration of the quality of the reception signal by generating the cancellation waveform in synchronization with the timing of the symbol of the transmission signal. There is provided a peak suppressing method that suppresses peaks of an orthogonally multiplexed signal whose orthogonality is ensured in given time units, the method comprising: a first step of detecting the peaks of the orthogonally multiplexed signal; a second step of generating a peak cancellation waveform based on the detected peaks of the orthogonally multiplexed signal; and a third step of removing the peak of the orthogonally multiplexed signal from the orthogonally multiplexed signal using the generated peak cancellation waveform. The second step comprises generating the peak cancellation waveform in said time units of the orthogonally multiplexed signal. | 2009-03-05 |
20090060074 | WIRELESS COMMUNICATIONS APPARATUS - Precoding a plurality of subcarriers in preparation for MIMO transmission is carried out by deriving preceding matrices from available information. When the number of data streams borne by the subcarriers equates to the number of transmit antennas employed in the MIMO transmission, the method comprises deriving, from respective acquired unitary precoder matrices for two of said subcarriers, interpolated precoder matrices for data streams intermediate the two subcarriers. The acquired and interpolated precoder matrices are then applied, as the case may be, at the respective subcarriers. The step of deriving the interpolated precoder matrices comprises determining an overall rotation matrix representing a transformation between the acquired precoder matrices, determining from the overall rotation matrix a further rotation matrix representing a step transformation for interpolation steps between said two subcarriers, and recursively applying said further rotation matrix to derive said interpolated precoder matrices. In the event that the number of data streams is less than the number of transmit antennas employed in said MIMO transmission, the rectangular precoder matrices should first be converted into square unitary matrices. | 2009-03-05 |
20090060075 | OFDM Modem Using Pilot Sub-Carrier Structure - An OFDM modem is presented that uses a pilot sub-carrier signal structure for channel estimation to reduce link latency of the modem, or alternatively, a pseudo-random number sequence inserted into the OFDM signal for later detection for channel estimation. The OFDM signal includes multiple symbols, each symbol having a plurality of closely-spaced, orthogonal data sub-carrier signals carrying data. In some implementations, one or more pilot sub-carrier signals are inserted with the data sub-carrier signals. Each pilot sub-carrier signal is modulated with a predetermined pilot modulation scheme. Each pilot sub-carrier signal is placed at a different sub-carrier signal location for each successive symbol duration of the OFDM signal to form a sliding pilot sub-carrier signal. | 2009-03-05 |
20090060076 | SYSTEM ACCESS AND SYNCHRONIZATION METHODS FOR MIMO OFDM COMMUNICATIONS SYSTEMS AND PHYSICAL LAYER PACKET AND PREAMBLE - A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame. | 2009-03-05 |
20090060077 | WIRELESS COMMUNICATION BASE STATION APPARATUS AND PILOT SIGNAL DISPOSING METHOD - A base station device is provided with features in which multicast data can be prevented from deterioration in the accuracy of channel estimation due to interference of a unicast data pilot signal when multicast data and unicast data are multiplexed for transmission. In this device, a unicast pilot signal generating unit ( | 2009-03-05 |
20090060078 | NEAR SOFT-OUTPUT MAXIMUM-LIKELIHOOD DETECTION FOR MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS - Systems and methodologies are described that provide low-complexity soft-output detection for MIMO communication systems. Looping can be performed over a set of constellation points per spatial stream to obtain distance metrics for each of a series of transmitted streams, for which values for the other transmitted streams can be estimated using a MIMO channel matrix and a sub-optimal MIMO algorithm. Examples of MIMO algorithms that can be utilized include Per-Stream List Detection (PSLD), Lattice-Reduced Detection (LRD), and a Guided-M Algorithm. Performance can be further improved by pre-processing the MIMO channel matrix and/or by utilizing techniques for Enhanced Metric Usage (EMU). | 2009-03-05 |
20090060079 | METHOD FOR DETECTING A SYMBOL USING TRELLIS STRUCTURE ON THE MULTIPLE INPUT MULTIPLE OUTPUT MOBILE COMMUNICATION SYSTEM - Disclosed is a method for detecting a symbol using a trellis structure on a multiple input multiple output (MIMO) mobile communication system. The method includes the steps of: setting a plurality of states by grouping symbols producible from a receiving signal in the unit of sub-states; calculating metric values for paths inputted to the sub-states and selecting paths having the calculated metric values smaller than a preset first threshold, as first surviving paths; setting a second threshold based on an accumulated metric value of a path having the smallest accumulated metric in each of the states; and selecting paths having metric value smaller than the second threshold, as second surviving paths, among the first surviving paths selected for each state. | 2009-03-05 |
20090060080 | METHODS AND APPARATUS FOR LOCATION-BASED RATE LIMITING IN WIRELESS NETWORKS - Methods and systems are provided for location-based network rate limiting The system allows an administrator to logically partition an environment into a plurality of spatial regions. The method then includes specifying, for each of the spatial regions, a rate limit for that spatial region, then performing a locationing procedure to determine in which spatial region the mobile unit is located. Rate limiting is applied based on the location of the mobile unit. The systems and methods are applicable, for example, to networks operating in accordance with 802.11, RFID, WiMax, WAN, Bluetooth, Zigbee, UWB, and the like. | 2009-03-05 |
20090060081 | Systems and methods for ofdm channelization - Systems and methods for OFDM channelization are provided that allow for the co-existence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided, and systematic channel definition and labeling schemes are provided. | 2009-03-05 |
20090060082 | WIRELESS COMMUNICATION APPARATUS, AND FEEDBACK INFORMATION GENERATING METHOD - A wireless communication apparatus that allows channel information to be reproduced with high precision at a transmitting end without increasing feedback information amount. In this apparatus, a channel estimating part ( | 2009-03-05 |
20090060083 | RECEIVER CIRCUIT - A receiver circuit includes a voltage controller configured to output an offset voltage varied according to a control code; and a multilevel receiving block configured to be controlled by the offset voltage and to amplify and output input data signal having multilevels. | 2009-03-05 |
20090060084 | Data receiver apparatus and data transmitter apparatus - Write pointer generation units successively switch and indicate storage locations of data transmitted from a transmitter end LSI from plural buffers constituting FIFO circuits. A clock-step ring buffer delays a gated step signal to instruct an operation stop. When receiving the gated stop signal delayed by the clock-step ring buffer, the write pointer generation units stop switching instructions of the storage locations. | 2009-03-05 |
20090060085 | System and method for wrist band transmitter and system thereof - A light weight transmission device providing an identification signal is disclosed. In one aspect, the device comprises a gating device for controlling the transfer of information to the transmitter, a data retaining device, in communication with the gating device, receiving and storing the information for a known period of time, and a controller, in communication with the gating device, providing a signal to the gating device to enable transfer of the retained information to the transmitter at a known time and for a known period of time. | 2009-03-05 |
20090060086 | TERMINAL AWARE MULTICASTING - Methods, systems, and devices are described for using adaptive coding and modulation (“ACM”) to adaptively communicate with a plurality of data terminals having different capabilities. Embodiments provide hierarchical communications of content, generated by applying hierarchical pre-coding schemes to the source data and then associating the pre-coding levels with coding and modulation schemes of varying order. The pre-coding and/or coding and modulation may be based on one or more capabilities of the data terminals in the network. In some embodiments, data terminals may be used to cache certain data intended for other data terminals, for example, to allow time-shifted playback of the content on terminals with varying capabilities. | 2009-03-05 |
20090060087 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD THEREOF - A digital broadcasting system and a data processing method thereof are provided. An apparatus for generating a transport stream includes a packet generator for generating a plurality of packets by compressing video and audio signals; a counter for counting the number of the generated packets and outputting the count result; and an information controller for determining whether the count result of counting reaches a predetermined number of packets, inserting packet start information into the packets according to the count result, and transmitting the packets with the packet start information inserted therein. The packet start information is added to a packet to be transmitted in a transmitter, and the packet start information is extracted from the received packet in a receiver, so that the waste of frequency resources can be reduced. | 2009-03-05 |
20090060088 | Detecting the number of transmit antennas in a base station - Data is scrambled at a transmitter according to one of a number of predetermined scrambling sequences which are associated with a particular one of a number of predetermined transmit antenna diversity schemes (i.e., a specific number of transmit antenna ports). Received data is decoded using one or more of the known transmit antenna diversity schemes and the scrambled data is descrambled according to a corresponding descrambling sequence (related to the scrambling sequence). Based on the descrambled data, the receiver determines which transmit antenna, diversity scheme (i.e., the number of antenna ports) is used by the transmitter. In one specific embodiment, CRC parity data is scrambled in the transmitter and the receiver descrambles the recovered CRC parity data according to a descrambling sequence, computes CRC parity data from the received data, and compares the descrambled CRC parity data to the newly computed CRC parity data. | 2009-03-05 |
20090060089 | POLAR MODULATION TRANSMITTER CIRCUIT AND COMMUNICATIONS DEVICE - Provided is a transmitter circuit capable of operating with low distortion and high efficiency even in a modulation method using wide modulation bandwidth. In the transmitter circuit, a signal generation section ( | 2009-03-05 |