17th week of 2009 patent applcation highlights part 31 |
Patent application number | Title | Published |
20090103559 | Method and Apparatus for Communicating Data Over a Data Network - A management device for automatically provisioning a Broadband Remote Access Server (BRAS) for use in connecting Customer Premises Equipment (CPE) to an Internet Protocol (IP) network via a Digital Subscriber Line (DSL) a Digital Subscriber Line Access Multiplexor (DSLAM) and the BRAS, the management device comprising: a first interface for receiving from time to time data readings from the DSLAM indicative of the current or recent line rate of the DSL; a processor unit for calculating from the received data readings a consistent rate indicative of a consistent line rate of the DSL based on a plurality of data readings for the DSL from the DSLAM; and a second interface for transmitting provisioning messages to the BRAS for provisioning the BRAS to restrict data flowing to the DSL to a maximum rate selected by the management device in accordance with the calculated consistent rate. | 2009-04-23 |
20090103560 | TELECOMMUNICATION AND MULTIMEDIA MANAGEMENT METHOD AND APPARATUS - An improved communication apparatus for transmitting media between a sending node and a receiving node during a conversation. When network bandwidth is insufficient to transmit a full bit rate representation of time-sensitive media, the sending node generates and transmits a reduced bit rate representation of the media for the purpose of increasing the ability of the recipient to review the media upon receipt and continue the conversation in the real-time mode when the bandwidth on the network is insufficient to support the transmission of the full bit rate representation. The sending node also transmits media that is ascertained as not time-sensitive only when bandwidth in excess of what is needed for time-sensitive media becomes available. When the media ascertained as not time-sensitive is transmitted, the rate of transmission is adjusted at the sending node based on network conditions, the adjusted rate of transmission being set for network efficiency and reliable delivery of the media ascertained as not time-sensitive relative to the timeliness of the delivery of the media ascertained as time-sensitive. | 2009-04-23 |
20090103561 | Cyclic bandwidth allocation method with HARQ enabled - A method is described which includes allocating transmission resources for transmitting data packets. The allocation of transmission resources includes a periodic allocation of the transmission resources that is applicable to a plurality of frames. The allocation of transmission resources includes an allocation of transmission resources for a first transmission of each HARQ process during the plurality of frames. The method includes receiving an indication of an allocation of transmission resources for data packets in a plurality of frames. Receiving and/or transmitting packets during the plurality of frames using the allocation of transmission resources is also included in the method. The frames in the plurality of frames may include a compressed MAC header. Apparatus and computer programs are also described. | 2009-04-23 |
20090103562 | Signaling limitation of multiple payload sizes for resource assignments - Introducing a set of limitations on where different payload sizes are allowed in a control channel element aggregation ‘tree’ is shown. Following these limitations, the network element (e.g. Node B) will have a large flexibility for scheduling users, while the terminal (e.g. User Equipment) will have an option for still keeping the number of blind decoding attempts at a quite low number. | 2009-04-23 |
20090103563 | PACKET TRANSMITTING METHOD AND DEVICE - A packet transmission device of a physical layer receives a plurality of packets from a media access control layer that is an upper layer of the physical layer, and detects a packet including a sync message from the packets. The packet transmission device receives first time information for synchronization from the media access control layer, inserts first time information into the sync message, and transmits packets at a predetermined data rate. | 2009-04-23 |
20090103564 | Method and apparatus for controlling media access in sensor network - Provided are a method and apparatus for controlling media access in a sensor network and a method of managing traffic information. Since traffic information is exchanged between nodes and data is transmitted by using a dynamic long preamble according to receiver nodes, data transmission efficiency can be improved, energy consumed to transmit the long preamble can be reduced, and data transmission delay can be reduced as well. | 2009-04-23 |
20090103565 | DATA TRANSMISSION SYSTEM, TRANSMITTER, AND DATA TRANSMISSION CONTROL METHOD - A first transmitter transmits input data through a plurality of paths belonging to a path group. A second transmitter receives the data transmitted from the first transmitter through the plurality of paths, temporarily stores an amount of the data corresponding to a phase difference between the plurality of paths in a first buffer to absorb the phase difference, and outputs the data, whose phase difference has been absorbed, through a second buffer. When a path is deleted from the path group, the first transmitter reduces a data rate for data transmitted from the first transmitter to the second transmitter, and then deletes the path from the path group. | 2009-04-23 |
20090103566 | SWITCH PORT ANALYZERS - Methods and devices are provided for non-disruptive monitoring of network traffic through one or more ports of a Fibre Channel network device. Preferred embodiments of the invention are used in conjunction with the switched port analyzer (“SPAN”) and/or remote SPAN (“RSPAN”) features. SPAN mode operation allows traffic through any Fibre Channel interface of a network device to be replicated and delivered to a single port on the same network device. Ingress SPAN allows the monitoring of some or all packets that ingress a specified port or ports. Egress SPAN allows the monitoring of some or all packets that egress a specified port or ports. RSPAN allows the delivery of the replicated traffic to a port on a remote network device. Filtering may be applied, for example, to SPAN packets having selected virtual storage area network numbers. | 2009-04-23 |
20090103567 | Code division multiplex transmitting and receiving apparatus and method - A code division multiplex transmitting and receiving apparatus has a transmitting apparatus with two coders per channel and terminal units with two matched filters each. One coder and one matched filter employ one spreading code; the other coder and the other matched filter employ another spreading code. The two coded signals output in parallel by the two coders are converted to a single serial signal before being multiplexed. The two matched filters sample alternate chips in the multiplexed signal. The two coders can be supplied with different data signals to double the transmission capacity, or with the same data signal to double the transmission distance. The outputs of the two matched filters are processed separately in the former case and are combined in the latter case. | 2009-04-23 |
20090103568 | Method and System for Non-Gaussian Code-Division-Multiple-Access Signal Transmission and Reception - The present invention relates to a method and system for non-Gaussian code-division-multiple-access signal transmission and reception. Input probability data indicative of a non-equiprobable channel input probability mass function are determined based on received channel data indicative of characteristics of a CDMA transmission channel. The input probability data are determined such that a transmission signal received after transmission has a non-Gaussian distribution. Upon receipt of input user data, a CDMA signal is generated by modulating the received user input data in dependence upon the input probability data and provided for transmission. After transmission a received transmission signal is first processed for determining second channel data and then for determining an estimate indicative of the user input data based on the second channel data. | 2009-04-23 |
20090103569 | SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING SIGNAL IN A COMMUNICATION SYSTEM - A system and method for transmitting/receiving a signal in a communication system are provided, in which a transmitter determines to change a transmission time of a superframe header, when a structure of a superframe is changed, determines the transmission time of the superframe header according to a result of the determination to change the transmission time of the superframe header, transmits information about the determined transmission time to a receiver, and transmits the superframe header at the determined transmission time. | 2009-04-23 |
20090103570 | Time Synchronization in Serial Communications - A real-time clock ( | 2009-04-23 |
20090103571 | Under sampled clock signal synchronization aid device and device for reconstructing undersampled clock signals, for a packet-switched network - A synchronization aid device is part of receiving communication equipment of an IP network, having a primary clock signal consisting of primary clock pulses spaced apart by a first period. This device comprises i) a required to increment its value by one unit on each primary clock pulse and reset its value to zero each time it reaches a value M, ii) detection means required to generate a secondary clock pulse each time the value of the counter is zero, the secondary clock pulses forming a secondary clock signal having a second period equal to M times the first period, and iii) control means required, each time the receiving equipment receives a packet containing at least one first bit having a first value, to initialize the counter with a chosen value. | 2009-04-23 |
20090103572 | Crosstalk Minimization in Serial Link Systems - Described are methods and circuits for reducing the error-inducing effects of crosstalk. Communication circuits in accordance with some embodiments adjust the phase of transmitted “aggressor” data to misalign transmitted signals from the perspective of “victim” channels. This misalignment moves the noise artifacts cross coupled to the victim channel away from sensitive sample times in the victim data, and consequently reduces the net effects of aggressor crosstalk on neighboring victim channels. Some embodiments reduce the effects of crosstalk by introducing static timing offsets to one or a plurality of aggressor transmitters, one or a plurality of victim transmitters, or some combination of aggressor and victim transmitters. Other embodiments dynamically alter the relative timing of aggressor and victim transmitters. | 2009-04-23 |
20090103573 | Voice and Data Exchange Over a Packet Based Network With DTMF - A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange. | 2009-04-23 |
20090103574 | LASER MODULE PACKAGE AND DISPLAY APPARATUS USING THE SAME - Disclosed are a laser module apparatus and a display apparatus using the same. In accordance with an embodiment of the present invention, a laser module package which generates a green laser beam can include a pumping light source, configured to generate and output a pump beam; a laser medium, configured to receive the pump beam and output an infrared beam; an optical crystal, configured to receive the infrared beam and output a laser beam having a green wavelength band; and a micro heater, configured to be thermally coupled to the pumping light source and control an operation temperature of the pumping light source to be maintained to a predetermined target temperature. | 2009-04-23 |
20090103575 | LASER DEVICE - A laser device, which includes an oscillator unit having a rectangular-solid-shaped housing containing a laser oscillator for generating and outputting a laser light; an amplifier unit having a rectangular-solid-shaped housing containing an amplifier that receives and amplifies the laser light to output; and, a group of optical elements including optical elements provided on a laser light path, wherein the laser device includes one or more amplifier units, and the oscillator and the amplifier units are arranged such that surfaces having a wide area other than a surface having a smallest area of a housing of the oscillator unit and a housing of at least one amplifier unit are next to and face each other, or such that surfaces having a wide area other than a surface having a smallest area of a housing of at least two amplifier units are next to and face each other. | 2009-04-23 |
20090103576 | System and Method of Providing Second Harmonic Generation (SHG) Light in a Single Pass - A system and method of providing second harmonic generation (SHG) light in a single pass. A frequency stabilized semiconductor seed laser provides a first frequency light to a fiber amplifier. A focusing optic configuration receives the amplified first frequency light and focuses the amplified first frequency light into a non-linear material. A harmonic separator separates the first frequency light from the second frequency light and an optical output structure outputs the second frequency light. | 2009-04-23 |
20090103577 | BEAM IRRADIATION APPARATUS - A laser beam and a servo beam are incident on a mirror and a transparent member, respectively, so that an angle direction A | 2009-04-23 |
20090103578 | Method of Protecting a Laser Against Damage Caused by Undesired Incident Light in a Resonator - A method of protecting a laser against damage caused by undesired incident light in a resonator includes measuring a parameter, which is a measure for the optical power of the incident light. In more concrete terms, the optical power occurring at a resonator mirror is measured. In response to a result of the measurement, a pumping power for the laser is reduced to reduce the optical power in the resonator to a value that is uncritical for the laser. | 2009-04-23 |
20090103579 | PROCESSING APPARATUS AND METHOD OF PROCESSING AND METHOD OF MAKING LEAF SPRING - A light source emits a laser beam to the object through an output end. An optical system is placed between the output end and the object. The optical system adjusts the energy of the laser beam emitted, through the output end, onto a unit area for a unit time. The energy of the beam spot on the object enables cutting or bending of the object. The optical system serves to adjust the energy of the laser beam irradiated to the object. The energy of the laser beam instantly changes as compared with the case where the energy of the laser beam is adjusted based on a driving voltage applied to a laser oscillator. The object is thus processed by using the laser beam with high accuracy. | 2009-04-23 |
20090103580 | Vertically displaced stack of multi-mode single emitter laser diodes - An optical source comprised of a stack of at least two laser diode subassemblies is provided. Each laser diode subassembly includes a submount and a multi-mode, single emitter laser diode. Each of the at least two laser diode subassemblies is mounted to a stepped mounting member such that the output beams from the at least two laser diode subassemblies are vertically displaced along the z-axis, horizontally displaced along the y-axis, and not horizontally displaced along the x-axis. | 2009-04-23 |
20090103581 | SEMICONDUCTOR LASER DEVICE - In a semiconductor laser device, in a case where an emission direction of a laser beam from a semiconductor laser element portion is a front side, a first front end of a first lead is arranged rearward beyond a first rear end of a second heatsink, and a second surface portion of the second heatsink electrically connected to the semiconductor laser element portion is electrically connected to the first front end. | 2009-04-23 |
20090103582 | OPTICAL WAVEGUIDE DEVICE AND MANUFACTURING METHOD THEREOF - An optical waveguide device which is free from interference with an optical path between a light emitting element and an optical waveguide thereof, and to provide a method of manufacturing the optical waveguide device. A light emitting element ( | 2009-04-23 |
20090103583 | Surface emitting laser and manufacturing method thereof - On an n-type GaN buffer layer serving as a common semiconductor layer, mesa regions are formed. The mesa region is formed of a semiconductor stack formed of an n-type GaN layer, an active layer and a p-type GaN layer. A current blocking region is not formed in the mesa region, and the mesa diameter of the mesa region is formed to be not more than 15 μm. The mesa region is formed by selective growth. The mesa region without a surface damage allows sufficient constriction of current and an induced radiation of laser with low current. | 2009-04-23 |
20090103584 | Nitride semiconductor laser device and method of producing the same - A nitride semiconductor laser device has a semiconductor multi-layer structure that includes a lower clad layer of a first conductive type, an active layer, and an upper clad layer of a second conductive type stacked in this order on a substrate, wherein a layer under the active layer includes a stripe-like trench; the semiconductor multi-layer structure includes a stripe-like optical cavity arranged along the stripe-like trench; the stripe-like trench has a narrower width in its both end regions compared to its central main region; and the active layer is formed of a nitride semiconductor containing In. | 2009-04-23 |
20090103585 | Optical semiconductor element and optical semiconductor device - An optical semiconductor device includes an optical semiconductor element, a metal pattern and at least one thermal conductive material. The optical semiconductor element has a first optical waveguide region and a second optical waveguide region. The second optical waveguide region is optically coupled to the first optical waveguide region and has a heater for changing a refractive index of the second optical waveguide region. The metal pattern is provided on an area to be thermally coupled to a temperature control device. The thermal conductive material couples the metal pattern with an upper face of the first optical waveguide region of the optical semiconductor element. The thermal conductive material is electrically separated from the first optical waveguide region. | 2009-04-23 |
20090103586 | METHOD OF ANALYZING THE KINETICS OF GAS HYDRATE FORMATION IN FLUIDS - The present invention relates to a method for determining the kinetics of gas hydrate formation in a fluid comprising water, wherein the following stages are carried out:
| 2009-04-23 |
20090103587 | MONITORING APPARATUS AND CORRESPONDING METHOD - A monitoring apparatus configured to monitor a temperature related condition of a compartment of a refrigerator which is cooled by a cooling system. The monitoring apparatus includes a sensor configured to sense a temperature of the compartment when the cooling system is not operating. A processor is configured to send processed information based on the sensed temperature. An indicator is configured to receive the processed information from the processor and to indicate, when the cooling system recommences operation, (i) a duration that the cooling system was not operating and (ii) a temperature of the compartment when the cooling system was not operating. | 2009-04-23 |
20090103588 | Microscope apparatus - A microscope apparatus includes: a microscope unit; a chamber, arranged next to the microscope unit, that houses a specimen to be observed by the microscope unit; a humidifier, connected to the chamber, that humidifies the interior of the chamber; a chamber temperature sensor that measures a temperature within the chamber; a microscope temperature sensor that measures a temperature of the microscope unit; and a determination device that determines whether or not observation by microscope is possible based on outputs of the chamber temperature sensor and the microscope temperature sensor. | 2009-04-23 |
20090103589 | Incoherent type mimo UWB communication system - This invention relates to a space-time coding process for a pulse type MIMO-UWB system using symbols belonging to a PPM modulation alphabet. Orthogonality of signals emitted by the different antennas is achieved by providing a mechanism for permutation of PPM symbol modulation positions and by imposing a constraint on the positions of said symbols. The space-time coding process according to the invention enables an incoherent type reception. | 2009-04-23 |
20090103590 | Code Division Multiple Access Wireless System With Closed Loop Mode Using Ninety Degree Phase Rotation And Beamformer Verification - A wireless communication system ( | 2009-04-23 |
20090103591 | Bit confidence weighting based on levels of interference - Methods and systems of frequency hopping communication are disclosed. One method includes a receiver obtaining a frequency hopping sequence, wherein the frequency hopping sequence defines a time sequence of reception through each of a plurality of frequency hopping bands. For each of the plurality of frequency hopping bands, the receiver estimates an interference level and assigns a band weight to the frequency hopping band based on the estimated interference level. The receiver receives a signal that includes symbols occupying the plurality of frequency hopping bands according to the frequency hopping sequence, and demodulates the symbols producing a stream of estimated bit values and corresponding bit value confidence levels. The bit value confidence levels of each of the estimated bit values are adjusted according to the band weight of a corresponding frequency hopping band. | 2009-04-23 |
20090103592 | MYRIAD FILTER DETECTOR FOR MULTIUSER COMMUNICATION - An adaptive receiver for multiple access communication, illustratively UWB multiple access communication, is provided. One embodiment of a detector is derived based on the finding that an symmetric alpha-stable model is more suitable for modeling the MAI in multiuser UWB systems than existing models. A myriad filter detector works better than all the known receiver structures proposed for statistical MAI cancellation. An intuitive expression for the tuning parameter K is provided which worked well in the examples considered. | 2009-04-23 |
20090103593 | Array Antenna System and Spread Spectrum Beamformer Method - A method for transmitting digital beamformed signals in a transmit array antenna apparatus utilizing a single transceiver with one power amplifier, one up-frequency converter and one digital-to-analog converter for said array transmit antenna apparatus comprising the steps of: generating a first set of direct-sequence spread spectrum codes; generating a plurality of weights, each weight being a beamforming amplitude and phase or delay for each element; generating a direct-sequence spread spectrum multiplexed signal containing such weights while using one of such first-set codes per element; converting such an multiplexed signal to a convenient radio frequency; amplifying and transmitting such a multiplexed radio frequency signal to the elements; generating a second set of direct-sequence spread spectrum codes; extracting a radio frequency signal with direction-bearing weight information at each element while using a subset of codes from the second set; generating a third set of direct-sequence spread spectrum codes at each element; transmitting a signal with array gain beamformed towards a specific direction while using a transmit array apparatus composed of spaced elements, such a transmit beamformed signal being a radio frequency signal, a direct-sequence spread spectrum radio frequency signal containing a subset of codes from the third set, or a sequence of radio frequency pulses that have short duration and high power. | 2009-04-23 |
20090103594 | Communications module, device, and method for implementing a system acquisition function - A communications module, device and corresponding method for facilitating PN code searching. The module and device have a PN sequence generator configurable to generate a plurality of PN sequences. The module and device also include computational units configurable to correlate received signal samples of a plurality of received signal samples with a corresponding PN sequence of the plurality of PN sequences, and further configurable to provide other hardware resources. A number of computational units from the plurality of computational units are selectively configured to correlate the received signal samples with the PN sequences—the number depending upon availability of the plurality of computational units from providing the other hardware resources. According to a preferred embodiment, a plurality of configurable computational units are selectively configurable to implement the PN sequence generator. | 2009-04-23 |
20090103595 | Device and method for transmitting/receiving pulse signal - A pulse signal transmitting/receiving device is provided. The device includes a signal generating module for generating a transmitting signal including an amplitude-modulated chirp signal, and a reference signal including a chirp signal having a frequency that changes similarly to that of the transmitting signal, a transmitting module for transmitting a pulse having approximately the same waveform as that of the transmitting signal, a receiving module for receiving an echo signal that is the transmitting pulse reflected from a detection target object, a compensating module for extending a dynamic range of the echo signal received by the receiving module, and a pulse compressing module for outputting a pulse-compressed echo signal, wherein the pulse compression is performed by a correlation calculation between the echo signal having the dynamic range extended by the compensating module, and the reference signal. | 2009-04-23 |
20090103596 | IF INTERFACE - Systems, devices, and methods may be provided for communicating telemetry signals between a satellite modem and transceiver over an IF receive link. In an exemplary embodiment, a communication system comprises a modem, a transceiver, an IF receive communication link coupling the modem and the transceiver and configured to allow IF communication between the modem and the transceiver, and a transceiver interface module and a modem interface module, wherein the modules are configured to allow telemetry communication between the modem and the transceiver over the IF receive communication link. | 2009-04-23 |
20090103597 | WIRELESS MODEM SYSTEM AND METHOD FOR CONNECTING TO COMMUNICATION NETWORK USING THE SAME - A wireless modem connection apparatus including a connection unit for connecting a first and second modem and to a portable computer; and a control unit for detecting radio wave reception strength of each of first and second communication networks connected through the first and second modems and setting an operation mode of each of the first and second modems and depending on the radio wave reception strength, whereby a power limit of a USB interface is not exceeded even when both a wireless modem for a CDMA communication network and a wireless modem for a WiBro communication modem are simultaneously connected to a PC. | 2009-04-23 |
20090103598 | Link adaptation in wireless networks for throughput maximization under retransmissions - The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently allocate bandwidth resources. The present invention encompasses a refined calculus and methodology for deriving the link adaptation thresholds in a retransmission environment using a complex model and analysis of the retransmission environment. The present invention holds particular application for wireless data communications as opposed to real time data services because it is based on a retransmission model applicable primarily for data services. A critical component of this new link adaptation system is a “no transmission” cutoff mode that is selected for SIR below a base threshold value. This new mode prevents system instability and misallocation of bandwidth in a wireless communication system. | 2009-04-23 |
20090103599 | DUAL TRANSMISSION STREAM GENERATING DEVICE AND METHOD - A dual transmission stream generating device includes an adaptor to receive a normal stream and to generate an adaptation field in an area of a packet of the normal stream; and a stuffer to generate a packet for a dual transmission stream by stuffing a turbo stream into the adaptation field. Accordingly, the turbo stream and the normal stream can be transmitted efficiently by the generation of the dual transmission stream in various constructions. | 2009-04-23 |
20090103600 | MOBILE RECEIVER EQUALIZER STRUCTURE FOR USE IN THE ATSC STANDARD - A receiving device is provided that comprises: a channel estimator adapted to receive an input; and an equalizer adapted to receive the input and generate an equalized output, wherein the equalized output is used by the channel estimator for at least one subsequent channel estimation. | 2009-04-23 |
20090103601 | Methods for Soft Bit Companding for Time De-interleaving of Digital Signals - This invention provides methods for reducing the bit width of soft information, while maintaining a large dynamic range by applying compression and expansion. In particular, this invention provides methods for time de-interleaving of soft information, comprising the steps of: quantizing the soft information into a first soft information having a first pre-defined number of bits; compressing the first soft information into a second soft information having a second pre-defined number of bits; time de-interleaving the second soft information; and decompressing the time de-interleaved second soft information. | 2009-04-23 |
20090103602 | Overcomplete basis transform-based motion residual frame coding method and apparatus for video compression - The present invention provides a method to compress digital moving pictures or video signals based on an overcomplete basis transform using a modified Matching Pursuit algorithm. More particularly, this invention focuses on the efficient coding of the motion residual image, which is generated by the process of motion estimation and compensation. A residual energy segmentation algorithm (RESA) can be used to obtain an initial estimate of the shape and position of high-energy regions in the residual image. A progressive elimination algorithm (PEA) can be used to reduce the number of matching evaluations in the matching pursuits process. RESA and PEA can speed up the encoder by many times for finding the matched basis from the pre-specified overcomplete basis dictionary. Three parameters of the matched pattern form an atom, which defines the index into the dictionary and the position of the selected basis, as well as the inner product between the chosen basis pattern and the residual signal. The present invention provides a new atom position coding method using quad tree like techniques and a new atom modulus quantization scheme. A simple and efficient adaptive mechanism is provided for the quantization and position coding design to allow a system according to the present invention to operate properly in low, medium and high bit rate situations. These new algorithm components can result in a faster encoding process and improved compression performance over previous matching pursuit based video coders. | 2009-04-23 |
20090103603 | SIMULCAST REPRODUCING METHOD - According to an aspect of an embodiment, a method for reproducing moving pictures upon receiving simulcast first bit stream and second bit stream, the method comprising: receiving the first bit stream and the second bit stream simultaneously; decoding the first bit stream into a first moving picture comprising a first series of frames; decoding the second bit stream into a second moving picture a second series of frames; detecting an error in the first bit stream which disturbs reproduction of a particular frame from the first bit stream; and correcting the error in the first bit stream by supplementing correction data generated from data indicative of a difference between adjacent frames in the second moving picture, the correction data being used to reproduce a frame to replace the particular frame on the basis of a immediately preceding frame in the first picture. | 2009-04-23 |
20090103604 | Method and Apparatus for On-Chip Voltage Controlled Oscillator Function - This invention uses a flying adder frequency synthesis circuit to provide the required frequency adjustments to accommodate the varying encoding density of a MPEG2 video data stream. This invention adjusts the local clock based on the information extracted from the program clock reference signal in the incoming data. This invention replaces an external or internal voltage-controlled crystal oscillator using a phase locked loop circuit on the video processing integrated circuit. | 2009-04-23 |
20090103605 | PROCESSING IDENTIFIABLE VIDEO STREAMS OF A PROGRAM ACCORDING TO STREAM TYPE VALUES - Methods and systems for the efficient and non-redundant transmission of a single video program in multiple frame rates, optionally employing a combination of video coding standards, in a way that is backwards-compatible with legacy receivers only supportive of some subsection of frame rates or of some subsection of video coding standards. | 2009-04-23 |
20090103606 | Progressive Distributed Video Coding - Progressive distributed video coding is described. In one implementation, video data maybe encoded by arranging the data into bit-planes. The arrangement of bit-planes is adapted by shifting the first non-zero bit-plane left by one place in the binary digits and moving the sign bit immediately in the place vacated by the shifted non-zero bit-plane. The adapted bit-planes are then encoded using an asymmetric Slepian-Wolf encoder. | 2009-04-23 |
20090103607 | SYSTEMS AND METHODS FOR CONTROLLING THE ENCODING OF A MEDIA STREAM - Systems and methods are described for providing a media stream transmitted from an encoding system to a remotely-located media player. The media stream is encoded according to an encoding parameter. Data is gathered about a transmit buffer within the encoding system, and the gathered data is processed to arrive at an estimate of network capacity and a calculated encoder rate. The encoding parameter is adjusted during subsequent encoding in response to a change in at least one of the estimate of network capacity and the calculated encoder rate. | 2009-04-23 |
20090103608 | METHOD AND SYSTEM FOR ENTROPY CODING - A method and system are provided for encoding a plurality of integers with variable-length code tables constructed by combining a plurality of structured code tables. Each code table has an associated set of integer values; the sets are disjoint and exhaustive, so that every integer appears in exactly one set. An integer is encoded using the codebook associated with the set in which the integer appears. | 2009-04-23 |
20090103609 | ADAPTIVE RATE CONTROL FOR ENCODING OF VARIABLE FRAME RATE VIDEO SOURCES - Methods, systems, and apparatuses for performing rate control for encoding of video frames are provided. A first timestamp is received that indicates a capture time for a prior video frame. A second timestamp is received that indicates a capture time for a current video frame. A time difference between the second timestamp and the first timestamp is determined. An average video data bit encoding rate is multiplied by the determined time difference to calculate a bit budget. An indication of a number of video data bits that have been encoded is received. The number includes a number of encoded video data bits of the prior video frame and of any further video frames encoded subsequent to the prior video frame and prior to the current video frame. A virtual buffer fill level is adjusted based on a difference between the indicated number of video bits that have been encoded and the calculated bit budget. A quantizer parameter is adjusted based on the adjusted virtual buffer fill level. The current video frame is encoded according to the adjusted quantizer parameter. | 2009-04-23 |
20090103610 | RATE CONTROL FOR VIDEO CODER EMPLOYING ADAPTIVE LINEAR REGRESSION BITS MODELING - A rate control system is disclosed for video coding applications. The rate controller assigns a quantization parameter for video data in a picture in response to complexity indicators indicative of spatial complexity, motion complexity and/or bits per pel of the picture. A virtual buffer based quantizer parameter is proposed based on a virtual buffer fullness analysis and a target rate estimate, which is derived from the complexity indicators. A second quantizer parameter is proposed from a linear regression analysis of quantizer parameters used to code previously coded pictures of similar type (e.g., I pictures, P pictures or B pictures). A coding policy decision unit defines a final quantizer parameter from a comparison of the two proposed quantizer parameters. | 2009-04-23 |
20090103611 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103612 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103613 | Method for Decoding Video Signal Encoded Using Inter-Layer Prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_pediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame. | 2009-04-23 |
20090103614 | Picture coding method and picture decoding method - A picture coding apparatus ( | 2009-04-23 |
20090103615 | Simplified Inter-layer Motion Prediction for Scalable Video Coding - The invention relates to a method for determining for a high layer macroblock that uses inter-layer prediction a partitioning of the macroblock in partitions. It comprises the following steps: —dividing the high layer macroblock in non-overlapping high layer blocks of a predefined size; —determining a corresponding base layer pixel for one pixel, called reference pixel, of each high layer block; —identifying, for each reference pixel, a base layer macroblock to which the corresponding base layer pixel belongs, a base layer partition to which the corresponding base layer pixel belongs in the identified base layer macroblock, a base layer sub-partition to which the corresponding base layer pixel belongs in the identified base layer partition if the sub-partition exists; —deriving, for each of the high layer block, a single value, called Part Info value; and —determining a partitioning of the high layer macroblock in macroblock partitions by comparing between them the Part Info values associated with each of the high layer blocks. | 2009-04-23 |
20090103616 | METHOD AND DEVICE FOR GENERATING DEPTH IMAGE USING REFERENCE IMAGE, METHOD FOR ENCODING/DECODING DEPTH IMAGE, ENCODER OR DECODER FOR THE SAME, AND RECORDING MEDIUM RECORDING IMAGE GENERATED USING THE METHOD - The present invention relates to a method and device for generating a depth image, a method for encoding/decoding the depth image, an encoder/decoder for the same, and a recording medium recording an image generated by the method, which are related to a depth image encoding method that can effectively reduce a bit generation rate using a reference image obtained by at least one camera and improve encoding efficiency. A depth image generating method according to an embodiment of the invention includes a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image. | 2009-04-23 |
20090103617 | EFFICIENT ERROR RECOVERY WITH INTRA-REFRESH - Systems and methodologies for concealing errors related to INTRA-frame losses in a transmitted video signal are provided herein. Systems and methodologies provided herein can refine a lost INTRA-coded frame and its subsequent INTER-coded frames using INTRA-coded macroblocks that are provided in a video bitstream in accordance with a Random INTRA Refresh (RIR) scheme. When an INTRA-frame is lost, INTRA-coded macroblocks can be used to refine neighboring INTER-coded macroblocks based on region filling, spatial interpolation, or other algorithms that are based on the strong correlation between values of adjacent pixels in a video signal. Further, motion compensation can be used to refine an INTER-coded pixel having an INTRA-coded pixel in its motion trajectory. | 2009-04-23 |
20090103618 | PICTURE CODING APPARATUS AND PICTURE CODING METHOD - The picture coding apparatus includes: a picture feature amount extracting unit which extracts respective feature amounts of the current picture and a picture having a specific relationship with the current picture; a correlation degree calculating unit which calculates, based on the feature amount extracted by the feature amount extracting unit, a correlation degree indicating a degree of image similarity between the current picture and the picture having a specific relationship with the current picture; a picture type determining unit which determines, depending on the calculated correlation degree, a picture type for the current picture, from two picture types on which different inter-picture prediction is performed; and a coding unit which codes the current picture according to the determined picture type. | 2009-04-23 |
20090103619 | METHOD OF CODING AND DECODING MULTIVIEW SEQUENCE AND METHOD OF DISPLAYING THEREOF - A method of coding/decoding a multiview sequence and display method thereof are disclosed, by which multiview sequence data can be efficiently coded and decoded. A multiview sequence coding method according to the present invention includes a step of generating a bit stream by encoding a plurality of pictures acquired from a plurality of views, wherein the bit stream includes view information for each of a plurality of the pictures and wherein the view information is information designating that the corresponding picture corresponds to which view among a plurality of the views. Accordingly, the multiview sequence is encoded to be selectively decoded for display. | 2009-04-23 |
20090103620 | VIDEO ENCODING METHOD AND APPARATUS AND VIDEO DECODING METHOD AND APPARATUS - Provided are a video encoding method and apparatus and a video decoding method and apparatus in which a processing order for predetermined-size blocks included in a macroblock is defined in order to efficiently use spatial correlation in an image. After a macroblock is divided into first blocks of a predetermined size and motion compensation is performed on each of the first blocks, a second-block processing order for sequentially processing second blocks included in a current first block is determined in order to process a residue between a motion compensation value of the current first block and the current first block in units of the second blocks having a smaller size than that of the current first block. | 2009-04-23 |
20090103621 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Described herein is an image processing apparatus for calculating a motion vector between two screen images including a target screen image and a reference screen image, including: a base face motion vector calculation section; a high-accuracy base face motion vector calculation section; a reduction face motion vector calculation section; a high-accuracy reduction face motion vector calculation section; first and second base face search range determination sections; and a selection section configured to select a calculation section to be used from among the base face motion vector calculation section, high-accuracy base face motion vector calculation section, reduction face motion vector calculation section and high-accuracy reduction face motion vector calculation section and select whether the first or second base face search range determination section should be used and then select, where use of any of the determination sections is determined, a determination section to be used from between the determination sections. | 2009-04-23 |
20090103622 | METHOD AND SYSTEM FOR DETERMINING A MACROBLOCK PARTITION FOR DATA TRANSCODING - A system and corresponding method determines a macroblock partition to transcode digital data from a first video standard to a second video standard with any spatial resolution. The system includes a processing module and an encoding module. The processing module processes digital data to determine a macroblock partition. The encoding module is coupled to the processing module for encoding the digital data based on the macroblock partition. The system is further coupled to a decoding module for receiving the digital data. The method determines the partition of a macroblock for transcoding digital data with any spatial resolution and without any motion estimation. | 2009-04-23 |
20090103623 | IMAGE INFORMATION ENCODING METHOD AND ENCODER, AND IMAGE INFORMATION DECODING METHOD AND DECODER - In an image information encoder ( | 2009-04-23 |
20090103624 | POLYMORPHIC CODEC SYSTEM AND METHOD - An input module obtains a media signal to be communicated to a destination system, after which an identification module identifies a plurality of segments within the media signal. A codec includes a selection module that automatically selects different compression methods to respectively compress at least two of the segments. The compression methods are automatically selected to produce a highest compression quality for the respective segments according to a set of criteria without exceeding a target data rate. A compression module within the codec then compresses the segments using the automatically-selected compression methods, after which an output module delivers the compressed segments to the destination system with an indication of which compression method was used to compress each segment. | 2009-04-23 |
20090103625 | VIDEO ENCODING APPARATUS AND METHOD USING PIPELINE TECHNIQUE WITH VARIABLE TIME SLOT - A video encoding apparatus and method using a pipeline technique with a variable time slot are provided. More particularly, a video encoding apparatus and method capable of shortening a video encoding time by variably adjusting lengths of time slots when an H.264 video encoding process is performed in a pipeline structure are provided. The video encoding apparatus includes a plurality of functional blocks that perform video encoding steps based on an H.264 standard for macroblocks configuring input digital video signals in a pipeline structure, and a controller that controls lengths of time slots configuring the pipeline structure based on done signals received from the plurality of functional blocks. Lengths of time slots can be adjusted according to operation times of video encoding steps using done signals generated from functional blocks, thereby preventing unnecessary power consumption and delays when using a fixed-length time slot. | 2009-04-23 |
20090103626 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103627 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103628 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103629 | SIGNAL COMPRESSING SYSTEM - A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient. | 2009-04-23 |
20090103630 | IMAGE PROCESSING DEVICE - An image processing device comprising: an imaging unit outputting frames of image data sequentially in order of imaging; a first generation unit generating first image data sequentially in units of a predetermined number of consecutive frames of image data, from the output frames of image data, wherein a total exposure time of each piece of first image data is a first time period; a second generation unit generating second image data sequentially in units of the predetermined number of consecutive frames, from the output frames of image data, a total exposure time of each piece of second image data is a second time period different from the first time period; and an output unit outputting each pair of first image data and second image data generated from a same set of the predetermined number of consecutive frames of image data, in correlation with each other. | 2009-04-23 |
20090103631 | DEVICE AND METHOD FOR UNIFIED CODES - A unified codec device and method are disclosed. A decoding device includes a decoding description decoder, generating at least one table by using inputted decoding description; and a codec unit, decoding and outputting encoded video data, included in an inputted bit-stream, to moving picture data by using the table. With the present invention, a bit-stream, encoded by various formats according to each standard (e.g. MPEG-1, MPEG-2, MPEG-4 and MPEG-4 AVC), can be decoded by the same information recognizing method. | 2009-04-23 |
20090103632 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD IN DIGITAL BROADCASTING SYSTEM - A receiving system and a data processing method for receiving and processing mobile service data are disclosed. The receiving system comprises a demodulating unit, a block decoder, a controller, and an RS frame decoder. The demodulating unit receives a broadcast signal including mobile service data and main service data and converts the received broadcast signal to a baseband broadcast signal. The mobile service data configure at least one of a primary RS frame and a secondary RS frame. The block decoder performs turbo decoding of a SCCC block unit for mobile service data within the baseband broadcast signal based on SCCC-related information. The controller generates a control signal for RS frame decoding with reference to at least one of SCCC block mode information, RS frame mode information, and user's input. The RS frame decoder configures at least one of a primary RS frame and a secondary RS frame using the mobile service data output from the block decoder in accordance with the control signal and performs error correction decoding for corresponding RS frame with reference to reliability information of each mobile service data byte within the configured RS frame. | 2009-04-23 |
20090103633 | DATA AIDED DETECTION OF SPECTRUM INVERSION - Methods and apparatuses to detect spectrum inversion based on estimated frequency offset in carrier signal. In one embodiment, a receiver includes an I/Q swap module to output an in-phase component and a quadrature-phase component; a frequency offset estimator to determine an offset in carry frequency of the in-phase and quadrature-phase components; and a spectrum inversion detector coupled to the frequency offset estimator and the I/Q swap module. The spectrum inversion detector is configured to signal the I/Q swap module to swap the in-phase component and the quadrature-phase component when an absolute value of the offset in carry frequency is above a predetermined threshold. | 2009-04-23 |
20090103634 | PROVIDING A VIDEO STREAM WITH ALTERNATE PACKET IDENTIFIERS - Methods and systems for the efficient and non-redundant transmission of a single video program in multiple frame rates, optionally employing a combination of video coding standards, in a way that is backwards-compatible with legacy receivers only supportive of some subsection of frame rates or of some subsection of video coding standards. | 2009-04-23 |
20090103635 | SYSTEM AND METHOD OF UNEQUAL ERROR PROTECTION WITH HYBRID ARQ/FEC FOR VIDEO STREAMING OVER WIRELESS LOCAL AREA NETWORKS - A transmitter system comprises an interface operative to receive compressed video data for a group of pictures, each picture containing picture subsets; a data prioritization engine operative to define a priority level of each picture subset, the priority level being based on a picture contribution value of the picture subset; and a packet generation engine operative to generate a group of message packets, the group containing at least a portion of the picture subsets belonging to a particular priority level, and operative to generate parity packets corresponding to the group of message packets, the number of parity packets being based on the particular priority level. The transmitter system may further comprise a hybrid ARQ/FEC engine operative to await an ACK in response to communication of the message and parity packets, and operative to send at least one additional parity packet if the ACK is not received within a timeout period. | 2009-04-23 |
20090103636 | Apparatus and Method for Decoding Low Density Parity Check Coded Signals - The disclosed embodiments relate to an apparatus and method for decoding signals in a receiver, such as signals using low density parity check error correction. The apparatus includes a link circuit. The link circuit may include a first memory, a first and second processing block, and also include a first shift circuit for shifting data before entering one of the processing blocks and a second shift circuit for reversing the first shift after exiting the processing block. The link circuit may also include a second memory used for intermediate storage and shared by the first and second processing block. The method includes reading data from a memory, shifting the data prior to processing, processing the data, and then reverse shifting the data prior to writing it back to the memory. | 2009-04-23 |
20090103637 | SELECTIVE CHROMINANCE DECIMATION FOR DIGITAL IMAGES - A method of decimation of a digital image, the digital image represented by a plurality of pixels, is claimed. In the pixel domain, the digital image is divided into a plurality of blocks. Certain ones of the blocks are selectively decimated based upon predetermined criteria. In an embodiment, the chrominance portions of a given pixel block are decimated. | 2009-04-23 |
20090103638 | Method and system for increasing transmission speed of wired or wireless signals while minimizing the bit error rate - A communication system is provided which offers increased transmission speed while maintaining a low bit error rate. At the transmitter, a digital input is entered and a microprocessor determines from a particular subset of pulse sequence codes a single sequence of pulse coefficients that corresponds to that particular digital input. The sequence of pulse coefficients are then multiplied by a pulse shape, modulate and transmitted. At the receiver, the modulated pulses are demodulated. The demodulated pulses are then, on a pulse by pulse basis, subtracted from each of the subset of pulse sequences with the absolute values of each pulse for each pulse sequence being summed. A comparator selects a sequence of pulse coefficients corresponding to the lowest summed value of a particular pulse sequence, which is then mapped to a digital signal which is the same digital signal as the digital input. | 2009-04-23 |
20090103639 | Peak to Average Power Ratio Reduction Apparatus and Method for a Wireless OFDM transmitter - An OFDM symbol comprises information subcarriers which carry the information to be transmitted, accompanied by edge subcarriers, which are selected to minimize the PAPR of the transmitted signal. The selection of edge subcarriers which minimizes PAPR enables either higher power transmission for the same information content, or lower power consumption for the same transmitted symbol power. | 2009-04-23 |
20090103640 | METHOD AND AN APPARATUS FOR TIMING CONTROL OF CHANNEL ESTIMATION - The present invention relates to a method and an apparatus for timing control of channel estimation. The method includes: sequentially shifting a channel estimation window in a power-delay profile in a specific time interval to obtain a plurality of candidate segments; sequentially calculating a metric corresponding to the candidate segments according to the delay paths and the channel power contained in the candidate segments; among the metrics, finding out an optimal segment with the maximum metric and deciding a timing of channel estimation based on the optimal segment. | 2009-04-23 |
20090103641 | MAXIMUM LIKELIHOOD DECODING METHOD, EQUIPMENT, AND RECEIVER - Provided is a maximum likelihood decoding method of separating and estimating multiple transmitted signals transmitted by multiple transmitter antennas from multiple received signals received by multiple receiver antennas, comprising: a first step of generating a channel matrix based on channel impulse responses corresponding to the received signals; a second step of dividing the generated channel matrix into multiple sub-matrices, of identifying parts of the received signals corresponding to the sub-matrices obtained through the division, and of transforming the sub-matrices obtained through the division, by using inverse matrices of the sub-matrices obtained through the division; a third step of applying QR decomposition to the transformed sub-matrices to obtain triangular matrices, and of transforming the received signals of the parts by using the obtained triangular matrices; and a fourth step of determining one combination candidate for the parts of the transmitted signals corresponding to the transformed received signals. | 2009-04-23 |
20090103642 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, CIRCUIT MODULE AND INTEGRATED CIRCUIT - In communication method for communicating via a transmission channel to which first communication apparatuses communicating based on a first communication system, second communication apparatuses communicating based on a second communication system, and third communication apparatuses communicating based on a third communication system are connected, a data transmission domain and a notification domain for notifying a data transmission within the data transmission domain are allocated to the first communication apparatuses, the second communication apparatuses, and the third communication apparatuses, respectively. In the communication method, notices of the data transmission for each of the first communication apparatuses, the second communication apparatuses and the third communication apparatuses are transmitted within the notification domain, and the data transmission domain is reallocated in accordance with the notices transmitted from the first, second and third communication apparatuses. | 2009-04-23 |
20090103643 | HUMAN BODY COMMUNICATION METHOD USING MULTI-CARRIER MODULATION METHOD - Provided is a human body communication method using a multi-carrier modulation method, in which users do not interfere with each other in an environment with several users, and stable communication is possible when users are exposed to strong interference generated at other electronic devices. Also, provided are a multi-carrier modulation method, in which data between communication devices connected to a human body used as a channel is divided into a plurality of sub-channels and the data is transmitted by loading it on each of a plurality of sub-carrier signals, and a multi-connection method using the multi-carrier modulation method. The plurality of sub-channels having a predetermined bandwidth include several sub-carriers, and by changing a modulation method applied to the sub-carriers, stable communication can be realized. | 2009-04-23 |
20090103644 | TRANSMITTING AND RECEIVING METHOD, AND RADIO APPARATUS UTILIZING THE SAME - A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the processing unit also transmits, from a plurality of antennas which includes antennas other than the antennas that transmit the data, known signals corresponding respectively to the plurality of antennas. | 2009-04-23 |
20090103645 | DIGITAL MOBILE COMMUNICATION SYSTEM AND TRANSMISSION/RECEPTION METHOD THEREOF - A radio communication system in which a transmission station performs window function processing on a transmission symbol to which cyclic prefixes have been attached for each specified number of samples, then transmits the signal, and a receiving station extracts and demodulates effective signal portions from the received signal, wherein the transmission station uses a control channel to notify the receiving station of window width N | 2009-04-23 |
20090103646 | Tiled-building-block trellis encoders - A first convolutional coder (building-block trellis coder) is used to establish a minimum squared Euclidian distance (MSED) between signal points within a coded constellation building block. A second convolutional encoder (tiling encoder) is designed to ensure that the building block's MSED is maintained between building blocks once they are tiled onto an integer lattice. When this approach is applied to the trellis code of the WiMAX standard, a 3 dB coding is realized. Recall that Wei's 16-state 4D code suffered from a 1.36 dB due to constellation expansion, resulting in a net 4.66 dB coding gain. Our building block approach recovers 1.33 dB of this loss with only a minor increase in coding complexity. We then use the building block approach to derive simpler and more powerful higher dimensional codes that provide further gains still over the Wei family of multidimensional codes. | 2009-04-23 |
20090103647 | DIGITAL BROADCASTING TRANSMISSION/RECEPTION SYSTEM CAPABLE OF IMPROVING RECEIVING AND EQUALIZING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the data stream into which stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver. | 2009-04-23 |
20090103648 | WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD IN MULTICARRIER COMMUNICATION - A base station apparatus wherein the interference suppression symbol combination can be performed in a case of using the repetition technique in a multicarrier communication. In a base station ( | 2009-04-23 |
20090103649 | Digital Broadcast Signaling Metadata - Embodiments are directed to transmitting L1 pre-signaling information with predetermined modulation and code rate such that L1 pre-signaling information can be received without preliminary knowledge on the network. L1 pre-signaling information makes it possible to receive the L1 signaling information, data link layer information, and notification data that may have configurable code rates and modulation. Therefore, L1 pre-signaling information can be thought of as signaling metadata (i.e., information about other signaling information). L1 signaling is divided into pre-signaling and signaling parts. The pre-signaling part includes parameters used for receiving the L1 signaling information. L1 pre-signaling signaling enables the receiver to receive the signaling itself (L1 signaling and data link layer information) by informing the receiver about the type of modulation, coding, and the like, used to transmit the L1 signaling, data link layer, and notification information. | 2009-04-23 |
20090103650 | METHOD FOR DIGITAL WIRELESS COMMUNICATIONS - In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established. | 2009-04-23 |
20090103651 | Digital Video Broadcast Service Discovery - Embodiments are directed to binary phase shift key modulating a first pilot symbol according to a reference sequence, and differentially binary phase shift key modulating a second pilot symbols. The original reference sequence and the delayed differentially modulated sequence are then combined before performing an Inverse Fast Fourier Transform and inserting a guard interval. Receiver operations are an inverse of the transmitter operations, which were just discussed. The receiver does not have to know the reference sequence. Embodiments are directed to specifying a plurality of seeds that are bit patterns each having r bits not all of which have a value of zero, extending the seeds into respective sequences by applying to each seed a recurrence formula; and using one of the sequences as a comb sequence and using the sequences other than the comb sequence as binary phase shift keying patterns. | 2009-04-23 |
20090103652 | SAMPLING RECEIVER - The switching operation of a high frequency switch connected in series downstream from the amplifier circuit produces a load variation on the amplifier circuit, and serially connecting the amplifier circuit and high frequency switch causes a drop in gain due to an in-band mismatch. An amplifier circuit is connected to the input pin for input a high frequency signal, and the output of the amplifier circuit branches to serially connected resistances. An RC filter composed of a resistance and a capacitance is parallel connected between the resistances and the downstream high frequency switches. Input pins for inputting a high frequency signal are connected to the gates of the high frequency switches. Capacitances are parallel connected downstream from the high frequency switches, forming a switched capacitor circuit connected to the output pins. | 2009-04-23 |
20090103653 | State metrics memory reduction in a turbo decoder implementation - Methods and apparatus are described for reducing memory storage cells in a turbo decoder by storing only half the state metrics generated during a scan process. States associated with each bit transmission may be divided into couples and only one state from every state couple may be stored. In one example embodiment, only the state metric for a losing state of every state couple is saved, along with a single bit, e.g., 1 or 0, indicating whether the upper state or lower state of the state couple was the winner. The winning state may be reconstituted at a later stage. In this manner, for a code rate ⅓ and constraint length 3 turbo code, instead of storing 8*10=80 bits of state metrics for each systematic bit, only (4*10)+(4*1)=44 bits of scan state metrics data need be stored, a savings of nearly 50% regardless of the transistor technology used. | 2009-04-23 |
20090103654 | LOW INTERMEDIATE FREQUENCY RECEIVER - One embodiment relates to a low intermediate frequency (IF) receiver. The low-IF receiver includes an analog front end that is configured to receive a modulated IQ data signal and provide an in-phase signal and a quadrature signal, where the in-phase signal is phase shifted by approximately 90° relative to the quadrature signal. The low-IF receiver further includes a digital processing block, and a single path that provides only one of the in-phase signal and the quadrature signal to the digital processing block. Other receivers and methods are also disclosed. | 2009-04-23 |
20090103655 | SIMPLIFIED DE-ROTATION IN DIGITAL FM DEMODULATOR ARCHITECTURES - The present invention relates to a digital receiver for FM signals, in particular to a new demodulator structure and demodulating method, by which according to a first aspect of the invention the usual complex de-rotation process is reduced to a simple addition/subtraction. According to a second aspect of the invention, the requirements for the sampling frequency necessary for processing the demodulator signals are reduced substantially. | 2009-04-23 |
20090103656 | CORRELATION DEVICE AND METHOD FOR DIFFERENT MODULATED SIGNALS - A correlation device and method for different modulated signals such as BPSK signal and BOC signal. According to the present invention, the correlation device has one or more sections. Each section comprises a correlation unit for executing correlation; a first signal path for passing a received signal directly to the correlation unit; a second signal path for transferring a BOC signal into a BPSK-like signal and passing the signal to the correlation unit. The correlation unit has a multiplexer for selecting to allow an output of one of the first and second signal paths to be subject to signal correlation. The correlation results of the respective sections can be combined. | 2009-04-23 |
20090103657 | DIGITAL BROADCASTING TRANSMISSION/RECEPTION SYSTEM CAPABLE OF IMPROVING RECEIVING AND EQUALIZING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitting and receiving system and a signal processing method thereof that improves the receiving performance of the system. A digital broadcast transmitter includes a randomizer to receive and randomize a data stream into a specified position of which stuff bytes are inserted, a replacement sequence generator to generate known data including a predefined sequence, a stuff-byte exchange unit to insert the known data into the specified position of the data stream into which stuff bytes are inserted, an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction, and a transmission unit to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. The digital broadcast receiving performance is improved even in an inferior multi-path channel by detecting the known data from the received transmission and using the known data for synchronization and equalization in a digital broadcast receiver. | 2009-04-23 |
20090103658 | DIGITAL BROADCAST TRANSMISSION AND RECEIVING SYSTEM HAVING AN IMPROVED RECEIVING PERFORMANCE AND SIGNAL PROCESSING METHOD THEREOF - A digital broadcast transmitter comprising: a randomizer to receive a data stream of which stuff bytes are inserted into a specified position and to randomize the received data stream; a stuff-byte exchange unit to generate known data having a predefined pattern and to insert the known data into the specified position of the data stream into which the stuff bytes are inserted; an encoder to encode the data stream output from the stuff-byte exchange unit for an error correction; and a modulator and RF converter to modulate the encoded data stream, RF-convert the modulated data stream and transmit the RF-converted data. | 2009-04-23 |