Class / Patent application number | Description | Number of patent applications / Date published |
704230000 | Quantization | 51 |
20080228476 | ENTROPY CODING BY ADAPTING CODING BETWEEN LEVEL AND RUN LENGTH/LEVEL MODES - An audio encoder performs adaptive entropy encoding of audio data. For example, an audio encoder switches between variable dimension vector Huffman coding of direct levels of quantized audio data and run-level coding of run lengths and levels of quantized audio data. The encoder can use, for example, context-based arithmetic coding for coding run lengths and levels. The encoder can determine when to switch between coding modes by counting consecutive coefficients having a predominant value (e.g., zero). An audio decoder performs corresponding adaptive entropy decoding. | 09-18-2008 |
20080312917 | METHOD AND APPARATUS FOR PREDICTIVELY QUANTIZING VOICED SPEECH - A method and apparatus for predictively quantizing voiced speech includes a parameter generator and a quantizer. The parameter generator is configured to extract parameters from frames of predictive speech such as voiced speech, and to transform the extracted information to a frequency-domain representation. The quantizer is configured to subtract a weighted sum of the parameters for previous frames from the parameter for the current frame. The quantizer is configured to quantize the difference value. A prototype extractor may be added to first extract a pitch period prototype to be processed by the parameter generator. | 12-18-2008 |
20090012784 | Speech transcoding in GSM networks - There is provided a method of transcoding an Enhance Full Rate (EFR) 12.2 Kbps encoded frame into an Adaptive Multi-Rate (AMR) 12.2 Kbps encoded frame, where the method comprises receiving the EFR 12.2 Kbps encoded frame from a first codec; determining if the EFR 12.2 Kbps encoded frame is a Silence Insertion Descriptor (SID) frame; if the EFR 12.2 Kbps encoded frame is determined to be the SID frame, the method further comprises transcoding the EFR SID frame. There is also provided a method of transcoding an EFR 12.2 Kbps encoded frame into an AMR 12.2 Kbps encoded frame, where the method comprises receiving the AMR 12.2 Kbps encoded frame from a first codec; determining if the AMR 12.2 Kbps encoded frame is an SID frame; if the AMR 12.2 Kbps encoded frame is determined to be the SID frame, the method further comprises transcoding the AMR SID frame. | 01-08-2009 |
20090030678 | Method for Binary Coding of Quantization Indices of a Signal Envelope, Method for Decoding a Signal Envelope and Corresponding Coding and Decoding Modules | 01-29-2009 |
20090043575 | Quantized Feature Index Trajectory - Indexing methods are described that may be used by databases, search engines, query and retrieval systems, context sensitive data mining, context mapping, language identification, image recognition, and robotic systems. Raw baseline features from an input signal are aggregated, abstracted and indexed for later retrieval or manipulation. The feature index is the quantization number for the underlying features that are represented by an abstraction. Trajectories are used to signify how the features evolve over time. Features indexes are linked in an ordered sequence indicative of time quanta, where the sequence represents the underlying input signal. An example indexing system based on the described processes is an inverted index that creates a mapping from features or atoms to the underlying documents, files, or data. A highly optimized set of operations can be used to manipulate the quantized feature indexes, where the operations can be fine tuned independent from the base feature set. | 02-12-2009 |
20090055172 | SOUND ENCODING DEVICE AND SOUND ENCODING METHOD - A sound encoding device for efficiently encoding stereophonic sound. In this sound encoding device, a prediction parameter analyzing section ( | 02-26-2009 |
20090132246 | METHOD AND APPARATUS FOR GENERATING FILL FRAMES FOR VOICE OVER INTERNET PROTOCOL (VoIP) APPLICATIONS - A method and apparatus that generates fill frames for Voice over Internet Protocol (VoIP) applications in a communication device is disclosed. The method may include determining if there is a lost frame in a received communication, wherein if it is determined that there is a lost frame, setting a frame loss flag and storing the frame loss flag in the frame loss history register, shifting a loss history register, a line spectral frequency (LSF) history register, a voicing cutoff (VCUT) history register, a pitch history register, and a root mean squared (RMS) gain history register, wherein the loss history register, the LSF history register, the VCUT history register, the pitch history register, and the RMS history register include at least three registers, the three registers being a newest, a middle and an oldest registers, reading the frame loss flag into a newest loss history register, determining contents of the middle register of each of the LSF history register, the VCUT history register, the pitch history register, and the RMS history register, and sending the contents of the middle registers to a synthesizer to generate an output speech signal. | 05-21-2009 |
20090132247 | SPEECH CODER AND SPEECH DECODER - A target vector is coded by multi-stage vector quantization. A first stage of the coding of the target vector uses a first code vector stored in a first codebook. A scalar associated with a code of each first code vector is stored. A third code vector is determined by multiplying a second code vector stored in a second codebook and the scalar together, performing distance calculation using the target vector, the first code vector and the third code vector, and performing a second stage of the coding of the target vector using a result of the distance calculation. | 05-21-2009 |
20090177467 | DETECTOR FOR USE IN VOICE COMMUNICATIONS SYSTEMS - One or more methods and systems of detecting or identifying one or more types of algorithms used in the encoding of a voice or speech waveform is presented. The system and method may be used as a testing tool to identify whether a voice data stream is encoded using a linear G.711, μ-law G.711, or A-law G.711 algorithm. The system and method are applied to a voice data stream to ensure that a codec with the appropriate algorithm is used to reproduce an audio waveform. | 07-09-2009 |
20090182558 | Selection of scalar quantixation (SQ) and vector quantization (VQ) for speech coding - In accordance with one aspect of the invention, a selector supports the selection of a first encoding scheme or the second encoding scheme based upon the detection or absence of the triggering characteristic in the interval of the input speech signal. The first encoding scheme has a pitch pre-processing procedure for processing the input speech signal to form a revised speech signal biased toward an ideal voiced and stationary characteristic. The pre-processing procedure allows the encoder to fully capture the benefits of a bandwidth-efficient, long-term predictive procedure for a greater amount of speech components of an input speech signal than would otherwise be possible. In accordance with another aspect of the invention, the second encoding scheme entails a long-term prediction mode for encoding the pitch on a sub-frame by sub-frame basis. The long-term prediction mode is tailored to where the generally periodic component of the speech is generally not stationary or less than completely periodic and requires greater frequency of updates from the adaptive codebook to achieve a desired perceptual quality of the reproduced speech under a long-term predictive procedure. | 07-16-2009 |
20090192794 | Digital filtering method, digital filtering equipment,digital filtering program, and recording medium and recorded device which are readable on computer - Included in the digital filtering equipment for extracting a feature quantity from a speech signal in order to execute a speech recognition based on an inputted speech signal are: a) an waveform determining section for obtaining an inputted speech signal and quantizing the speech signal waveform; b) a division value operating section for summing a quantized signal data in a prescribed adjoining region to divide the summation value by the number of summed data, with respect to a data quantized at each point by the waveform determining section, whereby a division value is obtained with the data being centered; c) a comparison section for comparing a division value calculated by the division value operating section and the quantized data calculated in the division value operating section to output logical truth of a comparison result, with respect to each data; and d) a conversion section for converting the quantized data into the selected data points based on an output from the comparison section. Thus, the feature quantity can be extracted only by applying an integer summation and comparison operation, so that performance of arithmetic operation is extremely simplified to be fast and inexpensive. | 07-30-2009 |
20090210222 | Multi-Channel Hole-Filling For Audio Compression - Multi-channel hole-filling for audio compression is disclosed. Channel dependency groups (CDGs) are explicitly extracted based on channel transform information. Holes are detected within each CDG for each bark, and a CDG hole is identified as requiring filling as a particular section of frequency bandwidth larger than a predetermined hole bandwidth threshold and with all zero-value coefficients in all channels after quantizing. Bark weights are adjusted by multiplying the original bark weights with one calculated scalar so as to remove each detected CDG hole. | 08-20-2009 |
20090259463 | Methods and Apparatus for Efficient Vocoder Implementations - Techniques for implementing vocoders in parallel digital signal processors are described. A preferred approach is implemented in conjunction with the BOPS® Manifold Array (ManArray™) processing architecture so that in an array of N parallel processing elements, N channels of voice communication are processed in parallel. Techniques for forcing vocoder processing of one dataframe to take the same number of cycles are described. Improved throughput and lower clock rates can be achieved. | 10-15-2009 |
20090292537 | WIDE-BAND ENCODING DEVICE, WIDE-BAND LSP PREDICTION DEVICE, BAND SCALABLE ENCODING DEVICE, WIDE-BAND ENCODING METHOD - There is provided a wide-band LSP prediction device and others capable of predicting a wide-band LSP from a narrow-band LSP with a high quantization efficiency and a high accuracy while suppressing the size of a conversion table correlating the narrow-band LSP to the wide-band LSP. In this device, a non-linear prediction unit ( | 11-26-2009 |
20090306978 | METHOD AND SYSTEM FOR ENCODING LANGUAGES - A method of encoding and decoding languages for international communication. A set of core words may be encoded, although the full vocabulary of the language might also be covered. The result is particularly suitable for use by people in relation to the keypad of a mobile phone, but may also be implemented in translation or communication software to create a language database for example. The encoding includes assigning digital symbols to selected words in the language, assigning alphanumeric representations to the digital symbols, and assigning pronounceable elements to the alphanumeric representations. | 12-10-2009 |
20090313011 | METHOD AND AN APPARATUS FOR IDENTIFYING FRAME TYPE - A method for identifying a frame type is disclosed. The present invention includes receiving current frame type information, obtaining previously received previous frame type information, generating frame identification information of a current frame using the current frame type information and the previous frame type information, and identifying the current frame using the frame identification information. | 12-17-2009 |
20090313012 | TELECONFERENCE TERMINAL APPARATUS, RELAYING APPARATUS, AND TELECONFERENCING SYSTEM - A teleconference terminal apparatus ( | 12-17-2009 |
20090319264 | SPEECH DECODING APPARATUS, SPEECH ENCODING APPARATUS, AND LOST FRAME CONCEALMENT METHOD - Disclosed is a sound decoding device capable of improving the lost frame compensation performance and improving quality of the decoded sound. In this device, a rise frame sound source compensation unit ( | 12-24-2009 |
20090326935 | METHOD OF TREATING VOICE INFORMATION - A method for compressing digital sound data in which method a sound signal is divided for encoding into temporal segments and the sound samples of a segment, which are originally presented by N | 12-31-2009 |
20100049512 | ENCODING DEVICE AND ENCODING METHOD - Disclosed is an encoding device and others capable of suppressing quantization distortion while suppressing increase of a bit rate when encoding audio or the like. In the device, a dynamic range calculation unit ( | 02-25-2010 |
20100063810 | Noise-Feedback for Spectral Envelope Quantization - A method of transmitting an input audio signal is disclosed. A current spectral magnitude of the input audio signal is quantized. A quantization error of a previous spectral magnitude is fed back to influence quantization of the current spectral magnitude. The feeding back includes adaptively modifying a quantization criterion to form a modified quantization criterion. A current quantization error is minimized by using the modified quantization criterion. A quantized spectral envelope is formed based on the minimizing and the quantized spectral envelope is transmitted. | 03-11-2010 |
20100063811 | Temporal Envelope Coding of Energy Attack Signal by Using Attack Point Location - A method of transceiving an audio signal is disclosed. An input audio signal is provided. It is determined whether an energy attack signal exists within the input audio signal and a decision flag is set if the energy attack signal exists. A temporal location of the energy attack point in the input audio signal is detected. Energy variations before and after the temporal location of an energy attack point are determined. The energy variations to produce quantized energy variations and a peak area energy of the input audio signal to produce a quantized peak area energy are quantized. The decision flag, the temporal location of the energy attack point, the quantized energy variations, and the quantized peak energy are transmitted. | 03-11-2010 |
20100063812 | Efficient Temporal Envelope Coding Approach by Prediction Between Low Band Signal and High Band Signal - This invention proposes a more efficient way to quantize temporal envelope shaping of high band signal by benefiting from energy relationship between low band signal and high band signal; if low band signal is well coded or it is coded with time domain codec such as CELP, temporal envelope shaping information of low band signal can be used to predict temporal envelope shaping of high band signal; the temporal envelope shaping prediction can bring significant saving of bits to precisely quantize temporal envelope shaping of high band signal. This prediction approach can be combined with other specific approach to further increase the efficiency and save mores bits. | 03-11-2010 |
20100094623 | ENCODING DEVICE AND ENCODING METHOD - Provided is an encoding device which performs a fixed sound source codebook search with a small calculation amount even in a low-bit rate sound encoding without lowering the encoding efficiency. In the encoding device, a threshold value calculation unit ( | 04-15-2010 |
20100106496 | ENCODING DEVICE AND ENCODING METHOD - Provided is an encoding device which can reduce the encoding distortion as compared to the conventional technique and can obtain a preferable sound quality for auditory sense. In the encoding device, a shape quantization unit ( | 04-29-2010 |
20100174541 | Quantization - A method, system and program for encoding speech. The method comprises: receiving an input signal representing a property of speech; quantizing the input signal, thus generating a quantized output signal; prior to the quantization, supplying a version of the input signal to a first noise shaping filter having a first set of filter coefficients, thus generating a first filtered signal based on that version of the input signal and the first set of filter coefficients; following the quantization, supplying a version of the quantized output signal to a second noise shaping filter having a second set of filter coefficients different than said first set, thus generating a second filter signal based on that version of the quantized output signal and the second set of filter coefficients; performing a noise shaping operation to control a frequency spectrum of a noise effect in the quantized output signal caused by the quantization, wherein the noise shaping operation is performed based on both the first and second filtered signals; and transmitting the quantised output signal in an encoded signal. | 07-08-2010 |
20100174542 | Speech coding - A method, system and program for encoding and/or decoding a speech signal. The method comprises: generating a first signal representing a property of an input speech signal; transforming the first signal using a simulated random-noise signal, thus producing a second signal; quantizing the second signal based on a plurality of discrete representation levels, thus generating quantization values for transmission in an encoded speech signal, and also generating a third signal being a quantized version of the second signal; and performing an inverse of the transformation on the third signal, thus generating a quantized output signal, wherein the generation of the first signal is based on feedback of the quantized output signal. The method further comprises controlling the transformation in dependence on a property of the first signal so as to vary the magnitude of a noise effect created by the transformation relative to the representation levels. | 07-08-2010 |
20110099009 | NETWORK/PEER ASSISTED SPEECH CODING - A communications network is used to transfer user attribute information about participants in a communication session to their respective communication terminals for storage and use thereon to configure a speech codec to operate in a speaker-dependent manner, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals. | 04-28-2011 |
20110125495 | QUANTIZER, ENCODER, AND THE METHODS THEREOF - Disclosed are a quantizer, encoder, and the methods thereof, wherein the computational load is reduced when the values related to the transform coefficients of the principal component analysis transform are quantized when a principal component analysis transform is applied to code stereo. A quantizer ( | 05-26-2011 |
20110144985 | Method for Transporting Low-Bit Rate Information - A method is presented that uses steganographic codeword(s) carried in a speech payload in such a way that (i) the steganographic codeword(s) survive compression and/or transcoding as the payload travels from a transmitter to a receiver across at least one diverse network, and (ii) the embedded steganographic codeword(s) do not degrade the perceived voice quality of the received signal below an acceptable level. The steganographic codewords are combined with a speech payload by summing the amplitude of a steganographic codeword to the amplitude of the speech payload at a relatively low steganographic-to-speech bit rate. Advantageously, the illustrative embodiment of the present invention enables (i) steganographic codewords to be decoded by a compliant receiver and applied accordingly, and (ii) legacy or non-compliant receivers to play the received speech payload with resultant voice quality that is acceptable to listeners even though the steganographic codeword(s) remain in the received speech payload. | 06-16-2011 |
20110257968 | APPARATUS FOR ENCODING/DECODING MULTICHANNEL SIGNAL AND METHOD THEREOF - Provided is an encoding/decoding apparatus and method of multi-channel signals. The encoding apparatus and method of multi-channel signals may encode phase information of the multi-channel signals using a quantization scheme and a lossless encoding scheme, and the decoding apparatus and method of multi-channel signals may decode the phase information using an inverse-quantization scheme and a lossless decoding scheme. | 10-20-2011 |
20120166189 | Speech Coding - A method of encoding one or more parent blocks of values, the number of values being the length of each block, the method comprising for each parent block:
| 06-28-2012 |
20120203548 | VECTOR QUANTISATION DEVICE AND VECTOR QUANTISATION METHOD - Disclosed is a vector quantisation device which can reduce the computational complexity of an audio codec without reducing the audio quality. A vector quantisation device ( | 08-09-2012 |
20120245931 | ENCODING DEVICE, DECODING DEVICE, AND METHODS THEREFOR - Disclosed is an encoding device that improves the quality of a decoded signal in a hierarchical coding (scalable coding) method, wherein a band to be quantized is selected for every level (layer). The encoding device ( | 09-27-2012 |
20130173263 | QUANTIZATION DEVICE AND QUANTIZATION METHOD - Provided are a quantization device and quantization method which reduce coding distortion with a small degree of calculation, and achieve adequate coding performance thereby. A multistage vector quantization unit ( | 07-04-2013 |
20130179161 | NETWORK/PEER ASSISTED SPEECH CODING - A communications network is used to transfer user attribute information about participants in a communication session to their respective communication terminals for storage and use thereon to configure a speech codec to operate in a speaker-dependent manner, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals. | 07-11-2013 |
20130268268 | ENCODING OF AN IMPROVEMENT STAGE IN A HIERARCHICAL ENCODER - A method and coding device are provided for coding a digital audio input signal in a hierarchical coder, which includes a core coding stage with B bits and at least one current improvement coding stage k, delivering quantization indices which are concatenated to form the indices of a preceding embedded coder. The method includes: obtaining possible quantization values for the current improvement stage k by determining absolute reconstruction levels of just the current stage k on the basis of the indices of the preceding embedded coder; and quantizing the input signal of the hierarchical coder having undergone or not a perceptual weighting processing, on the basis of the possible quantization values so as to form a scalar quantization index for the stage k and a quantized signal corresponding to one of the possible quantization values. | 10-10-2013 |
20130346074 | Verification of Extracted Data - Facts are extracted from speech and recorded in a document using codings. Each coding represents an extracted fact and includes a code and a datum. The code may represent a type of the extracted fact and the datum may represent a value of the extracted fact. The datum in a coding is rendered based on a specified feature of the coding. For example, the datum may be rendered as boldface text to indicate that the coding has been designated as an “allergy.” In this way, the specified feature of the coding (e.g., “allergy”-ness) is used to modify the manner in which the datum is rendered. A user inspects the rendering and provides, based on the rendering, an indication of whether the coding was accurately designated as having the specified feature. A record of the user's indication may be stored, such as within the coding itself. | 12-26-2013 |
20140052440 | CODING THROUGH COMBINATION OF CODE VECTORS - It is inter alia disclosed to determine a single code vector index based on combining at least two code vector indexes, each code vector index being associated with a code vector of a respective codebook. | 02-20-2014 |
20140129216 | MULTIPLE SCALE CODEBOOK SEARCH - It is inter alia disclosed to determine, for each set of basis code vectors of a plurality of sets of basis code vectors, a potential basis code vector for encoding an input vector, wherein each set of basis code vectors is associated with at least one scale representative of a plurality of scale representatives, and to determine a code vector for encoding the input vector from a subset of code vectors, said subset of code vectors comprising, for each determined potential basis code vector and each scale representative associated with the set of basis code vectors of the respective potential basis code vector, a code vector based on the respective potential basis code vector scaled by the respective scale representative. | 05-08-2014 |
20140142936 | SPEECH ENCODING UTILIZING INDEPENDENT MANIPULATION OF SIGNAL AND NOISE SPECTRUM - Some embodiments describe methods, programs, and systems for speech encoding. Among other things, a received input signal representing a property of speech is quantized to generate a quantized output signal. Prior to the quantization, a version of the input signal is supplied to a first noise shaping filter having a first set of filter coefficients effective to generate a first filtered signal. Following the quantization, the quantized output signal is supplied to a second noise shaping filter having a second set of filter coefficients, thus generating a second filtered signal. A noise shaping operation is performed to control a frequency spectrum of a noise effect in the quantized output signal caused by the quantization, wherein the noise shaping operation is based on both the first and second filtered signals. Finally, the quantised output signal is transmitted in an encoded signal. | 05-22-2014 |
20140163973 | Speech Coding by Quantizing with Random-Noise Signal - A method, system and program for encoding and/or decoding a speech signal. The method comprises: generating a first signal representing a property of an input speech signal; transforming the first signal using a simulated random-noise signal, thus producing a second signal; quantizing the second signal based on a plurality of discrete representation levels, thus generating quantization values for transmission in an encoded speech signal, and also generating a third signal being a quantized version of the second signal; and performing an inverse of the transformation on the third signal, thus generating a quantized output signal, wherein the generation of the first signal is based on feedback of the quantized output signal. The method further comprises controlling the transformation in dependence on a property of the first signal so as to vary the magnitude of a noise effect created by the transformation relative to the representation levels. | 06-12-2014 |
20140236591 | METHOD AND SYSTEM FOR AUTOMATIC SPEECH RECOGNITION - A method of recognizing speech is provided that includes generating a decoding network that includes a primary sub-network and a classification sub-network. The primary sub-network includes a classification node corresponding to the classification sub-network. The classification sub-network corresponds to a group of uncommon words. A speech input is received and decoded by instantiating a token in the primary sub-network and passing the token through the primary network. When the token reaches the classification node, the method includes transferring the token to the classification sub-network and passing the token through the classification sub-network. When the token reaches an accept node of the classification sub-network, the method includes returning a result of the token passing through the classification sub-network to the primary sub-network. The result includes one or more words in the group of uncommon words. A string corresponding to the speech input is output that includes the one or more words. | 08-21-2014 |
20150025879 | AUDIO AND SPEECH CODING DEVICE, AUDIO AND SPEECH DECODING DEVICE, METHOD FOR CODING AUDIO AND SPEECH, AND METHOD FOR DECODING AUDIO AND SPEECH - This invention introduces audio/speech encoding apparatus audio/speech decoding apparatus, audio/speech encoding method and audio/speech decoding method to efficiently encode the quantization parameters of split multi-rate lattice vector quantization. In this invention, the position of the sub-vector whose codebook indication consumes the most bits is firstly located, and then the value of the codebook is estimated based on the total number of bits available and the bits usage information for other sub-vectors. The difference value is calculated between the actual value and estimated value. Finally, instead of transmitting the codebook indication which consumes the most bits, the position of the sub-vector whose codebook indication consumes the most bits and the difference value between the actual value and the estimated value are transmitted. By applying of the invented method, bits can be saved by the codebook indications. | 01-22-2015 |
20150051907 | VECTOR QUANTIZER - Vector Quantizer and method therein for efficient vector quantization, e.g. in a transform audio codec. The method comprises comparing an input target vector s with a plurality of centroids, each centroid representing a respective class of codevectors in a codebook. Further, a starting point for a search related to the input target vector in the codebook is determined, based on the result of the comparison. The codevectors in the codebook are sorted according to a distortion measure reflecting the distance between each codevector and the centroids of the classes. The Vector Quantizer and method enables that the class of codevectors comprising the most probable candidate codevectors in regard of the input vector. s may be searched first. | 02-19-2015 |
20150073785 | METHOD FOR VOICEMAIL QUALITY DETECTION - A system and method for speech quality detection is included. The method may include receiving, at a computing device, a first speech signal associated with a particular user. The method may include extracting one or more short-term features from the first speech signal wherein extracting short-term features includes extracting a time frame of between 10-50 ms. The method may also include determining one or more statistics of each of the one or more short-term features from the first speech signal. The method may further include classifying the one or more statistics as belonging to one of a set of quality classes. | 03-12-2015 |
20150149161 | Method and Arrangement for Scalable Low-Complexity Coding/Decoding - In a quantization method for quantizing a received excitation signal in a communication system performing the steps of re-shuffling S | 05-28-2015 |
20160027449 | PYRAMID VECTOR QUANTIZER SHAPE SEARCH - An encoder and a method therein for Pyramid Vector Quantizer, PVQ, shape search, the PVQ taking a target vector x as input and deriving a vector y by iteratively adding unit pulses in an inner dimension search loop. The method comprises, before entering a next inner dimension search loop for unit pulse addition, determining, based on the maximum pulse amplitude, maxamp | 01-28-2016 |
20160042744 | ADVANCED QUANTIZER - The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A quantization unit ( | 02-11-2016 |
20160148619 | METHOD OF PACKET LOSS CONCEALMENT IN ADPCM CODEC AND ADPCM DECODER WITH PLC CIRCUIT - A method of packet loss concealment in an adaptive differential pulse-code modulation (ADPCM) codec with a packet loss compensation (PLC) circuit is provided. The method provides a predetermined transition period between a correct signal (x | 05-26-2016 |
20170238208 | NON-UNIFORM PARAMETER QUANTIZATION FOR ADVANCED COUPLING | 08-17-2017 |