Patents
Sitemap › G10 - Musical instruments; Acoustics › G10L - Speech analysis or synthesis; Speech recognition; Speech or voice processing; Speech or audio coding or decoding › G10L 19 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
Patents for G10L 19 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (31,960)
12/1996
12/03/1996US5581656 Methods for generating the voiced portion of speech signals
12/03/1996US5581654 Method and apparatus for information encoding and decoding
12/03/1996US5581652 Reconstruction of wideband speech from narrowband speech using codebooks
12/03/1996US5581651 Speech signal decoding apparatus and method therefor
12/03/1996CA2084323C Speech signal encoding system capable of transmitting a speech signal at a low bit rate
11/1996
11/28/1996WO1996037964A1 Sound decoding device
11/27/1996EP0744751A2 Smart tray for audio player
11/27/1996EP0744069A1 Burst excited linear prediction
11/27/1996EP0413391B1 Speech coding system and a method of encoding speech
11/27/1996CN1136850A Process, device and systems for determing a masking level for a subband in a subband audio encoder
11/26/1996US5579437 Pitch epoch synchronous linear predictive coding vocoder and method
11/26/1996US5579435 Discriminating between stationary and non-stationary signals
11/26/1996US5579434 Speech signal bandwidth compression and expansion apparatus, and bandwidth compressing speech signal transmission method, and reproducing method
11/26/1996US5579433 Digital coding of speech signals using analysis filtering and synthesis filtering
11/20/1996EP0743773A2 Timing recovery scheme for packet speech in multiplexing environment of voice with data applications
11/20/1996EP0743634A1 Method of adapting the noise masking level in an analysis-by-synthesis speech coder employing a short-term perceptual weighting filter
11/20/1996EP0743633A2 Speech reproducing device capable of reproducing long-time speech with reduced memory
11/20/1996CN1136374A Transmitter-receiver
11/20/1996CN1136235A Digital audio signal coding and/or decoding method
11/19/1996US5577160 Speech analysis apparatus for extracting glottal source parameters and formant parameters
11/19/1996US5577159 Time-frequency interpolation with application to low rate speech coding
11/19/1996US5577041 Method of controlling a personal communication system
11/14/1996WO1996036163A2 Steganography systems
11/13/1996EP0742548A2 Speech coding apparatus and method using a filter for enhancing signal quality
11/13/1996EP0422232B1 Voice encoder
11/12/1996US5574825 Linear prediction coefficient generation during frame erasure or packet loss
11/12/1996US5574823 Frequency selective harmonic coding
11/12/1996US5574725 Communication method between a personal computer and communication module
11/07/1996WO1996035208A1 A gain quantization method in analysis-by-synthesis linear predictive speech coding
11/05/1996US5572677 Method and apparatus for conversing over a network
11/05/1996US5572622 Rejected frame concealment
10/1996
10/31/1996WO1996034383A1 Method and apparatus for low rate coding and decoding
10/31/1996WO1996034382A1 Methods and apparatus for distinguishing speech intervals from noise intervals in audio signals
10/31/1996CA2191972A1 Method and apparatus for low rate coding and decoding
10/30/1996EP0740428A1 Tonality for perceptual audio compression based on loudness uncertainty
10/30/1996EP0739569A1 System and method for transmitting picture or sound signals
10/30/1996CN1134581A Error hiding method and its apparatus for audible signal
10/29/1996US5570454 Method for processing speech signals as block floating point numbers in a CELP-based coder using a fixed point processor
10/29/1996US5570453 Method for generating a spectral noise weighting filter for use in a speech coder
10/29/1996US5570308 Method of processing digital audio signals of different sampling rates
10/29/1996CA2068041C Fast algorithm for deriving acoustic prototypes for automatic speech recognition
10/29/1996CA2061830C Speech coding system
10/29/1996CA2061803C Speech coding method and system
10/23/1996CN1134215A Method of facilitating audio source change in digital radio communication system
10/22/1996US5568588 Multi-pulse analysis speech processing System and method
10/22/1996US5568514 Signal quantizer with reduced output fluctuation
10/17/1996WO1996032823A1 Transcoder with prevention of tandem coding of speech
10/17/1996WO1996032713A1 A method of coding an excitation pulse parameter sequence
10/17/1996WO1996032712A1 A method to determine the excitation pulse positions within a speech frame
10/17/1996WO1996032711A1 Waveform speech synthesis
10/17/1996WO1996032710A1 System for compression and decompression of audio signals for digital transmission
10/16/1996EP0737959A1 Coded data decoding device and video/audio multiplexed data decoding device using it
10/16/1996EP0737387A1 Identification/authentication coding method and apparatus
10/16/1996EP0737350A1 System and method for performing voice compression
10/15/1996US5566167 Subband echo canceler
10/15/1996US5566103 Optical system having an analog image memory, an analog refresh circuit, and analog converters
10/15/1996CA2070603C Speech coders based on analysis-by-synthesis techniques
10/10/1996WO1996031952A1 Data transmission system, data recording and reproducing apparatus and recording medium each having data structure of error correcting code
10/10/1996WO1996031873A1 Predictive split-matrix quantization of spectral parameters for efficient coding of speech
10/10/1996WO1996027183A3 Processing speech coding parameters in a telecommunication system
10/09/1996EP0736996A2 Method of and apparatus for transmitting voice messages in a multiuser interactive virtual environment
10/09/1996EP0736858A2 Mobile communication equipment
10/09/1996EP0736211A1 Distributed voice recognition system
10/09/1996CN1132988A Voice activity detection driven noise remediator
10/09/1996CN1132972A Linear prediction filter coefficient quantizer and filter set
10/08/1996US5563913 For processing an input digital signal
10/08/1996US5563719 Data recording/replay device and data recording medium
10/06/1996CA2173399A1 Mobile communication equipment
10/03/1996WO1996031042A1 Communication package with apparatus and method for storing and retrieving a permanent message
10/03/1996WO1996030894A1 Method and apparatus for efficient implementation of single-sideband filter banks providing accurate measures of spectral magnitude and phase
10/03/1996WO1996024926A3 Method and apparatus in coding digital information
10/02/1996EP0734617A1 Transmission system utilizing different coding principles
10/02/1996CN1132423A Code exciting lnear predict coder and decoder
10/01/1996US5561688 For compressing a stream of coded digital data samples
10/01/1996US5561609 Transmission system with reconstruction of missing signal samples
09/1996
09/26/1996WO1996029696A1 Analysis-by-synthesis linear predictive speech coder
09/25/1996EP0734014A1 Coding apparatus
09/25/1996EP0734013A2 Determination of an excitation vector in a CELP coder
09/25/1996EP0734012A2 Signal discrimination circuit
09/25/1996EP0733257A1 Adaptive speech coder having code excited linear prediction with multiple codebook searches
09/25/1996EP0643886B1 Dynamic loader
09/25/1996CN1131994A Method and apparatus for preforming reducer rate variable rate vocoding
09/25/1996CN1131854A Digital audio data phase shifting apparatus
09/24/1996US5559881 Network echo canceller
09/24/1996US5559834 Method of reducing crosstalk in processing of acoustic or optical signals
09/24/1996US5559832 Method and apparatus for maintaining convergence within an ADPCM communication system during discontinuous transmission
09/24/1996US5559793 Echo cancellation system and method
09/19/1996WO1996028810A1 Depth-first algebraic-codebook search for fast coding of speech
09/19/1996WO1996028809A1 Arrangement and method relating to speech transmission and a telecommunications system comprising such arrangement
09/19/1996DE19609170A1 Verfahren zur Durchführung einer "Tiefe-Zuerst"-Suche in einem Codebuch zur Codierung eines Geräusch- bzw. Klangsignals, Vorrichtung zur Durchführung dieses Verfahrens sowie zellulares Kommunikationssystem mit einer derartigen Vorrichtung A method for performing a "depth-first" search in a codebook for coding a noise or tone signal, apparatus for performing this method as well as cellular communication system with such a device
09/19/1996DE19509149A1 Audio signal coding for data compression factor
09/18/1996EP0732686A2 Low-delay code-excited linear-predictive coding of wideband speech at 32kbits/sec
09/18/1996CN1131473A Method and apparatus for selecting encoding rate in variable rate vocoder
09/17/1996US5557705 Low bit rate speech signal transmitting system using an analyzer and synthesizer
09/17/1996CA2057384C System for embedded coding of speech signals
09/17/1996CA2037899C Digital speech coder having improved long-term predictor
09/17/1996CA2032520C Excitation pulse positioning method in a linear predictive speech coder
09/12/1996WO1996027869A1 Voice-band compression system
09/12/1996CA2211402A1 Voice-band compression system
09/11/1996EP0731449A2 Method for the modification of PLC coefficients of acoustic signals
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