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)
01/1995
01/17/1995	US5383202 Simplified method of attenuation of logarithmically coded digital signals
01/12/1995	WO1995001680A1 Digital signal encoding device, its decoding device, and its recording medium
01/12/1995	WO1995001634A1 Method and apparatus for reducing an undesirable characteristic of a spectral estimate of a noise signal between occurrences of voice signals
01/12/1995	WO1995001633A1 Method and apparatus for encoding digital signals, method and apparatus for decoding the coded signals, and medium for recording the coded signals
01/11/1995	EP0632940A1 Data compression process during storage and/or transmissioin of digital audio signals for studio applications with perceptive coding and variable length code
01/10/1995	US5381143 Digital signal coding/decoding apparatus, digital signal coding apparatus, and digital signal decoding apparatus
01/10/1995	CA1333940C Adaptive transform coder
01/08/1995	CA2214584A1 Speech signal encoding system capable of transmitting a speech signal at a low bit rate without carrying out a large volume of calculation
01/08/1995	CA2214582A1 Speech signal encoding system capable of transmitting a speech signal at a low bit rate without carrying out a large volume of calculation
01/04/1995	EP0632429A2 Vector quantizer
01/03/1995	US5379356 Decompression processor for video applications
12/1994
12/28/1994	EP0631274A2 CELP codec
12/28/1994	EP0447495B1 Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio
12/27/1994	US5377301 Technique for modifying reference vector quantized speech feature signals
12/27/1994	US5377272 Switched signal processing circuit
12/22/1994	WO1994029982A1 A speech decoding method and a speech decoder
12/22/1994	WO1994029965A1 Code excitation linear prediction encoder and decoder
12/22/1994	WO1994029851A1 Transmission error concealment
12/22/1994	WO1994029850A1 Lost frame concealment
12/22/1994	WO1994029849A1 Rejected frame concealment
12/22/1994	DE4340387C1 Method for the encoded transmission of voice (speech) signals
12/22/1994	CA2140365A1 Transmission error concealment
12/22/1994	CA2140364A1 Rejected frame concealment
12/22/1994	CA2140363A1 Lost frame concealment
12/21/1994	EP0630141A2 Computer-based multifunction personal communications system
12/21/1994	CN1096619A Intensity-stereo encoding and decoding in a transmission system
12/21/1994	CN1096618A Digital transmission system for transmitting an additional signal such as a surround signal
12/14/1994	EP0628947A1 Method and device for speech signal pitch period estimation and classification in digital speech coders
12/14/1994	EP0628946A1 Method of and device for quantizing spectral parameters in digital speech coders
12/14/1994	EP0628195A1 Method and apparatus for encoding, decoding and compression of audio-type data
12/08/1994	WO1994028679A1 An integrated video and audio signal distribution system for use on commercial aircraft and other vehicles
12/08/1994	WO1994028633A1 Apparatus and method for coding or decoding signals, and recording medium
12/07/1994	EP0627725A2 Pitch period synchronous LPC-vocoder
12/06/1994	US5371853 Method and system for CELP speech coding and codebook for use therewith
12/06/1994	CA1333425C Communication system capable of improving a speech quality by classifying speech signals
11/1994
11/30/1994	EP0626675A1 Excitation synchronous time encoding vocoder and method
11/30/1994	EP0626674A1 A method and apparatus for speech encoding, speech decoding and speech post processing
11/29/1994	US5369724 Method and apparatus for encoding, decoding and compression of audio-type data using reference coefficients located within a band of coefficients
11/29/1994	US5369469 Voice of the customer acquistion system
11/29/1994	CA2123188A1 Pitch epoch synchronous linear predictive coding vocoder and method
11/29/1994	CA2123187A1 Excitation synchronous time encoding vocoder and method
11/24/1994	WO1994027399A2 Telecom adapter for interfacing computing devices to the analog telephone network
11/24/1994	WO1994027286A1 Process for vector quantization, especially of voice signals
11/24/1994	WO1994027285A1 Vector coding process, especially for voice signals
11/24/1994	WO1994027284A1 Process for conditioning data, especially coded voice signal parameters
11/24/1994	CA2161018A1 Telecom adapter for interfacing computing devices to the analog telephone network
11/17/1994	EP0624291A1 Error protection in a subband coder.
11/17/1994	EP0624275A1 Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors
11/17/1994	EP0405548B1 System for speech coding and apparatus for the same
11/10/1994	WO1994025961A1 Transmission system comprising at least a coder
11/10/1994	WO1994025960A1 Transmission system comprising at least a coder
11/10/1994	WO1994025959A1 Use of an auditory model to improve quality or lower the bit rate of speech synthesis systems
11/10/1994	DE4331376C1 Method for determining the type of encoding to selected for the encoding of at least two signals
11/09/1994	EP0623916A1 A method and apparatus for implementing a long-term synthesis filter
11/08/1994	CA1332982C Coding of acoustic waveforms
11/02/1994	EP0392517B1 Speech coding apparatus
11/01/1994	US5361323 Signal encoding device
10/1994
10/27/1994	WO1994024667A1 Apparatus for recording and reproducing voice
10/25/1994	US5359696 Digital speech coder having improved sub-sample resolution long-term predictor
10/24/1994	CA2094780A1 Transform coded excitation for speech and audio coding
10/19/1994	CN1026275C Digital speech coder having improved long-term predictor
10/18/1994	US5357595 Sound recording and reproducing apparatus for detecting and compensating for recorded periods of silence during replay
10/18/1994	US5357594 Encoding and decoding using specially designed pairs of analysis and synthesis windows
10/18/1994	US5357513 Transmission power level adjustment in radio telephony
10/18/1994	CA2020084C Voice coding/decoding system having selected coders and entropy coders
10/13/1994	WO1994023426A1 Vector quantizer method and apparatus
10/12/1994	EP0619574A1 Speech coder employing analysis-by-synthesis techniques with a pulse excitation
10/11/1994	US5355430 Method for encoding and decoding a human speech signal by using a set of parameters
10/11/1994	CA2026441C Method for transmitting a signal
10/10/1994	CA2120902A1 Speech coder employing analysis-by-synthesis techniques with a pulse excitation
10/05/1994	EP0617865A1 Embedded signalling
10/04/1994	US5353374 Method for processing an audio signal
10/04/1994	US5353373 System for embedded coding of speech signals
09/1994
09/27/1994	US5351338 Time variable spectral analysis based on interpolation for speech coding
09/21/1994	EP0616315A1 Digital speech coding and decoding device, process for scanning a pseudo-logarithmic LTP codebook and process of LTP analysis
09/21/1994	EP0615674A1 Network echo canceller
09/21/1994	EP0470110B1 Signal-processing system for digital signals
09/15/1994	WO1994020951A1 Credit card size audio record and playback device
09/15/1994	DE4307905A1 Method for the storage and reproduction of an audio signal
09/15/1994	CA2156832A1 Credit card size audio record and playback device
09/14/1994	EP0615397A2 Noise suppression circuit for radio transceiver microphone
09/14/1994	EP0615349A2 Methods and apparatus for recording, reproducing, transmitting and/or receiving compressed data and recording medium therefor
09/14/1994	EP0615227A2 Speech coding apparatus using acoustic prototype vectors
09/13/1994	US5347305 Video telephone system
09/12/1994	CA2118767A1 Radio transceiver
09/07/1994	EP0614075A2 Method for speech coding using Trellis Coded Quantization for Linear Predictive Coding quantization
09/01/1994	WO1994019886A1 Digital dictation system with protection against unauthorised listening-in
09/01/1994	WO1994019792A1 Sound analysis and resynthesis using correlograms
09/01/1994	WO1994019791A1 Improved filter for use in audio compression and decompression systems
09/01/1994	WO1994019790A1 Method for generating a spectral noise weighting filter for use in a speech coder
08/1994
08/30/1994	US5343420 Signal discrimination circuit
08/25/1994	DE4325354C1 Method and arrangement for outputting digital speech signals
08/24/1994	EP0612160A2 A bit allocation method for transform coder
08/24/1994	EP0612158A1 A block size determination method of a transform coder
08/23/1994	US5341456 Method for determining speech encoding rate in a variable rate vocoder
08/18/1994	WO1994018668A1 A method of transmitting and receiving coded speech
08/17/1994	EP0610975A2 Coded signal formatting for encoder and decoder of high-quality audio
08/17/1994	EP0610906A1 Device for encoding speech spectrum parameters with a smallest possible number of bits
08/17/1994	EP0390975B1 Encoder Device capable of improving the speech quality by a pair of pulse producing units
08/17/1994	EP0361432B1 Method of and device for speech signal coding and decoding by means of a multipulse excitation

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