| 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) |
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| 08/16/1994 | US5339384 Code-excited linear predictive coding with low delay for speech or audio signals |
| 08/16/1994 | US5339275 Analog memory system |
| 08/04/1994 | WO1994017518A1 Text-to-speech system using vector quantization based speech encoding/decoding |
| 08/04/1994 | WO1994017492A1 Apparatus and method for compressing information |
| 08/03/1994 | EP0608281A1 Process for reducing frequency interlacing during acoustic or optical signal transmission and/or recording. |
| 08/02/1994 | CA2044351C Fast calculation apparatus for carrying out a forward and an inverse transform |
| 08/02/1994 | CA1331222C Audio pre-processing methods and apparatus |
| 08/02/1994 | CA1331221C Method and system for transmitting variable rate speech signal |
| 07/28/1994 | DE3629434C2 Digitales Codierverfahren Digital coding |
| 07/27/1994 | EP0608174A1 System for predictive encoding/decoding of a digital speech signal by an adaptive transform with embedded codes |
| 07/27/1994 | EP0607989A2 Voice coder system |
| 07/26/1994 | US5333236 Speech recognizer having a speech coder for an acoustic match based on context-dependent speech-transition acoustic models |
| 07/21/1994 | WO1994016436A1 A rapid tree-based method for vector quantization |
| 07/20/1994 | EP0337636B1 Harmonic speech coding arrangement |
| 07/19/1994 | CA2015274C Speech coding apparatus |
| 07/12/1994 | US5329550 Signal processing circuit for the European digital cellular radio system |
| 07/06/1994 | EP0605348A2 Method and system for speech data compression and regeneration |
| 07/05/1994 | US5327520 Method of use of voice message coder/decoder |
| 07/05/1994 | US5327519 Pulse pattern excited linear prediction voice coder |
| 07/05/1994 | US5327518 Audio analysis/synthesis system |
| 06/29/1994 | EP0603854A2 Speech decoder |
| 06/28/1994 | US5325463 IC card with built-in voice synthesizing function |
| 06/28/1994 | US5325461 Speech signal coding and decoding system transmitting allowance range information |
| 06/22/1994 | EP0602954A2 System for search of a codebook in a speech encoder |
| 06/22/1994 | EP0602826A2 Time shifting for analysis-by-synthesis coding |
| 06/22/1994 | EP0602224A1 Time variable spectral analysis based on interpolation for speech coding |
| 06/21/1994 | US5323486 Speech coding system having codebook storing differential vectors between each two adjoining code vectors |
| 06/21/1994 | US5323396 Digital transmission system, transmitter and receiver for use in the transmission system |
| 06/21/1994 | US5323154 Data compressing and expanding apparatus |
| 06/14/1994 | US5321794 Voice synthesizing apparatus and method and apparatus and method used as part of a voice synthesizing apparatus and method |
| 06/14/1994 | US5321793 Low-delay audio signal coder, using analysis-by-synthesis techniques |
| 06/14/1994 | CA2031006C Near-toll quality 4.8 kbps speech codec |
| 06/09/1994 | WO1994012972A1 Method and apparatus for quantization of harmonic amplitudes |
| 06/09/1994 | WO1994012932A1 Coding with modulation, error control, weighting, and bit allocation |
| 06/08/1994 | EP0600642A2 Method and apparatus for reducing correlated errors in subband coding systems with quantizers |
| 06/08/1994 | EP0600504A1 Method of and device for speech-coding based on analysis-by-synthesis techniques |
| 06/07/1994 | US5319735 Embedded signalling |
| 06/01/1994 | EP0599825A2 Digital transmission system for transmitting an additional signal such as a surround signal |
| 06/01/1994 | EP0599824A2 Intensity-stereo encoding and decoding in a transmission system |
| 06/01/1994 | EP0599664A2 Voice encoder and method of voice encoding |
| 06/01/1994 | EP0599569A2 A method of coding a speech signal |
| 06/01/1994 | EP0599315A2 Apparatus and method for orthogonally transforming a digital information signal with scale down to prevent processing overflow |
| 05/31/1994 | US5317672 Variable bit rate speech encoder |
| 05/31/1994 | CA2022677C Vector quantization encoder and vector quantization decoder |
| 05/31/1994 | CA2019804C Gain-shape vector quantization apparatus |
| 05/31/1994 | CA2019801C System for speech coding and an apparatus for the same |
| 05/18/1994 | EP0597649A2 High efficiency coding method and apparatus |
| 05/18/1994 | EP0597126A1 Method for compressing sound information and apparatus for reproducing sound information |
| 05/17/1994 | US5313554 Backward gain adaptation method in code excited linear prediction coders |
| 05/17/1994 | US5313552 Apparatus for quantizing an input group of data samples into one of N quantized groups of data via a process on less than N/2 reference groups of data samples |
| 05/11/1994 | WO1994010682A1 Method of encoding speech |
| 05/11/1994 | EP0596847A2 An adaptive pitch pulse enhancer and method for use in a codebook excited linear prediction (CELP) search loop |
| 05/11/1994 | EP0596785A1 Method for the discrimination of speech in presence of ambient noise and low bit-rate vocoder to implement the method |
| 05/11/1994 | EP0596663A2 A high efficiency encoding device and a noise spectrum modifying device and method |
| 05/04/1994 | EP0595483A1 Methods and apparatus for automatic switching between transmission of a spectrally redundant outgoing signal and reception of an incoming signal |
| 05/04/1994 | EP0347307B1 Coding method and linear prediction speech coder |
| 05/03/1994 | CA2108623A1 Adaptive pitch pulse enhancer and method for use in a codebook excited linear prediction (celp) search loop |
| 05/03/1994 | CA2021508C Digital speech coder having improved long term lag parameter determination |
| 05/03/1994 | CA2014643C Speech coding and decoding apparatus |
| 05/03/1994 | CA1329274C Encoder / decoder apparatus |
| 05/01/1994 | CA2102018A1 Methods and apparatus for automatic switching between transmission of a spectrally redundant outgoing signal and reception of an incoming signal |
| 04/26/1994 | US5307460 Method and apparatus for determining the excitation signal in VSELP coders |
| 04/26/1994 | US5307441 Wear-toll quality 4.8 kbps speech codec |
| 04/26/1994 | US5307405 Network echo canceller |
| 04/20/1994 | EP0593255A1 An arrangement for demodulating speech signals discontinuously transmitted from a mobile unit |
| 04/20/1994 | CN1085705A Network echo canceller |
| 04/19/1994 | US5305421 Low bit rate speech coding system and compression |
| 04/19/1994 | US5305332 Speech decoder for high quality reproduced speech through interpolation |
| 04/19/1994 | CA1328694C Encoder of a multi-pulse type capable of optimizing the number of excitation pulses and quantization level |
| 04/14/1994 | WO1994008418A1 Network echo canceller |
| 04/13/1994 | EP0592151A1 Time-frequency interpolation with application to low rate speech coding |
| 04/13/1994 | EP0592104A2 Coding and decoding of digital signals |
| 04/13/1994 | EP0591441A1 An improved multiband programmable compression system |
| 04/13/1994 | CN1085375A Switched signal processing circuit |
| 04/12/1994 | US5303346 Method of coding 32-kb/s audio signals |
| 04/12/1994 | CA1328509C Linear predictive speech analysis-synthesis apparatus |
| 04/06/1994 | EP0590155A1 High-efficiency encoding method |
| 04/05/1994 | US5301255 Audio signal subband encoder |
| 03/31/1994 | WO1994007313A1 Speech codec |
| 03/31/1994 | WO1994007239A1 Speech encoding method and apparatus |
| 03/31/1994 | WO1994007237A1 Audio compression system employing multi-rate signal analysis |
| 03/30/1994 | EP0589140A2 Bit allocation method in subband coding |
| 03/30/1994 | EP0588932A1 Variable rate vocoder |
| 03/30/1994 | EP0260053B1 Digital speech vocoder |
| 03/29/1994 | US5299282 Random tone or voice message synthesizer circuit |
| 03/29/1994 | US5299281 Method and apparatus for converting a digital speech signal into linear prediction coding parameters and control code signals and retrieving the digital speech signal therefrom |
| 03/29/1994 | US5299198 Method and apparatus for exploitation of voice inactivity to increase the capacity of a time division multiple access radio communications system |
| 03/29/1994 | CA2014279C Speech coding apparatus |
| 03/24/1994 | DE4305960C1 Digital dictation system with protection device against unauthorised listening - contains memory cards with stored codes accessible only by internal comparators controlling access to stored information |
| 03/23/1994 | EP0587733A1 Low computational-complexity digital filter bank. |
| 03/23/1994 | EP0401452B1 Low-delay low-bit-rate speech coder |
| 03/22/1994 | US5297236 Low computational-complexity digital filter bank for encoder, decoder, and encoder/decoder |
| 03/15/1994 | US5295224 Linear prediction speech coding with high-frequency preemphasis |
| 03/09/1994 | EP0375551B1 A speech coding/decoding system |
| 03/08/1994 | US5293450 Voice signal coding system |
| 03/08/1994 | US5293449 Analysis-by-synthesis 2,4 kbps linear predictive speech codec |
| 03/08/1994 | US5293448 Speech analysis-synthesis method and apparatus therefor |
| 03/02/1994 | EP0584840A2 Apparatus for adaptive interframe predictive decoding of a video signal |
| 03/02/1994 | EP0584718A1 Switched signal processing circuit |
| 03/02/1994 | EP0584666A1 Digital radio telephone with speech synthesis |