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)
05/1990
05/08/1990US4924517 Encoder of a multi-pulse type capable of controlling the number of excitation pulses
05/08/1990US4924508 Pitch detection for use in a predictive speech coder
05/01/1990US4922539 Method of encoding speech signals involving the extraction of speech formant candidates in real time
04/1990
04/25/1990EP0364647A1 Improvement to vector quantizing coder
04/17/1990US4918729 Voice signal encoding and decoding apparatus and method
04/10/1990US4916742 Method of recording and reading audio information signals in digital form, and apparatus for performing same
04/05/1990DE3833606A1 Method for processing acoustic signals and devices for carrying out the method
04/04/1990EP0361443A2 Method and system for voice coding based on vector quantization
04/04/1990EP0361432A2 Method of and device for speech signal coding and decoding by means of a multipulse excitation
04/03/1990US4914749 Method capable of extracting a value of a spectral envelope parameter with a reduced amount of operations and a device therefor
04/03/1990US4914702 Formant pattern matching vocoder
04/03/1990US4914701 Method and apparatus for encoding speech
04/03/1990US4914620 Capacity extensible data storage for use in electronic apparatus
03/1990
03/28/1990EP0360388A2 Method and apparatus for automatic address setting for recording and replay
03/28/1990EP0360265A2 Communication system capable of improving a speech quality by classifying speech signals
03/27/1990US4912764 Digital speech coder with different excitation types
03/27/1990US4912763 Process for multirate encoding signals and device for implementing said process
03/20/1990US4910781 Code excited linear predictive vocoder using virtual searching
03/20/1990US4910780 Audio signal recording and reproducing apparatus utilizing digital data compression and extension
03/20/1990US4910706 Analog memory for storing digital information
03/13/1990US4908863 Multi-pulse coding system
03/06/1990US4907277 Method of reconstructing lost data in a digital voice transmission system and transmission system using said method
03/06/1990US4907276 Fast search method for vector quantizer communication and pattern recognition systems
02/1990
02/20/1990US4903303 Multi-pulse type encoder having a low transmission rate
02/20/1990US4903301 Method and system for transmitting variable rate speech signal
02/06/1990US4899386 Device for deciding pole-zero parameters approximating spectrum of an input signal
02/06/1990US4899385 Code excited linear predictive vocoder
02/06/1990US4899384 Table controlled dynamic bit allocation in a variable rate sub-band speech coder
01/1990
01/24/1990EP0351479A1 Low bit rate voice coding method and device
01/24/1990EP0175752B1 Multipulse lpc speech processing arrangement
01/23/1990US4896362 System for subband coding of a digital audio signal
01/23/1990US4896361 Digital speech coder having improved vector excitation source
01/23/1990US4896356 Sub-band coders, decoders and filters
01/23/1990US4896260 Data processor having integrated circuit memory refresh
12/1989
12/26/1989US4890328 Voice synthesis utilizing multi-level filter excitation
12/26/1989US4890327 Multi-rate digital voice coder apparatus
12/26/1989US4890326 Method for compressing data
12/26/1989US4890325 Speech coding transmission equipment
12/20/1989EP0347307A2 Coding method and linear prediction speech coder
12/14/1989WO1989012292A1 Encoder/decoder apparatus
12/14/1989DE3834871C1 Method for encoding speech
12/13/1989EP0192707B1 Method of decoding a predictively encoded digital signal
12/05/1989US4885790 Processing of acoustic waveforms
11/1989
11/30/1989WO1989011718A1 Improved adaptive transform coding
11/23/1989EP0342687A2 Coded speech communication system having code books for synthesizing small-amplitude components
11/23/1989EP0141497B1 Voice recognition
11/15/1989EP0341271A1 Coded communications system
11/14/1989US4881267 Encoder of a multi-pulse type capable of optimizing the number of excitation pulses and quantization level
11/08/1989EP0341129A1 Method and apparatus for coding speech signal energy in very low bitrate vocoders
11/08/1989EP0340301A1 Digital adaptive transform coding process
10/1989
10/19/1989WO1989009985A1 Computationally efficient sine wave synthesis for acoustic waveform processing
10/19/1989WO1989009965A1 Error detection method for sub-band coding
10/18/1989EP0337636A2 Harmonic speech coding arrangement
10/11/1989EP0336658A2 Vector quantization in a harmonic speech coding arrangement
10/11/1989EP0336502A2 Method of and device for encoding a speech parameter such as the pitch, as a function of time
10/10/1989US4873724 Multi-pulse encoder including an inverse filter
10/10/1989US4873723 Method and apparatus for multi-pulse speech coding
10/04/1989EP0335813A2 Redundant message processing and storage
10/03/1989US4872202 ASCII LPC-10 conversion
09/1989
09/26/1989US4870687 Oral readout rangefinder
09/26/1989US4870559 Intelligent transducer
09/26/1989CA1261472A1 Reference speech pattern generating method
09/21/1989DE3808298A1 Schaltungsanordnung zur speicherung eines sprachsignals in einem digitalen sprachspeicher Circuitry for storing a speech signal in a digital speech memory
09/20/1989EP0333425A2 Speech coding
09/20/1989EP0333249A1 Circuit arrangement for storing a speech signal in a digital speech memory
09/20/1989EP0333121A2 Voice coding apparatus
09/19/1989US4868867 Vector excitation speech or audio coder for transmission or storage
09/13/1989EP0331858A1 Multi-rate voice encoding method and device
09/13/1989EP0331857A1 Improved low bit rate voice coding method and system
09/12/1989US4866777 Apparatus for extracting features from a speech signal
09/07/1989DE3806411A1 Method for transmitting an audio signal and an auxiliary signal
09/06/1989CN1035379A Digital speech coder having improved vector excitation source
09/05/1989US4864621 Method of speech coding
09/05/1989US4864562 Sub-rate multi-media data transmission control system
09/05/1989US4864304 Analog voltage signal comparator circuit
08/1989
08/22/1989US4860355 Method of and device for speech signal coding and decoding by parameter extraction and vector quantization techniques
08/22/1989US4860315 ADPCM encoding and decoding circuits
08/08/1989US4856068 Audio pre-processing methods and apparatus
08/08/1989US4856066 Speech communication system and method
08/08/1989CA1258316A1 Voice synthesis utilizing multi-level filter excitation
07/1989
07/25/1989US4852179 Variable frame rate, fixed bit rate vocoding method
07/19/1989EP0324283A1 Speech coding
07/18/1989US4850022 Speech signal processing system
07/13/1989WO1989006419A1 Digital speech coder having improved vector excitation source
07/13/1989WO1989006418A1 Speech coding
07/11/1989US4847906 Linear predictive speech coding arrangement
07/11/1989US4847905 Method of encoding speech signals using a multipulse excitation signal having amplitude-corrected pulses
06/1989
06/27/1989CA1256616A1 Capacity expander for telephone line
06/13/1989CA1255802A1 Low bit-rate pattern encoding and decoding with a reduced number of excitation pulses
06/06/1989CA1255361A1 Digital analysing and synthesizing filter bank with maximum sampling rate reduction
05/1989
05/16/1989US4831624 Error detection method for sub-band coding
05/09/1989US4829574 Signal processing
05/02/1989US4827517 Digital speech processor using arbitrary excitation coding
04/1989
04/27/1989DE3733786A1 Digital adaptive transformation coding methods
04/27/1989DE3733772A1 Multi-signal processor system
04/25/1989US4825364 Monolithic data processor with memory refresh
04/20/1989WO1989003574A1 Digital adaptive transform coding process
04/18/1989CA1252842A1 Predictive communication system filtering arrangement
04/12/1989EP0311494A1 Method and apparatus for digital transmission of speech between mobile stations
04/11/1989US4821324 Low bit-rate pattern encoding and decoding capable of reducing an information transmission rate
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