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)
04/1989
04/11/1989US4821311 Automatic telephone answering/recording device of digital type
04/11/1989US4821260 Transmission system
04/11/1989CA1252568A1 Low bit-rate pattern encoding and decoding capable of reducing an information transmission rate
04/06/1989DE3732047A1 Verfahren zur umcodierung von kanalvocoder-parameter in lpc-vocoder-parameter A method for transcoding channel vocoders-parameter in lpc vocoder parameters
03/1989
03/29/1989EP0308817A2 Method for converting channel vocoder parameters into LPC vocoder parameters
03/29/1989EP0308540A2 Oscillator circuit
03/29/1989EP0186763B1 Method of and device for speech signal coding and decoding by vector quantization techniques
03/28/1989US4817157 Digital speech coder having improved vector excitation source
03/28/1989US4817155 Method and apparatus for speech analysis
03/21/1989US4815135 Speech signal processor
03/21/1989US4815134 Very low rate speech encoder and decoder
03/15/1989EP0307122A1 Speech coding
03/09/1989WO1989002148A1 Coded communications system
03/09/1989WO1989002147A1 Speech coding
03/07/1989US4811398 Method of and device for speech signal coding and decoding by subband analysis and vector quantization with dynamic bit allocation
03/07/1989US4811397 Apparatus for recording and reproducing human speech
03/07/1989US4811396 Speech coding system
03/07/1989US4811376 Paging system using LPC speech encoding with an adaptive bit rate
02/1989
02/28/1989US4809331 Apparatus and methods for speech analysis
02/28/1989US4809330 Encoder capable of removing interaction between adjacent frames
02/28/1989US4809192 Method for translating sentences
02/21/1989US4807289 Apparatus for recording and reproducing human speech by its analysis and synthesis
02/21/1989CA1250368A1 Formant extractor
02/15/1989EP0303312A1 Method and system for determining the variation of a speech parameter, for example the pitch, in a speech signal
02/14/1989US4805220 Conversionless digital speech production
02/14/1989US4805193 Protection of energy information in sub-band coding
02/07/1989US4803730 Fast significant sample detection for a pitch detector
02/01/1989EP0301199A1 Normalization of speech by adaptive labelling
01/1989
01/31/1989US4802224 Reference speech pattern generating method
01/31/1989US4802223 Low data rate speech encoding employing syllable pitch patterns
01/31/1989US4802221 Digital system and method for compressing speech signals for storage and transmission
01/31/1989US4802171 Method for error correction in digitally encoded speech
01/19/1989DE3722241A1 Method for transmitting a monophonic broadcast signal
01/18/1989EP0299711A2 An audio signal recording and reproducing apparatus
01/17/1989US4799261 Low data rate speech encoding employing syllable duration patterns
01/10/1989US4797926 Digital speech vocoder
01/10/1989US4797925 Method for coding speech at low bit rates
01/03/1989US4796216 Linear predictive coding technique with one multiplication step per stage
12/1988
12/28/1988EP0296764A1 Code excited linear predictive vocoder and method of operation
12/28/1988EP0296763A1 Code excited linear predictive vocoder and method of operation
12/15/1988WO1988010035A1 Protection of energy information in sub-band coding
12/15/1988WO1988009967A1 Method for error correction in digitally encoded speech
12/13/1988US4791670 Method of and device for speech signal coding and decoding by vector quantization techniques
12/13/1988US4791654 Resisting the effects of channel noise in digital transmission of information
12/07/1988EP0294020A2 Vector adaptive coding method for speech and audio
12/07/1988EP0294012A2 Resisting the effects of channel noise in digital transmission of information
12/06/1988US4790016 Adaptive method and apparatus for coding speech
11/1988
11/29/1988CA1245780A1 Method of reconstructing lost data in a digital voice transmission system and transmission system using said method
11/22/1988CA1245363A1 Pattern matching vocoder
11/17/1988EP0291377A1 Conversion apparatus for transmission networks using different bit rates, and its use in a multirate transmission system
11/17/1988EP0290581A1 Process for transmitting digital audio-signals.
11/02/1988EP0289285A2 Linear predictive coding analysing apparatus and bandlimited circuit therefor
11/02/1988EP0289080A1 System for subband coding of a digital audio signal
10/1988
10/26/1988EP0288281A2 ADPCM encoding and decoding systems
10/26/1988EP0288206A2 Fast access digital audio message system and method
10/26/1988EP0287578A1 Digital coding process.
10/26/1988EP0138954B1 Speech pattern processing utilizing speech pattern compression
10/26/1988EP0118484B1 Lpc word recognizer utilizing energy features
10/25/1988CA1243779A1 Speech processing system
10/18/1988US4779209 Editing voice data
10/13/1988DE3706614A1 Music or speech recorder without moving or mechanical parts
10/12/1988EP0142171B1 Frequency comparing circuit
10/11/1988CA1243122A1 Processing of acoustic waveforms
10/11/1988CA1243121A1 Multi-pulse excitation linear-predictive speech coder
10/05/1988EP0285276A2 Coding of acoustic waveforms
10/05/1988EP0285275A2 Audio pre-processing methods and apparatus
10/04/1988US4776015 Speech analysis-synthesis apparatus and method
10/04/1988US4776014 Method for pitch-aligned high-frequency regeneration in RELP vocoders
09/1988
09/21/1988EP0283277A2 System for synthesizing speech
09/21/1988EP0282518A1 Method of speech coding
09/20/1988CA1242279A1 Speech signal processor
09/13/1988US4771465 Processing system for synthesizing voice from encoded information
09/07/1988EP0280827A1 Pitch detection process and speech coder using said process
09/07/1988EP0127729B1 Voice messaging system with unified pitch and voice tracking
08/1988
08/24/1988EP0279451A2 Speech coding transmission equipment
08/23/1988US4766562 Digital analyzing and synthesizing filter bank with maximum sampling rate reduction
08/23/1988CA1241117A1 Speech low rate coding method using a multipulse excitation signal
08/23/1988CA1241116A1 Method of and device for speech signal coding and decoding by vector quantization techniques
08/16/1988US4764965 Apparatus for processing document data including voice data
08/16/1988US4764963 Speech pattern compression arrangement utilizing speech event identification
08/10/1988EP0277613A2 Audio signal transmission method
08/09/1988CA1240396A1 Relp vocoder implemented in digital signal processors
08/03/1988EP0135512B1 Improved method and means of determining coefficients for linear predictive coding
07/1988
07/27/1988EP0275751A1 Method and apparatus for the digital transmission of voice signals by way of a radio channel
07/27/1988EP0275273A1 Method and system for compressing speech signal data.
07/26/1988CA1239701A1 Method and apparatus for encoding speech
07/19/1988CA1239480A1 Wideband adaptive prediction
07/12/1988US4757517 System for transmitting voice signal
07/05/1988US4755994 Capacity expander for telephone line
07/05/1988US4755889 Audio and video digital recording and playback system
06/1988
06/29/1988EP0162585B1 Encoder capable of removing interaction between adjacent frames
06/23/1988EP0255524A4 Method and apparatus for synthesizing speech without voicing or pitch information.
06/22/1988EP0271866A2 Subrate multimedia data transmission control system
06/22/1988EP0271805A2 Transmission system
06/21/1988US4752956 Digital speech coder with baseband residual coding
06/02/1988WO1988004117A1 Process for transmitting digital audio-signals
05/1988
05/18/1988EP0267344A1 Process for the multi-rate encoding of signals, and device for carrying out said process
05/11/1988EP0266868A1 Fast significant sample detection for a pitch detector
05/11/1988EP0266620A1 Method of and device for speech signal coding and decoding by parameter extraction and vector quantization techniques
05/10/1988US4744042 Transform processor system having post processing
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