Patents
Sitemap › G10 - Musical instruments; Acoustics › G10L - Speech analysis or synthesis; Speech recognition; Speech or voice processing; Speech or audio coding or decoding › G10L 25 - Speech or voice analysis techniques not restricted to a single one of groups
Patents for G10L 25 - Speech or voice analysis techniques not restricted to a single one of groups (4,910)
03/1994
03/09/1994EP0266423B1 Method of collating voice pattern in voice recognizing apparatus
03/08/1994US5293588 Speech detection apparatus not affected by input energy or background noise levels
03/08/1994US5293450 Voice signal coding system
03/01/1994CA1327404C Voice coding apparatus
01/1994
01/26/1994EP0579812A1 Process for speech analysis
01/06/1994WO1994000922A1 Method and apparatus for objective speech quality measurements of telecommunication equipment
12/1993
12/08/1993EP0573358A1 Variable speed voice synthesizer
12/06/1993CA2097548A1 Method and device for vocal synthesis at variable speed
11/1993
11/24/1993EP0335521B1 Voice activity detection
09/1993
09/30/1993WO1993019459A1 High-efficiency encoding method
09/15/1993EP0226613B1 Noise supression system
09/02/1993WO1993017519A1 Fractal coding of data
08/1993
08/24/1993CA1321646C Coded speech communication system having code books for synthesizing small-amplitude components
08/19/1993WO1993016465A1 Process for speech analysis
07/1993
07/27/1993US5231692 Pitch period searching method and circuit for speech codec
07/14/1993EP0550657A1 A method of, and system for, coding analogue signals.
07/13/1993US5228088 Voice signal processor
06/1993
06/23/1993EP0548054A2 Voice activity detector
06/15/1993US5220610 Speech signal processing apparatus for extracting a speech signal from a noisy speech signal
05/1993
05/26/1993EP0543719A1 Method and arrangement for voiced-unvoiced decision applied in a very low rate vocoder
05/25/1993US5214706 Method of coding a sampled speech signal vector
05/23/1993CA2083469A1 Voicing decision method and device for vocoder with very low bit rate
05/04/1993US5208864 Method of detecting acoustic signal
05/04/1993US5208862 Speech coder
05/04/1993US5208861 Pitch extraction apparatus for an acoustic signal waveform
04/1993
04/21/1993EP0537804A2 Speech recording apparatus
04/21/1993CN1020358C Sound synthesizing method and apparatus
04/20/1993US5204906 Voice signal processing device
03/1993
03/30/1993US5199076 Speech coding and decoding system
03/23/1993US5197113 Method of and arrangement for distinguishing between voiced and unvoiced speech elements
03/16/1993US5195138 Voice signal processing device
02/1993
02/18/1993DE4127295A1 Speech recognition system for equipment control e.g. lighting and radio - has input processed to identify key spectrum content for simple commands to control setting and on=off switching
12/1992
12/29/1992US5175799 Speech recognition apparatus using pitch extraction
12/23/1992WO1992022889A1 Method of detecting a wanted signal in additive noise
12/16/1992EP0518742A1 Method for detecting a noisy wanted signal
12/15/1992US5171930 Electroglottograph-driven controller for a MIDI-compatible electronic music synthesizer device
12/09/1992EP0517233A1 Music/voice discriminating apparatus
11/1992
11/25/1992EP0514912A2 Speech coding and decoding methods
11/11/1992EP0308433B1 An adaptive multivariate estimating apparatus
09/1992
09/09/1992EP0310636B1 Distance measurement control of a multiple detector system
08/1992
08/13/1992DE4040107C1 Analysing human singing and speech voice strength - forms relation of preset formant level and total voice sound level in real time
07/1992
07/28/1992US5134657 Vocal demodulator
06/1992
06/17/1992EP0490758A2 Method and apparatus for detecting change of speech signal characteristics for low bitrate vocoders
06/17/1992EP0490740A1 Method and apparatus for pitch period determination of the speech signal in very low bitrate vocoders
06/15/1992CA2057485A1 Method and device for the detection of changes in the characteristics of the speech signal and application of said method and device to low bit-rate vocoders
06/12/1992CA2057139A1 Method to evaluate the pitch and voicing of the speech signal in vocoders with very slow bit rates
06/09/1992US5121434 Speech analyzer and synthesizer using vocal tract simulation
05/1992
05/19/1992CA1301339C Parallel processing pitch detector
04/1992
04/16/1992WO1992006470A1 A method of, and system for, coding analogue signals
04/15/1992EP0235181B1 A parallel processing pitch detector
04/15/1992CN1060378A Method of and system for coding analogue signals
03/1992
03/25/1992EP0476614A2 Speech coding and decoding system
03/17/1992US5097511 Sound synthesizing method and apparatus
03/11/1992EP0474496A2 Speech recognition apparatus
03/11/1992EP0473664A1 Analysis of waveforms.
03/04/1992EP0472578A1 Apparatus and methods for the generation of stabilised images from waveforms.
02/1992
02/20/1992WO1992002927A1 A method of coding a sampled speech signal vector
02/20/1992DE4126902A1 Speech interval establishment unit for speech recognition system - operates in two stages on filtered, multiplexed and digitised signals from speech and background noise microphones
02/12/1992EP0470941A1 A method of coding a sampled speech signal vector
01/1992
01/22/1992EP0467507A1 Improved cardiac monitoring system
12/1991
12/18/1991EP0287104B1 Sound synthesizing method and apparatus
12/04/1991EP0459384A1 Speech signal processing apparatus for cutting out a speech signal from a noisy speech signal
12/04/1991EP0459382A2 Speech signal processing apparatus for detecting a speech signal from a noisy speech signal
12/04/1991EP0459364A1 Noise signal prediction system
12/04/1991EP0459363A1 Voice signal coding system
12/04/1991EP0459362A1 Voice signal processor
10/1991
10/16/1991EP0451796A1 Speech detection apparatus with influence of input level and noise reduced
10/10/1991CA2040025A1 Speech detection apparatus with influence of input level and noise reduced
10/08/1991US5056150 Method and apparatus for real time speech recognition with and without speaker dependency
09/1991
09/26/1991DE4106405A1 Noise suppressor for speech identification system - subtracts microphone signal data from loudspeaker signal data
09/03/1991US5046100 Adaptive multivariate estimating apparatus
08/1991
08/28/1991EP0443548A2 Speech coder
08/21/1991EP0442342A1 Voice signal processing device
08/14/1991CN1013525B Real-time phonetic recognition method and device with or without function of identifying a person
07/1991
07/31/1991EP0439073A1 Voice signal processing device
04/1991
04/24/1991EP0424071A2 Speaker recognition
04/10/1991EP0421444A2 Pitch period searching method and circuit for speech code
04/09/1991US5007093 Adaptive threshold voiced detector
03/1991
03/26/1991US5003604 Voice coding apparatus
03/19/1991US5001761 Device for normalizing a speech spectrum
03/07/1991WO1991003042A1 A method and an apparatus for classification of a mixed speech and noise signal
02/1991
02/19/1991US4993421 Cardiac monitoring system
02/05/1991US4991213 Speech specific adaptive transform coder
01/1991
01/02/1991EP0405548A2 System for speech coding and apparatus for the same
12/1990
12/04/1990US4975958 Coded speech communication system having code books for synthesizing small-amplitude components
11/1990
11/29/1990WO1990014739A1 Analysis of waveforms
11/29/1990WO1990014656A1 Apparatus and methods for the generation of stabilised images from waveforms
11/22/1990EP0398180A2 Method of and arrangement for distinguishing between voiced and unvoiced speech elements
11/20/1990US4972490 Distance measurement control of a multiple detector system
11/15/1990WO1990013890A1 Digital waveform encoder and generator
11/07/1990EP0396121A1 A system for coding wide-band audio signals
10/1990
10/25/1990DE4012349A1 Noise elimination device for speech recognition system - uses spectral subtraction of sampled noise values from sampled speech values
09/1990
09/25/1990US4959865 A method for indicating the presence of speech in an audio signal
09/12/1990EP0386820A1 Method and arrangement for probabilistic pitch measuring
09/12/1990EP0386765A2 Method of detecting acoustic signal
09/05/1990EP0385799A2 Speech signal processing method
08/1990
08/08/1990EP0381507A2 Silence/non-silence discrimination apparatus
07/1990
07/24/1990US4944012 Speech analyzing and synthesizing apparatus utilizing differential value-based variable code length coding and compression of soundless portions
06/1990
06/06/1990CN1042790A Real-time phonetic recognition method and device with or without function of identfying a person
05/1990
05/31/1990DE3937420A1 Determining roughness from fundamental frequency variations - by taking difference between measured fundamental characteristic and generated smoothed fundamental characteristic
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