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)
08/1998
08/11/1998US5794188 Speech signal distortion measurement which varies as a function of the distribution of measured distortion over time and frequency
08/11/1998US5793930 Analogue signal coder
08/11/1998US5793891 Adaptive training method for pattern recognition
08/06/1998WO1998025260A3 Speech synthesis using dual neural networks
08/05/1998EP0856961A2 Testing telecommunications apparatus
07/1998
07/28/1998US5787389 Speech encoder with features extracted from current and previous frames
07/22/1998EP0634041B1 Method and apparatus for encoding/decoding of background sounds
07/15/1998EP0853309A1 Method and apparatus for signal analysis
07/14/1998US5781881 Variable-subframe-length speech-coding classes derived from wavelet-transform parameters
07/14/1998US5780759 Method for pitch recognition, in particular for musical instruments which are excited by plucking or striking
07/08/1998EP0852052A1 System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions
07/07/1998US5778334 Speech coders with speech-mode dependent pitch lag code allocation patterns minimizing pitch predictive distortion
07/02/1998DE19721684A1 Speech signal determination method for vocoder
07/02/1998DE19647399C1 Gehörangepaßte Qualitätsbeurteilung von Audiotestsignalen Hearing Adapted quality assessment of audio test signals
06/1998
06/30/1998US5774846 Speech coding apparatus, linear prediction coefficient analyzing apparatus and noise reducing apparatus
06/30/1998US5774836 System and method for performing pitch estimation and error checking on low estimated pitch values in a correlation based pitch estimator
06/16/1998US5768437 Fractal coding of data
06/11/1998WO1998025260A2 Speech synthesis using dual neural networks
06/10/1998EP0846318A1 Pattern recognition
06/09/1998US5765127 High efficiency encoding method
06/09/1998US5764779 Signal processing method
06/03/1998CN1183885A Signal quality determining device and method
06/03/1998CN1183884A Signal quality determining device and method
06/03/1998CN1183883A Signal quality determining device and method
05/1998
05/28/1998WO1998023130A1 Hearing-adapted quality assessment of audio signals
05/28/1998WO1998022937A1 Speech processing system
05/28/1998CA2264773A1 Speech processing system
05/13/1998EP0840975A1 Assessment of signal quality
05/12/1998US5751902 Adaptive prediction filter using block floating point format and minimal recursive recomputations
05/07/1998WO1998019298A1 Postfiltering audio signals, especially speech signals
05/05/1998US5749067 Voice activity detector
04/1998
04/29/1998EP0579812B1 Process for speech analysis
04/28/1998CA2016042C System for coding wide-bank audio signals
04/08/1998EP0834863A2 Speech coder at low bit rates
04/08/1998EP0834079A1 A power spectral density estimation method and apparatus
03/1998
03/17/1998US5729654 Vector encoding method, in particular for voice signals
03/11/1998EP0828240A2 Control device for controlling the starting of a vehicle by means of a voice
03/05/1998WO1998005031A3 A method and a device for the reduction impulse noise from a speech signal
03/04/1998CN1175053A Controller for starting vehicle by means of phoneme
02/1998
02/25/1998EP0825587A2 Method and device for verification of speech
02/25/1998CN1174623A Voice activity detection
02/18/1998CN1173939A Speech coding method using synthesis analysis
02/18/1998CN1173938A Speech coding method using synthesis analysis
02/12/1998WO1998006196A1 Process and device for evaluating the quality of a transmitted voice signal
02/12/1998WO1998006090A1 Speech/audio coding with non-linear spectral-amplitude transformation
02/12/1998DE19643900C1 Audio signal post filter, especially for speech signals
02/05/1998WO1998005031A2 A method and a device for the reduction impulse noise from a speech signal
01/1998
01/29/1998DE19629946A1 LPC analysis and synthesis method for basic frequency descriptive functions
01/28/1998EP0821346A2 Method for speaker verification by a computer by means of at least one speech signal spoken in by a speaker
01/28/1998EP0821345A1 Method to determine the fundamental frequency of a speech signal
01/21/1998EP0819302A1 Arrangement and method relating to speech transmission and a telecommunications system comprising such arrangement
01/15/1998WO1998001848A1 Speech synthesis system
01/15/1998WO1998001847A1 Voice activity detector
01/15/1998CA2259374A1 Speech synthesis system
01/07/1998EP0815707A1 Signal quality determining device and method
01/07/1998EP0815706A1 Signal quality determining device and method
01/07/1998EP0815705A1 Signal quality determining device and method
01/07/1998EP0815555A1 Method and system for coding human speech for subsequent reproduction thereof
01/07/1998EP0815553A2 Method of detecting a pause between two signal patterns on a time-variable measurement signal
12/1997
12/31/1997CN1036886C Method of and system for coding analogue signal
12/30/1997US5704000 Robust pitch estimation method and device for telephone speech
12/09/1997US5696873 Vocoder system and method for performing pitch estimation using an adaptive correlation sample window
12/04/1997WO1997045831A1 Signal processing arrangements
12/03/1997EP0809841A1 Voice activity detection
12/02/1997US5694520 Method and device for speech recognition
11/1997
11/27/1997WO1997044779A1 Device for determining the quality of an output signal to be generated by a signal processing circuit, and also method
11/26/1997EP0809236A1 Device for determining the quality of an output signal to be generated by a signal processing circuit, and also method
11/26/1997CN1166019A Vector quantizer method
11/20/1997WO1997043756A1 A method and a system for speech-to-speech conversion
11/06/1997DE19715126A1 Sprachsignal-Codiervorrichtung A speech signal encoder device
11/06/1997DE19711996A1 Voice signal discrimination apparatus for telephone connection
11/05/1997EP0804787A1 Method and device for resynthesizing a speech signal
11/04/1997US5684920 Acoustic signal transform coding method and decoding method having a high efficiency envelope flattening method therein
10/1997
10/22/1997EP0801790A1 Speech coding method using synthesis analysis
10/22/1997EP0801788A1 Speech coding method using synthesis analysis
10/22/1997EP0801787A1 Method for forming a cohort for use in identification of an individual
10/21/1997US5680130 Method for encoding an input acoustical signal
10/16/1997WO1997038417A1 Signal coding and decoding system, particularly for a digital audio signal
10/15/1997CN1162113A Tone detecting device
10/09/1997WO1997037345A1 Speech processing
10/07/1997US5675702 Multi-segment vector quantizer for a speech coder suitable for use in a radiotelephone
09/1997
09/30/1997CA2036199C Voice signal processing device
09/25/1997WO1997035301A1 Vocoder system and method for performing pitch estimation using an adaptive correlation sample window
09/24/1997EP0796489A2 Method for transforming a speech signal using a pitch manipulator
09/04/1997WO1997032428A1 Training process
08/1997
08/28/1997WO1997031368A1 Signal processing arrangements
08/28/1997WO1997031366A1 System and method for error correction in a correlation-based pitch estimator
08/12/1997US5657350 Audio coder/decoder with recursive determination of prediction coefficients based on reflection coefficients derived from correlation coefficients
07/1997
07/31/1997WO1997027579A1 Method and apparatus for evaluating an audio decoder
07/29/1997US5652843 Voice signal coding system
07/17/1997WO1997025708A1 Method and system for coding human speech for subsequent reproduction thereof
07/15/1997US5649055 Voice activity detector for speech signals in variable background noise
07/02/1997CN1153565A Transmission system and method for encoding speech with improved pitch detection
07/01/1997US5644678 Method of estimating voice pitch by rotating two dimensional time-energy region on speech acoustic signal plot
06/1997
06/17/1997US5640490 User independent, real-time speech recognition system and method
06/04/1997EP0776567A1 Analysis of audio quality
06/04/1997EP0776566A1 Test method
05/1997
05/29/1997WO1997019444A1 Method and device for resynthesizing a speech signal
05/28/1997DE19540859A1 Removing unwanted speech components from mixed sound signal
05/21/1997EP0774750A2 Determination of line spectrum frequencies for use in a radiotelephone
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