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)
05/2000
05/11/2000DE4447647C2 Vector sum excited linear predictive coding speech coder
05/09/2000US6061649 Signal encoding method and apparatus, signal decoding method and apparatus and signal transmission apparatus
05/09/2000US6061647 Voice activity detector
05/04/2000WO2000025230A2 Determining a tangent space and filtering data onto a manifold
05/03/2000EP0996949A2 Split band linear prediction vocoder
05/02/2000US6058361 Two-stage Hierarchical subband coding and decoding system, especially for a digitized audio signal
05/02/2000US6058360 Postfiltering audio signals especially speech signals
04/2000
04/26/2000EP0996111A2 Speech processing apparatus and method
04/26/2000EP0996110A1 Method and apparatus for speech activity detection
04/26/2000EP0995190A2 Speech coding based on determining a noise contribution from a phase change
04/25/2000US6055497 System, arrangement, and method for replacing corrupted speech frames and a telecommunications system comprising such arrangement
04/20/2000WO2000022608A1 A method of speech processing and an apparatus for processing of speech
04/19/2000EP0994463A2 Post filter
04/19/2000EP0993670A1 Method and apparatus for speech enhancement in a speech communication system
04/13/2000WO2000021077A1 Method for quantizing speech coder parameters
04/13/2000CA2345373A1 Method for quantizing speech coder parameters
04/12/2000EP0991453A1 Interactive toy
04/12/2000CN1051392C Vector quantizer method and apparatus
04/11/2000CA2196553C Analysis of audio quality
03/2000
03/30/2000WO1999059139A8 Speech coding based on determining a noise contribution from a phase change
03/30/2000WO1999059138A8 Refinement of pitch detection
03/29/2000EP0989754A2 Information processing apparatus and method, information recording apparatus and method, recording medium, and distribution medium
03/21/2000US6041294 Signal quality determining device and method
03/14/2000US6038530 Communication network for transmitting speech signals
03/14/2000CA2158847C A method and apparatus for speaker recognition
03/09/2000WO2000013173A1 Method for instrumental voice quality evaluation
03/09/2000WO2000013172A1 Signal processing techniques for time-scale and/or pitch modification of audio signals
03/09/2000WO1999060561A3 Split band linear prediction vocoder
03/09/2000CA2305652A1 Method for instrumental voice quality evaluation
03/07/2000US6035270 Trained artificial neural networks using an imperfect vocal tract model for assessment of speech signal quality
03/02/2000DE19840548A1 Verfahren zur instrumentellen ("objektiven") Sprachqualitätsbestimmung Method for the instrumental ("objective") speech quality assessment
03/01/2000EP0982713A2 Voice converter with extraction and modification of attribute data
02/2000
02/29/2000US6031915 Voice start recording apparatus
02/24/2000WO2000010161A1 Waveform coding method
02/24/2000CA2340215A1 Waveform coding method
02/22/2000CA2161257C Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
02/17/2000WO1999059139A3 Speech coding based on determining a noise contribution from a phase change
02/17/2000WO1999059138A3 Refinement of pitch detection
02/16/2000EP0980064A1 Method for carrying an automatic judgement of the transmission quality of audio signals
02/16/2000EP0979504A1 System and method for noise threshold adaptation for voice activity detection in nonstationary noise environments
02/08/2000US6023674 Non-parametric voice activity detection
02/08/2000CA2135629C Multi-segment vector quantizer for a speech coder suitable for use in a radiotelephone
02/02/2000EP0976124A2 Speech detection in a telecommunication system
01/2000
01/19/2000EP0972283A1 Vocoder system and method for performing pitch estimation using an adaptive correlation sample window
01/12/2000EP0970466A2 Voice conversion system and methodology
01/11/2000US6014620 Power spectral density estimation method and apparatus using LPC analysis
01/11/2000US6014617 Method and apparatus for extracting a fundamental frequency based on a logarithmic stability index
01/06/2000WO2000000962A1 Method for executing automatic evaluation of transmission quality of audio signals
12/1999
12/22/1999EP0965123A1 A high resolution post processing method for a speech decoder
12/22/1999EP0882288B1 Signal processing arrangements
12/14/1999US6003004 Speech recognition method and system using compressed speech data
12/08/1999EP0962913A1 Speech recognition
12/08/1999CN1238058A Speech processing system
12/07/1999US5999900 Reduced redundancy test signal similar to natural speech for supporting data manipulation functions in testing telecommunications equipment
12/07/1999US5999898 Voice/data discriminator
12/02/1999DE19821273A1 Meßverfahren zur gehörrichtigen Qualitätsbewertung von Audiosignalen Measuring method for aurally quality assessment of audio signals
12/01/1999EP0691022B1 Speech recognition with pause detection
11/1999
11/25/1999WO1999060561A2 Split band linear prediction vocoder
11/25/1999CA2294308A1 Split band linear prediction vocodor
11/24/1999EP0891617B1 Signal coding and decoding system, particularly for a digital audio signal
11/23/1999US5991718 System and method for noise threshold adaptation for voice activity detection in nonstationary noise environments
11/18/1999WO1999059139A2 Speech coding based on determining a noise contribution from a phase change
11/18/1999WO1999059138A2 Refinement of pitch detection
11/18/1999WO1999059134A1 Method and device for determining spectral voice characteristics in a spoken expression
11/17/1999EP0957471A2 Measuring process for loudness quality assessment of audio signals
11/17/1999EP0705501B1 Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
11/10/1999EP0955627A2 Subframe-based correlation
11/10/1999CN1234935A Method and device for blind equalizing of transmission channel effects on digital speech signal
11/10/1999CN1046366C Discriminating between stationary and non-stationary signals
11/09/1999US5983189 Control device for controlling the starting a vehicle in response to a voice command
11/03/1999EP0655161B1 Lost frame concealment
11/03/1999EP0655160B1 Transmission error concealment
11/03/1999EP0653091B1 Discriminating between stationary and non-stationary signals
11/02/1999US5978763 Voice activity detection using echo return loss to adapt the detection threshold
11/02/1999US5978759 Apparatus for expanding narrowband speech to wideband speech by codebook correspondence of linear mapping functions
10/1999
10/28/1999WO1999054015A1 Interactive toy
10/28/1999CA2296119A1 Interactive toy
10/27/1999EP0697124B1 Vector coding process, especially for voice signals
10/26/1999US5974377 Analysis-by-synthesis speech coding method with open-loop and closed-loop search of a long-term prediction delay
10/21/1999DE19818608A1 Speech detection and noise parameter estimating method for hands free speaking arrangement
10/20/1999EP0950238A1 Speech synthesis system
10/19/1999US5970453 Method and system for synthesizing speech
10/19/1999US5970452 Method for detecting a signal pause between two patterns which are present on a time-variant measurement signal using hidden Markov models
10/19/1999US5970447 Detection of tonal signals
10/19/1999US5970440 Method and device for short-time Fourier-converting and resynthesizing a speech signal, used as a vehicle for manipulating duration or pitch
10/07/1999WO1999050991A1 Quality evaluation method
10/07/1999WO1999050832A1 Voice recognition system in a radio communication system and method therefor
10/07/1999WO1999050824A1 A process and system for objective audio quality measurement
10/06/1999CN1231050A Transmitter with improved harmonic speech encoder
10/05/1999US5963904 Phoneme dividing method using multilevel neural network
10/05/1999US5963898 Analysis-by-synthesis speech coding method with truncation of the impulse response of a perceptual weighting filter
10/05/1999US5963896 Speech coder including an excitation quantizer for retrieving positions of amplitude pulses using spectral parameters and different gains for groups of the pulses
10/05/1999US5963895 Transmission system with speech encoder with improved pitch detection
09/1999
09/30/1999DE19813285A1 Method of automatic measurement of the clarity of speech in a motor vehicle
09/29/1999EP0946015A1 Method and system for estimating transmission quality
09/28/1999US5960388 Voiced/unvoiced decision based on frequency band ratio
09/23/1999WO1999048085A1 A signal processing method to analyse transients of speech signals
09/23/1999WO1999048084A1 Method and device for processing a sound signal
09/22/1999EP0944038A1 Speech encoder with features extracted from current and previous frames
09/22/1999EP0944037A1 Speech encoder with features extracted from current and previous frames
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