Inventor

NISHIGUCHI MASAYUKI

JP139 patents

Patents

50 patents

US7454330B1Nov 18, 2008

Method and apparatus for speech encoding and decoding by sinusoidal analysis and waveform encoding with phase reproducibility

SONY CORP60 citations98

US6611800B1Aug 26, 2003

Vector quantization method and speech encoding method and apparatus

SONY CORP114 citations98

US6539355B1Mar 25, 2003

Signal band expanding method and apparatus and signal synthesis method and apparatus

SONY CORP88 citations98

US5909663AJun 1, 1999

Speech decoding method and apparatus for selecting random noise codevectors as excitation signals for an unvoiced speech frame

SONY CORP94 citations98

US5878388AMar 2, 1999

Voice analysis-synthesis method using noise having diffusion which varies with frequency band to modify predicted phases of transmitted pitch data blocks

SONY CORP118 citations98

US5819212AOct 6, 1998

Speech signal transmitting and receiving apparatus with noise sensitive volume control

SONY CORP302 citations97

US6711538B1Mar 23, 2004

Information processing apparatus and method, and recording medium

SONY CORP64 citations96

US6018707AJan 25, 2000

Vector quantization method, speech encoding method and apparatus

SONY CORP83 citations96

US5873059AFeb 16, 1999

Method and apparatus for decoding and changing the pitch of an encoded speech signal

SONY CORP57 citations96

US5828996AOct 27, 1998

Apparatus and method for encoding/decoding a speech signal using adaptively changing codebook vectors

SONY CORP80 citations96

US5812970ASep 22, 1998

Method based on pitch-strength for reducing noise in predetermined subbands of a speech signal

SONY CORP75 citations96

US5809455ASep 15, 1998

Method and device for discriminating voiced and unvoiced sounds

SONY CORP71 citations96

US5752226AMay 12, 1998

Method and apparatus for reducing noise in speech signal

SONY CORP59 citations96

US5752222AMay 12, 1998

Speech decoding method and apparatus

SONY CORP60 citations96

US5749065AMay 5, 1998

Speech encoding method, speech decoding method and speech encoding/decoding method

SONY CORP76 citations96

US5668927ASep 16, 1997

Method for reducing noise in speech signals by adaptively controlling a maximum likelihood filter for calculating speech components

SONY CORP41 citations96

US5664052ASep 2, 1997

Method and device for discriminating voiced and unvoiced sounds

SONY CORP73 citations96

US5960388ASep 28, 1999

Voiced/unvoiced decision based on frequency band ratio

SONY CORP72 citations95

US5950153ASep 7, 1999

Audio band width extending system and method

SONY CORP146 citations95

US5473727ADec 5, 1995

Voice encoding method and voice decoding method

SONY CORP144 citations95

US5115240AMay 19, 1992

Method and apparatus for encoding voice signals divided into a plurality of frequency bands

SONY CORP111 citations95

US7962007B2Jun 14, 2011

Signal processing device and signal processing method

SONY CORP43 citations94

US5687285ANov 11, 1997

Noise reducing method, noise reducing apparatus and telephone set

SONY CORP60 citations94

US7720235B2May 18, 2010

Signal processing method and apparatus, signal processing program, and recording medium

SONY CORP20 citations93

US7454329B2Nov 18, 2008

Method and apparatus for classifying signals, method and apparatus for generating descriptors and method and apparatus for retrieving signals

SONY CORP20 citations93

US7337027B2Feb 26, 2008

Audio signal reproducing apparatus

SONY CORP20 citations93

US7212973B2May 1, 2007

Encoding method, encoding apparatus, decoding method, decoding apparatus and program

SONY CORP45 citations93

US6990443B1Jan 24, 2006

Method and apparatus for classifying signals method and apparatus for generating descriptors and method and apparatus for retrieving signals

SONY CORP33 citations93

US6695477B1Feb 24, 2004

Audio signal reproducing apparatus

SONY CORP32 citations93

US6681204B2Jan 20, 2004

Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal

SONY CORP26 citations93

US6532443B1Mar 11, 2003

Reduced length infinite impulse response weighting

SONY CORP20 citations93

US6445800B1Sep 3, 2002

Audio signal reproducing apparatus

SONY CORP17 citations93

US6353808B1Mar 5, 2002

Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal

SONY CORP33 citations93

US6292777B1Sep 18, 2001

Phase quantization method and apparatus

SONY CORP38 citations93

US6108621AAug 22, 2000

Speech analysis method and speech encoding method and apparatus

SONY CORP23 citations93

US5983173ANov 9, 1999

Envelope-invariant speech coding based on sinusoidal analysis of LPC residuals and with pitch conversion of voiced speech

SONY CORP24 citations93

US5974373AOct 26, 1999

Method for reducing noise in speech signal and method for detecting noise domain

SONY CORP31 citations93

US5953696ASep 14, 1999

Detecting transients to emphasize formant peaks

SONY CORP43 citations93

US5950155ASep 7, 1999

Apparatus and method for speech encoding based on short-term prediction valves

SONY CORP28 citations93

US5930758AJul 27, 1999

Audio signal reproducing apparatus with semiconductor memory storing coded digital audio data and including a headphone unit

SONY CORP46 citations93

US5926788AJul 20, 1999

Method and apparatus for reproducing speech signals and method for transmitting same

SONY CORP51 citations93

US5864796AJan 26, 1999

Speech synthesis with equal interval line spectral pair frequency interpolation

SONY CORP23 citations93

US5839110ANov 17, 1998

Transmitting and receiving apparatus

SONY CORP37 citations93

US5832437ANov 3, 1998

Continuous and discontinuous sine wave synthesis of speech signals from harmonic data of different pitch periods

SONY CORP56 citations93

US5771486AJun 23, 1998

Method for reducing noise in speech signal and method for detecting noise domain

SONY CORP21 citations93

US5630012AMay 13, 1997

Speech efficient coding method

SONY CORP41 citations93

US5475789ADec 12, 1995

Method of compressing an audio signal using adaptive bit allocation taking account of temporal masking

SONY CORP22 citations93

Showing the top 50 of 139 patents by PatentIndex Score.

NISHIGUCHI MASAYUKI

Patents

Method and apparatus for speech encoding and decoding by sinusoidal analysis and waveform encoding with phase reproducibility

Vector quantization method and speech encoding method and apparatus

Signal band expanding method and apparatus and signal synthesis method and apparatus

Speech decoding method and apparatus for selecting random noise codevectors as excitation signals for an unvoiced speech frame

Voice analysis-synthesis method using noise having diffusion which varies with frequency band to modify predicted phases of transmitted pitch data blocks

Voice encoding method and apparatus using modified discrete cosine transform

High efficiency encoding method

Audio signal reproducing apparatus

Speech signal transmitting and receiving apparatus with noise sensitive volume control

Information processing apparatus and method, and recording medium

Vector quantization method, speech encoding method and apparatus

Method and apparatus for decoding and changing the pitch of an encoded speech signal

Apparatus and method for encoding/decoding a speech signal using adaptively changing codebook vectors

Method based on pitch-strength for reducing noise in predetermined subbands of a speech signal

Method and device for discriminating voiced and unvoiced sounds

Method and apparatus for reducing noise in speech signal

Speech decoding method and apparatus

Speech encoding method, speech decoding method and speech encoding/decoding method

Method for reducing noise in speech signals by adaptively controlling a maximum likelihood filter for calculating speech components

Method and device for discriminating voiced and unvoiced sounds

Voiced/unvoiced decision based on frequency band ratio

Audio band width extending system and method

Voice encoding method and voice decoding method

Method and apparatus for encoding voice signals divided into a plurality of frequency bands

Signal processing device and signal processing method

Noise reducing method, noise reducing apparatus and telephone set

Signal processing method and apparatus, signal processing program, and recording medium

Method and apparatus for classifying signals, method and apparatus for generating descriptors and method and apparatus for retrieving signals

Audio signal reproducing apparatus

Encoding method, encoding apparatus, decoding method, decoding apparatus and program

Method and apparatus for classifying signals method and apparatus for generating descriptors and method and apparatus for retrieving signals

Audio signal reproducing apparatus

Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal

Reduced length infinite impulse response weighting

Audio signal reproducing apparatus

Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal

Phase quantization method and apparatus

Speech analysis method and speech encoding method and apparatus

Envelope-invariant speech coding based on sinusoidal analysis of LPC residuals and with pitch conversion of voiced speech

Method for reducing noise in speech signal and method for detecting noise domain

Detecting transients to emphasize formant peaks

Apparatus and method for speech encoding based on short-term prediction valves

Audio signal reproducing apparatus with semiconductor memory storing coded digital audio data and including a headphone unit

Method and apparatus for reproducing speech signals and method for transmitting same

Speech synthesis with equal interval line spectral pair frequency interpolation

Transmitting and receiving apparatus

Continuous and discontinuous sine wave synthesis of speech signals from harmonic data of different pitch periods

Method for reducing noise in speech signal and method for detecting noise domain

Speech efficient coding method

Method of compressing an audio signal using adaptive bit allocation taking account of temporal masking