MXPA02010770A - Aparato para codificar y aparato para descodificar. - Google Patents

Aparato para codificar y aparato para descodificar.

Info

Publication number
MXPA02010770A
MXPA02010770A MXPA02010770A MXPA02010770A MXPA02010770A MX PA02010770 A MXPA02010770 A MX PA02010770A MX PA02010770 A MXPA02010770 A MX PA02010770A MX PA02010770 A MXPA02010770 A MX PA02010770A MX PA02010770 A MXPA02010770 A MX PA02010770A
Authority
MX
Mexico
Prior art keywords
encoding
frequency
stream
code
band
Prior art date
Application number
MXPA02010770A
Other languages
English (en)
Inventor
Tsushima Mineo
Original Assignee
Matsushita Electric Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of MXPA02010770A publication Critical patent/MXPA02010770A/es

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals 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
    • G10L19/02—Speech or audio signals 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 using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—Speech or audio signals 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 using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • G10L19/0208—Subband vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals 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
    • G10L19/02—Speech or audio signals 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 using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Un aparato para codificar que incluye una seccion de codificacion de banda de ganancia para calcular una amplitud promedio de una corriente de espectro de frecuencia que corresponde a cada una de una pluralidad de bandas de frecuencia para generar un primer codigo que representa la amplitud promedio de la corriente de espectro de frecuencia; una seccion de determinacion de banda de codificacion para determinar por lo menos una banda de frecuencia, para la cual la corriente de espectro de frecuencia correspondiente debe ser cuantizada y codificada de entre la pluralidad de bandas de frecuencia; una seccion de codificacion de espectro para cuantizar y codificar la corriente de espectro de frecuencia de cada una de la por lo menos una banda de frecuencia determinada por la seccion de determinacion de banda de codificacion para generar un segundo codigo; y una seccion de generacion de corriente codificada para generar una corriente codificada con base en el primer codigo y en el segundo codigo.
MXPA02010770A 2001-03-02 2002-01-24 Aparato para codificar y aparato para descodificar. MXPA02010770A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001057746 2001-03-02
PCT/JP2002/000524 WO2002071395A2 (en) 2001-03-02 2002-01-24 Apparatus for coding scaling factors in an audio coder

Publications (1)

Publication Number Publication Date
MXPA02010770A true MXPA02010770A (es) 2004-09-06

Family

ID=18917573

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA02010770A MXPA02010770A (es) 2001-03-02 2002-01-24 Aparato para codificar y aparato para descodificar.

Country Status (7)

Country Link
US (1) US6922667B2 (es)
EP (1) EP1364364B1 (es)
CN (1) CN1232951C (es)
AU (1) AU2002226717B2 (es)
DE (1) DE60233032D1 (es)
MX (1) MXPA02010770A (es)
WO (1) WO2002071395A2 (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0103242D0 (en) * 2001-02-09 2001-03-28 Radioscape Ltd Method of analysing a compressed signal for the presence or absence of information content
JP3861770B2 (ja) * 2002-08-21 2006-12-20 ソニー株式会社 信号符号化装置及び方法、信号復号装置及び方法、並びにプログラム及び記録媒体
JP4657570B2 (ja) * 2002-11-13 2011-03-23 ソニー株式会社 音楽情報符号化装置及び方法、音楽情報復号装置及び方法、並びにプログラム及び記録媒体
US7650277B2 (en) * 2003-01-23 2010-01-19 Ittiam Systems (P) Ltd. System, method, and apparatus for fast quantization in perceptual audio coders
WO2005040749A1 (ja) * 2003-10-23 2005-05-06 Matsushita Electric Industrial Co., Ltd. スペクトル符号化装置、スペクトル復号化装置、音響信号送信装置、音響信号受信装置、およびこれらの方法
JP4899359B2 (ja) * 2005-07-11 2012-03-21 ソニー株式会社 信号符号化装置及び方法、信号復号装置及び方法、並びにプログラム及び記録媒体
RU2464650C2 (ru) * 2006-12-13 2012-10-20 Панасоник Корпорэйшн Устройство и способ кодирования, устройство и способ декодирования
CN101548318B (zh) * 2006-12-15 2012-07-18 松下电器产业株式会社 编码装置、解码装置以及其方法
KR101411900B1 (ko) * 2007-05-08 2014-06-26 삼성전자주식회사 오디오 신호의 부호화 및 복호화 방법 및 장치
AU2009267459B2 (en) * 2008-07-11 2014-01-23 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Audio encoder, audio decoder, methods for encoding and decoding an audio signal, audio stream and computer program
JP6035270B2 (ja) * 2014-03-24 2016-11-30 株式会社Ｎｔｔドコモ 音声復号装置、音声符号化装置、音声復号方法、音声符号化方法、音声復号プログラム、および音声符号化プログラム
EP2980801A1 (en) 2014-07-28 2016-02-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for estimating noise in an audio signal, noise estimator, audio encoder, audio decoder, and system for transmitting audio signals
US10033709B1 (en) * 2017-11-20 2018-07-24 Microsoft Technology Licensing, Llc Method and apparatus for improving privacy of communications through channels having excess capacity

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3196595B2 (ja) * 1995-09-27 2001-08-06 日本電気株式会社 音声符号化装置
US5692102A (en) * 1995-10-26 1997-11-25 Motorola, Inc. Method device and system for an efficient noise injection process for low bitrate audio compression
DE19730130C2 (de) * 1997-07-14 2002-02-28 Fraunhofer Ges Forschung Verfahren zum Codieren eines Audiosignals
JP3319396B2 (ja) * 1998-07-13 2002-08-26 日本電気株式会社 音声符号化装置ならびに音声符号化復号化装置
JP2001075600A (ja) * 1999-09-07 2001-03-23 Mitsubishi Electric Corp 音声符号化装置および音声復号化装置

Also Published As

Publication number Publication date
EP1364364B1 (en) 2009-07-22
WO2002071395A2 (en) 2002-09-12
CN1461468A (zh) 2003-12-10
WO2002071395A3 (en) 2002-11-21
CN1232951C (zh) 2005-12-21
AU2002226717B2 (en) 2004-05-06
EP1364364A2 (en) 2003-11-26
US20020152085A1 (en) 2002-10-17
DE60233032D1 (de) 2009-09-03
US6922667B2 (en) 2005-07-26

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