ES2164414T3 - Metodo y aparato para codificacion de audio. - Google Patents

Metodo y aparato para codificacion de audio.

Info

Publication number
ES2164414T3
ES2164414T3 ES98904191T ES98904191T ES2164414T3 ES 2164414 T3 ES2164414 T3 ES 2164414T3 ES 98904191 T ES98904191 T ES 98904191T ES 98904191 T ES98904191 T ES 98904191T ES 2164414 T3 ES2164414 T3 ES 2164414T3
Authority
ES
Spain
Prior art keywords
audio signal
signal
quantized
generate
frequency
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES98904191T
Other languages
English (en)
Inventor
Lin Yin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oyj
Original Assignee
Nokia Mobile Phones 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 Nokia Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Application granted granted Critical
Publication of ES2164414T3 publication Critical patent/ES2164414T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 predictive techniques
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/04—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 predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation

Abstract

UN PROCEDIMIENTO DE CODIFICACION DE UNA SEÑAL DE AUDIO QUE CONSISTE EN RECIBIR UNA SEÑAL DE AUDIO X A CODIFICAR Y TRANSFORMAR LA SEÑAL RECIBIDA DEL DOMINIO DE TIEMPO AL DE FRECUENCIA. SE GENERA UNA SEÑAL DE AUDIO CUANTIZADA A PARTIR DE LA SEÑAL DE AUDIO TRANSFORMADA X JUNTO CON UNA SERIE DE COEFICIENTES DE PREDICCION A LARGO PLAZO A QUE SE PUEDEN UTILIZAR PARA PREDECIR UN CUADRO TEMPORAL ACTUAL DE LA SEÑAL DE AUDIO RECIBIDA DIRECTAMENTE A PARTIR DE UNO O MAS CUADROS TEMPORALES ANTERIORES DE LA SEÑAL DE AUDIO CUANTIZADA X. SE GENERA UNA SEÑAL DE AUDIO PRONOSTICADA X UTILIZANDO LOS COEFICIENTES DE PREDICCION A. A CONTINUACION SE TRANSFORMA LA SEÑAL DE AUDIO PRONOSTICADA DEL DOMINIO DE TIEMPO AL DE FRECUENCIA Y LA SEÑAL DE DOMINIO DE FRECUENCIA RESULTANTE SE COMPARA CON LA DE LA SEÑAL DE AUDIO RECIBIDA X PARA GENERAR UNA SEÑAL DE ERROR E(K) PARA CADA UNA DE UNA PLURALIDAD DE SUBBANDAS DE FRECUENCIA. A CONTINUACION SE CUANTIZAN LAS SEÑALES DE ERROR E(K) PARA GENERAR UNA SERIE DE SEÑALES DE ERROR CUANTIZADAS E(K) QUE SE COMBINAN CON LOS COEFICIENTES DE PREDICCION A PARA GENERAR UNA SEÑAL DE AUDIO CODIFICADA.
ES98904191T 1997-03-14 1998-02-18 Metodo y aparato para codificacion de audio. Expired - Lifetime ES2164414T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI971108A FI114248B (fi) 1997-03-14 1997-03-14 Menetelmä ja laite audiokoodaukseen ja audiodekoodaukseen

Publications (1)

Publication Number Publication Date
ES2164414T3 true ES2164414T3 (es) 2002-02-16

Family

ID=8548401

Family Applications (1)

Application Number Title Priority Date Filing Date
ES98904191T Expired - Lifetime ES2164414T3 (es) 1997-03-14 1998-02-18 Metodo y aparato para codificacion de audio.

Country Status (13)

Country Link
US (2) US6721700B1 (es)
EP (1) EP0966793B1 (es)
JP (2) JP3391686B2 (es)
KR (1) KR100469002B1 (es)
CN (1) CN1135721C (es)
AU (1) AU733156B2 (es)
DE (1) DE19811039B4 (es)
ES (1) ES2164414T3 (es)
FI (1) FI114248B (es)
FR (1) FR2761801B1 (es)
GB (1) GB2323759B (es)
SE (1) SE521129C2 (es)
WO (1) WO1998042083A1 (es)

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US8599925B2 (en) 2005-08-12 2013-12-03 Microsoft Corporation Efficient coding and decoding of transform blocks
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US8184710B2 (en) 2007-02-21 2012-05-22 Microsoft Corporation Adaptive truncation of transform coefficient data in a transform-based digital media codec
US20100292986A1 (en) * 2007-03-16 2010-11-18 Nokia Corporation encoder
US7774205B2 (en) 2007-06-15 2010-08-10 Microsoft Corporation Coding of sparse digital media spectral data
CN101075436B (zh) * 2007-06-26 2011-07-13 北京中星微电子有限公司 带补偿的音频编、解码方法及装置
US20090048827A1 (en) * 2007-08-17 2009-02-19 Manoj Kumar Method and system for audio frame estimation
ATE500588T1 (de) * 2008-01-04 2011-03-15 Dolby Sweden Ab Audiokodierer und -dekodierer
WO2009132662A1 (en) * 2008-04-28 2009-11-05 Nokia Corporation Encoding/decoding for improved frequency response
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Also Published As

Publication number Publication date
US7194407B2 (en) 2007-03-20
GB9805294D0 (en) 1998-05-06
JP2003140697A (ja) 2003-05-16
FR2761801A1 (fr) 1998-10-09
DE19811039B4 (de) 2005-07-21
FR2761801B1 (fr) 1999-12-31
CN1195930A (zh) 1998-10-14
EP0966793A1 (en) 1999-12-29
US6721700B1 (en) 2004-04-13
AU733156B2 (en) 2001-05-10
US20040093208A1 (en) 2004-05-13
WO1998042083A1 (en) 1998-09-24
KR20000076273A (ko) 2000-12-26
AU6216498A (en) 1998-10-12
KR100469002B1 (ko) 2005-01-29
SE9800776D0 (sv) 1998-03-10
CN1135721C (zh) 2004-01-21
EP0966793B1 (en) 2001-09-19
GB2323759B (en) 2002-01-16
FI971108A0 (fi) 1997-03-14
SE521129C2 (sv) 2003-09-30
JP3391686B2 (ja) 2003-03-31
SE9800776L (sv) 1998-09-15
DE19811039A1 (de) 1998-09-17
JPH10282999A (ja) 1998-10-23
FI114248B (fi) 2004-09-15
FI971108A (fi) 1998-09-15
GB2323759A (en) 1998-09-30

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