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1. WO2011118977 - PROCÉDÉ ET APPAREIL PERMETTANT DE TRAITER UN SIGNAL AUDIO

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Numéro de publication WO/2011/118977
Date de publication 29.09.2011
N° de la demande internationale PCT/KR2011/001989
Date du dépôt international 23.03.2011
CIB
G10L 19/12 2006.1
GPHYSIQUE
10INSTRUMENTS DE MUSIQUE; ACOUSTIQUE
LANALYSE OU SYNTHÈSE DE LA PAROLE; RECONNAISSANCE DE LA PAROLE; TRAITEMENT DE LA PAROLE OU DE LA VOIX; CODAGE OU DÉCODAGE DE LA PAROLE OU DE SIGNAUX AUDIO
19Techniques d'analyse ou de synthèse de la parole ou des signaux audio pour la réduction de la redondance, p.ex. dans les vocodeurs; Codage ou décodage de la parole ou des signaux audio utilisant les modèles source-filtre ou l’analyse psychoacoustique
04utilisant des techniques de prédiction
08Détermination ou codage de la fonction d'excitation; Détermination ou codage des paramètres de prédiction à long terme
12la fonction d’excitation étant l’excitation codée, p.ex. dans les vocodeurs à prédiction linéaire excités par code
CPC
G10L 19/00
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
G10L 19/002
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
002Dynamic bit allocation
G10L 19/02
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
02using spectral analysis, e.g. transform vocoders or subband vocoders
G10L 19/032
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
02using spectral analysis, e.g. transform vocoders or subband vocoders
032Quantisation or dequantisation of spectral components
G10L 19/04
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
G10L 19/06
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech 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
04using predictive techniques
06Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
Déposants
  • 엘지전자 주식회사 LG ELECTRONICS INC. [KR]/[KR] (AllExceptUS)
  • 정규혁 JEONG, Gyuhyeok [KR]/[KR] (UsOnly)
  • 김대환 KIM, Daehwan [KR]/[KR] (UsOnly)
  • 이창헌 LEE, Changheon [KR]/[KR] (UsOnly)
  • 김락용 KIM, Lagyoung [KR]/[KR] (UsOnly)
  • 전혜정 JEON, Hyejeong [KR]/[KR] (UsOnly)
  • 이병석 LEE, Byungsuk [KR]/[KR] (UsOnly)
  • 강인규 KANG, Ingyu [KR]/[KR] (UsOnly)
Inventeurs
  • 정규혁 JEONG, Gyuhyeok
  • 김대환 KIM, Daehwan
  • 이창헌 LEE, Changheon
  • 김락용 KIM, Lagyoung
  • 전혜정 JEON, Hyejeong
  • 이병석 LEE, Byungsuk
  • 강인규 KANG, Ingyu
Mandataires
  • 김용인 KIM, Yong In
Données relatives à la priorité
61/316,39023.03.2010US
61/451,56410.03.2011US
Langue de publication Coréen (ko)
Langue de dépôt coréen (KO)
États désignés
Titre
(EN) METHOD AND APPARATUS FOR PROCESSING AN AUDIO SIGNAL
(FR) PROCÉDÉ ET APPAREIL PERMETTANT DE TRAITER UN SIGNAL AUDIO
(KO) 오디오 신호 처리 방법 및 장치
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Abrégé
(EN) The present invention relates to a method for processing an audio signal, comprising the following steps: performing a spectrum analysis of the current frame of the audio signal to determine bandwidth information that indicates to which of a plurality of bands including a first band and a second band the current frame corresponds; determining information on the order corresponding to the present frame on the basis of the bandwidth information; performing a linear predictive analysis of the present frame to generate a first set linear predictive transform coefficient of a first order; performing a vector quantization on the first set linear predictive coefficient to generate a first set index; performing a linear predictive analysis of the current frame to generate a second set linear predictive transform coefficient of a second order in accordance with the information on the order; and performing a vector quantization on a second set difference by using the first set index and the second set linear predictive transform coefficient, when the second set linear predictive coefficient is generated.
(FR) La présente invention concerne un procédé permettant de traiter un signal audio, comprenant les étapes suivantes consistant à : exécuter une analyse de spectre de la trame courante du signal audio pour déterminer des informations de bande passante qui indiquent à quelle bande parmi une pluralité de bandes incluant une première bande et une deuxième bande la trame courante correspond ; déterminer des informations sur l'ordre correspondant à la présente trame sur la base des informations de bande passante ; exécuter une analyse prédictive linéaire de la présente trame pour générer un premier coefficient de transformation prédictive linéaire estimé d'un premier ordre ; exécuter une quantification vectorielle sur le premier coefficient prédictif linéaire estimé pour générer un premier index estimé ; exécuter une analyse prédictive linéaire de la trame courante pour générer un deuxième coefficient de transformation prédictive linéaire estimé d'un deuxième ordre selon les informations relatives à l'ordre ; et exécuter une quantification vectorielle sur une deuxième différence estimée en utilisant le premier index estimé et le deuxième coefficient de transformation prédictive linéaire estimé, lorsque le deuxième coefficient prédictif linéaire estimé est généré.
(KO) 본 발명은 오디오 신호의 현재 프레임에 대해서 스펙트럼 분석을 수행함으로써, 상기 현재 프레임이 제1 대역 및 제2 대역을 복수의 대역들 중 어디에 해당하는지를 나타내는 대역폭 정보를 결정하는 단계; 상기 대역폭 정보를 근거로, 현재 프레임에 대응하는 차수 정보를 결정하는 단계; 상기 현재 프레임에 대해 선형-예측 분석을 수행함으로써, 제1 차수의 제1셋 선형-예측 변환 계수를 생성하는 단계; 상기 제1 셋 선형-예측 변환 계수를 벡터-양자화함으로써, 제1셋 인덱스를 생성하는 단계; 상기 현재 프레임에 대해 선형-예측 분석을 수행함으로써, 상기 차수 정보에 따라서, 제2 차수의 제2 셋 선형-예측 변환 계수를 생성하는 단계; 및, 상기 제2 셋 선형-예측 변환 계수가 생성된 경우, 상기 제1 셋 인덱스 및 상기 제2 셋 선형-예측 변환 계수를 이용하여 제2셋 차분에 대해 벡터-양자화를 수행하는 단계를 포함하는 오디오 신호 처리 방법을 개시한다.
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