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1. WO2011122875 - ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE

Publication Number WO/2011/122875
Publication Date 06.10.2011
International Application No. PCT/KR2011/002227
International Filing Date 31.03.2011
IPC
G10L 19/005 2013.1
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
005Correction of errors induced by the transmission channel, if related to the coding algorithm
G10L 19/02 2013.1
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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 2013.1
GPHYSICS
10MUSICAL INSTRUMENTS; ACOUSTICS
LSPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19Speech or audio signal 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
CPC
G10L 19/0017
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
0017Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
G10L 19/0212
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
0212using orthogonal transformation
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 19/24
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
16Vocoder architecture
18Vocoders using multiple modes
24Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
Applicants
  • 한국전자통신연구원 ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE [KR]/[KR] (AllExceptUS)
  • 성종모 SUNG, Jongmo [KR]/[KR] (UsOnly)
  • 김현우 KIM, Hyun Woo [KR]/[KR] (UsOnly)
  • 배현주 BAE, Hyun Joo [KR]/[KR] (UsOnly)
Inventors
  • 성종모 SUNG, Jongmo
  • 김현우 KIM, Hyun Woo
  • 배현주 BAE, Hyun Joo
Agents
  • 팬코리아특허법인 PANKOREA PATENT AND LAW FIRM
Priority Data
10-2010-002930231.03.2010KR
10-2011-002934031.03.2011KR
Publication Language Korean (ko)
Filing Language Korean (KO)
Designated States
Title
(EN) ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE
(FR) PROCÉDÉ ET DISPOSITIF DE CODAGE, ET PROCÉDÉ ET DISPOSITIF DE DÉCODAGE
(KO) 부호화 방법 및 장치, 그리고 복호화 방법 및 장치
Abstract
(EN) Disclosed is an encoding method of an encoder. The encoder generates a first MDCT coefficient by converting an input signal, and generates an MDCT index by quantizing the first MDCT coefficient. The encoder generates a second MDCT coefficient by inversely quantizing the MDCT index, and calculates an MDCT error coefficient by a difference between the first MDCT coefficient and the second MDCT coefficient. Next, said encoder generates an error index by encoding the MDCT error coefficient, and generates a gain index corresponding to a gain of the first MDCT coefficient from the first MDCT coefficient and the second MDCT coefficient.
(FR) Un procédé de codage d'un codeur est décrit. Le codeur génère un premier coefficient MDCT en convertissant un signal d'entrée, et génère un index MDCT en quantifiant le premier coefficient MDCT. Le codeur génère un deuxième coefficient MDCT en effectuant une quantification inverse de l'index MDCT, et calcule un coefficient d'erreur MDCT par une différence entre le premier coefficient MDCT et le deuxième coefficient MDCT. Puis, ledit codeur génère un indice d'erreur en codant le coefficient d'erreur MDCT, et génère un indice de gain correspondant à un gain du premier coefficient MDCT à partir du premier coefficient MDCT et du deuxième coefficient MDCT.
(KO) 부호화기의 부호화 방법이 제공된다. 부호화기는 입력 신호를 변환하여 제1 MDCT 계수를 생성하고, 제1 MDCT 계수를 양자화하여 MDCT 인덱스를 생성한다. 부호화기는 MDCT 인덱스를 역 양자화하여 제2 MDCT 계수를 생성하고, 제1 MDCT 계수와 제2 MDCT 계수의 차로 MDCT 오류 계수를 계산한다. 다음 부호화기는 MDCT 오류 계수를 부호화하여 오류 인덱스를 생성하고, 제1 MDCT 계수와 제2 MDCT 계수로부터 제1 MDCT 계수의 이득에 대응하는 이득 인덱스를 생성한다.
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