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1. WO2005096273 - ENHANCED AUDIO ENCODING/DECODING DEVICE AND METHOD

Publication Number WO/2005/096273
Publication Date 13.10.2005
International Application No. PCT/CN2005/000440
International Filing Date 01.04.2005
IPC
G10L 19/032 2013.01
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 19/032
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
Applicants
  • BEIJING MEDIA WORKS CO., LTD [CN]/[CN] (AllExceptUS)
  • BEIJING E-WORLD TECHNOLOGY CO., LTD. [CN]/[CN] (AllExceptUS)
  • CODING TECHNOLOGIES AB [SE]/[SE] (AllExceptUS)
  • PAN, Xingde [CN]/[CN] (UsOnly)
  • MARTIN, Dietz [DE]/[DE] (UsOnly)
Inventors
  • PAN, Xingde
  • MARTIN, Dietz
  • EHRET, Andreas
  • HÖRICH, Holger
  • ZHU, Xiaoming
  • SCHUG, Michael
  • REN, Weimin
  • WANG, Lei
  • DENG, Hao
  • HENN, Fredrik
Agents
  • LEADER PATENT & TRADEMARK FIRM
Priority Data
200410030946.901.04.2004CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) ENHANCED AUDIO ENCODING/DECODING DEVICE AND METHOD
(FR) AMELIORATIONS APPORTEES A UN PROCEDE ET UN DISPOSITIF DE CODAGE/DECODAGE AUDIO
Abstract
(EN)
An enhanced audio encoding device is consisted of a psychoacoustical analyzing module, a time-frequency mapping module, a quantization and entropy encoding module, a bit-stream multiplexing module, a signal characteristic analyzing module and a multi-resolution analyzing module, in which the signal characteristic analyzing module is configured to analyze the signal type of the input audio signal, the psychoacoustical analyzing module calculates a masking threshold and a signal-to-masking ratio of the audio signal, and outputs to said quantization and entropy encoding module, the multi-resolution analyzing module is configured to perform an analysis of the multi-resolution based on the signal type, the quantization and entropy encoding module performs a quantization and an entropy encoding of the frequency-domain coefficients under the control of the signal-to-masking ratio, and the bit-stream multiplexing module forms an audio encoding code stream. The device can support the ratio signal whose sampling rate is between 8kHz and 192kHz.
(FR)
L'invention concerne un dispositif de codage audio amélioré comprenant un module d'analyse psychoacoustique, un module de mappage temporel/fréquentiel, un module de quantification et de codage entropique, un module de multiplexage de trains de bits, un module d'analyse de caractéristiques de signal et un module d'analyse multirésolution. Le module d'analyse de caractéristiques de signal est configuré pour analyser le type de signal audio entré. Le module d'analyse psychoacoustique calcule un seuil de masquage ainsi qu'un rapport signal/masquage du signal radio, qu'il envoie au module de quantification et de codage entropique. Le module d'analyse multirésolution est configuré pour effectuer une analyse multirésolution sur la base du type de signal. Le module de quantification et de codage entropique réalise une quantification et un codage entropique des coefficients de domaine de fréquence en fonction du rapport signal/masquage. Le module de multiplexage de trains de bits forme un flux de codes pour le codage audio. Ce dispositif peut supporter un signal audio dont la fréquence d'échantillonnage est comprise entre 8 kHz et 192 kHz
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