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1. WO2009006819 - FIXED CODEBOOK SEARCH METHOD, SEARCHER AND COMPUTER READABLE MEDIUM

Publication Number WO/2009/006819
Publication Date 15.01.2009
International Application No. PCT/CN2008/071485
International Filing Date 30.06.2008
IPC
G10L 19/08 2006.01
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
04using predictive techniques
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
CPC
G10L 19/10
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
08Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
10the excitation function being a multipulse excitation
G10L 2019/0013
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
0001Codebooks
0013Codebook search algorithms
Applicants
  • 华为技术有限公司 HUAWEI TECHNOLOGIES CO., LTD. [CN]/[CN] (AllExceptUS)
  • 张德军 ZHANG, Dejun [CN]/[CN] (UsOnly)
  • 李立雄 LI, Lixiong [CN]/[CN] (UsOnly)
Inventors
  • 张德军 ZHANG, Dejun
  • 李立雄 LI, Lixiong
Agents
  • 北京集佳知识产权代理有限公司 UNITALEN ATTORNEYS AT LAW
Priority Data
200710130517.211.07.2007CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) FIXED CODEBOOK SEARCH METHOD, SEARCHER AND COMPUTER READABLE MEDIUM
(FR) PROCÉDÉ DE RECHERCHE DE LIVRE DE CODE FIXE, SYSTÈME DE RECHERCHE ET SUPPORT LISIBLE PAR ORDINATEUR
(ZH) 固定码书搜索方法、搜索器及计算机可读介质
Abstract
(EN)
Fixed codebook search method and fixed codebook searcher are provided. Basic codebook is acquired, said basic codebook comprising position information of N pulses on M tracks, where N, M are positive integers. n pulses are chosen from said Ns pulses as search pulses, said Ns pulses being a whole or a part of N pulses, where Ns is positive integer not more than N, n is positive integer less than Ns. Positions of said n search pulses are respectively replaced by other positions on the tracks to acquire search codebook. Said search process is implemented K times, where K is positive integer not less than two, two or more search pulses are chosen in at least one search process, all said search pulses are not the same. The loop optimal codebook is chosen from said basic codebook and search codebook in the preset estimate criterion.
(FR)
La présente invention concerne un procédé de recherche de livre de code fixe et un système de recherche de livre de code fixe. Un livre de code de base est acquis, comprenant des informations de position de N impulsions sur M pistes, N et M étant des entiers positifs. n impulsions sont choisies à partir des N impulsions sous forme d'impulsions de recherche, les N impulsions constituant tout ou partie de N impulsions, N étant un entier positif inférieur à N, n étant un entier positif inférieur à N. Les positions des n impulsions de recherche sont respectivement remplacées par d'autres positions sur les pistes pour acquérir un livre de code de recherche. Le procédé de recherche est implémenté K fois, K étant un entier positif inférieur à deux, deux ou plusieurs impulsions de recherche sont choisies dans au moins une procédé de recherche, toutes ces impulsions de recherche ne sont pas identiques. Le livre de code optimal de boucle est choisi dans le livre de code de base et le livre de code de recherche dans le critère d'estimation prédéfini.
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