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1. WO2000019413 - MULTI-CHANNEL SIGNAL ENCODING AND DECODING

Publication Number WO/2000/019413
Publication Date 06.04.2000
International Application No. PCT/SE1999/001610
International Filing Date 15.09.1999
Chapter 2 Demand Filed 11.04.2000
IPC
G10L 19/16 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
04using predictive techniques
16Vocoder architecture
H03M 7/30 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
H03M 7/36 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
7Conversion of a code where information is represented by a given sequence or number of digits to a code where the same information is represented by a different sequence or number of digits
30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
36Conversion to or from differential modulation with several bits, i.e. the difference between successive samples being coded by more than one bit
H04S 3/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
SSTEREOPHONIC SYSTEMS
3Systems employing more than two channels, e.g. quadraphonic
CPC
G10L 19/008
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
008Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
G10L 19/16
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
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (publ) [SE]/[SE]
Inventors
  • MINDE, Tor, Björn
Agents
  • MRAZEK, Werner
Priority Data
9803321-030.09.1998SE
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) MULTI-CHANNEL SIGNAL ENCODING AND DECODING
(FR) CODAGE ET DECODAGE DE SIGNAUX MULTI-CANAUX
Abstract
(EN) A multi-channel signal encoder includes an analysis part with an analysis filter block having a matrix-valued transfer function with at least one non-zero non-diagonal element. The corresponding synthesis part includes a synthesis filter block (12M) having the inverse matrix-valued transfer function. This arrangement reduces both intra-channel redundancy and inter-channel redundancy in linear predictive analysis-by-synthesis signal encoding.
(FR) L'invention concerne un codeur de signaux multi-canaux comprenant une section d'analyse pourvue d'un bloc filtrant d'analyse présentant une fonction de transfert valorisée par matrice avec au moins un élément non diagonal et non nul. La section de synthèse correspondante est pourvue d'un bloc filtrant de synthèse (12M) présentant la fonction de transfert valorisée par matrice inverse. Cet arrangement permet de réduire à la fois la redondance à l'intérieur d'un canal et la redondance entre les canaux par codage prédictif linéaire des signaux utilisant une analyse par voie synthétique.
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