WO2000019413 MULTI-CHANNEL SIGNAL ENCODING AND DECODING

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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

CPC

Applicants

TELEFONAKTIEBOLAGET LM ERICSSON (publ) [SE]/[SE]

Inventors

MINDE, Tor, Björn

Agents

MRAZEK, Werner

Priority Data

9803321-0

30.09.1998

Publication Language English (en)

Filing Language English (EN)

Designated States

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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.

G	PHYSICS
10	MUSICAL INSTRUMENTS; ACOUSTICS
L	SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19	Speech 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
04	using predictive techniques
16	Vocoder architecture

H	ELECTRICITY
03	BASIC ELECTRONIC CIRCUITRY
M	CODING, DECODING OR CODE CONVERSION, IN GENERAL
7	Conversion 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
30	Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

H	ELECTRICITY
03	BASIC ELECTRONIC CIRCUITRY
M	CODING, DECODING OR CODE CONVERSION, IN GENERAL
7	Conversion 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
30	Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
36	Conversion to or from differential modulation with several bits, i.e. the difference between successive samples being coded by more than one bit

H	ELECTRICITY
04	ELECTRIC COMMUNICATION TECHNIQUE
S	STEREOPHONIC SYSTEMS
3	Systems employing more than two channels, e.g. quadraphonic

G	PHYSICS
10	MUSICAL INSTRUMENTS; ACOUSTICS
L	SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19	Speech 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
04	using predictive techniques
16	Vocoder architecture

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1. WO2000019413 - MULTI-CHANNEL SIGNAL ENCODING AND DECODING