EP 0891617 B1 19991124 - SIGNAL CODING AND DECODING SYSTEM, PARTICULARLY FOR A DIGITAL AUDIO SIGNAL
Title (en)
SIGNAL CODING AND DECODING SYSTEM, PARTICULARLY FOR A DIGITAL AUDIO SIGNAL
Title (de)
SYSTEM ZUR KODIERUNG UND DEKODIERUNG EINES SIGNALS, INSBESONDERE EINES DIGITALEN AUDIOSIGNALS
Title (fr)
SYSTEME DE CODAGE ET SYSTEME DE DECODAGE D'UN SIGNAL, NOTAMMENT D'UN SIGNAL AUDIONUMERIQUE
Publication
Application
Priority
- FR 9700582 W 19970402
- FR 9604483 A 19960403
Abstract (en)
[origin: FR2747225A1] A coding system for a signal to be coded, of a type that delivers a global flow consisting of a primary flow corresponding to the so-called primary coding of an incoming flow, and of a secondary flow corresponding to a secondary coding is disclosed, wherein the coding delay of the primary coding is shorter than that of the secondary coding. The invention is characterised in that it includes a filter bank (10) for receiving said incoming flow (FE) to be coded and for generating signals in different sub-bands respectively, so-called primary coders (20>1< to 20>4<), for coding said sub-band signals respectively and forming primary flows (TP), decoders (40>1< - 40>4<) receiving and decoding the primary flows (TP), subtractors (50>1< - 50>4<), each of which provides to produce the difference between the signals delivered by the filter bank (10) in each sub-band and the signals delivered by the corresponding decoder (50>1< - 50>4<), a so-called secondary coder (70) for coding the signals from the subtractors (50>1< - 50>4<) and generating a secondary flow (TS), and a multiplexer (30) for multiplexing into a single global flow (TG) the primary flows (TP) from the primary coders (20>1< - 20>4<) and the secondary flow (TS) from the secondary coder (70). A multiplexing method used in such a coding and decoding system is also disclosed.
IPC 1-7
IPC 8 full level
G10L 19/16 (2013.01); G10L 25/18 (2013.01)
CPC (source: EP US)
G10L 19/16 (2013.01 - EP US); G10L 25/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
FR 2747225 A1 19971010; FR 2747225 B1 19980430; DE 69700837 D1 19991230; DE 69700837 T2 20000720; EP 0891617 A1 19990120; EP 0891617 B1 19991124; US 6058361 A 20000502; WO 9738417 A1 19971016
DOCDB simple family (application)
FR 9604483 A 19960403; DE 69700837 T 19970402; EP 97919457 A 19970402; FR 9700582 W 19970402; US 15516899 A 19990427