Patent ID: 6058361
Filing Date: 2000-05-02
Classification: G10L

Abstract:
System for the coding of a signal to be coded, of the type that delivers a global flow made up of a primary flow that corresponds to a coding of the input flow, called primary coding, and of a secondary flow corresponding to a secondary coding, the coding delay of said primary coding being inferior to that of the secondary coding, characterized in that it comprises a filterbank (10) provided to receive said input flow (FE) to be coded and to develop signals in different bands, respectively, coders called primary coders (20.sub.1 to 20.sub.4) to code said signals into sub-bands, respectively and thus form primary flows (TP), decoders (40.sub.1 to 40.sub.4) that receive said primary flows (TP) and that decode these flows, subtractors (50.sub.1 to 50.sub.4) each one of which is provided to perform the difference between the signals delivered by the filterbank (10) into each sub-band and the signals delivered by the corresponding decoder (40.sub.1 to 40.sub.4), a coder 70 called secondary coder, to perform the coding of the signals issued from the subtractors (40.sub.1 to 40.sub.4), and thus to develop a secondary flow (TS), and a multiplexer (30) to multiplex into a single global flow (TG) the primary flows (TP) issued from the primary coders (20.sub.1 to 20.sub.4) and the secondary flow (TS) issued from the secondary coder (70).