EP 0801788 B1 19990609 - SPEECH CODING METHOD USING SYNTHESIS ANALYSIS
Title (en)
SPEECH CODING METHOD USING SYNTHESIS ANALYSIS
Title (de)
VERFAHREN ZUR SPRACHKODIERUNG MITTELS ANALYSE DURCH SYNTHESE
Title (fr)
PROCEDE DE CODAGE DE PAROLE A ANALYSE PAR SYNTHESE
Publication
Application
Priority
- FR 9600004 W 19960103
- FR 9500134 A 19950106
Abstract (en)
[origin: WO9621218A1] A method comprising the steps of performing a linear prediction analysis of a speech signal (S) digitised in a series of frames divided into sub-frames, in order to determine the parameters of a short-term synthesis filter; carrying out an open loop analysis to detect voiced signal frames and determine, for each voiced frame, a degree of signal voicing (MV) and a long-term prediction delay search interval containing a number of delays depending on the degree of voicing; carrying out a closed-loop predictive analysis of the speech signal to select, for at least some sub-frames of the voiced frames, a long-term prediction delay contained in the search interval and constituting a long-term synthesis filter parameter; and determining a stochastic excitation for each sub-frame, to minimise a perceptually weighted deviation between the speech signal and the stochastic excitation filtered by the long-term and short-term synthesis filters.
IPC 1-7
IPC 8 full level
G10L 13/00 (2006.01); G10L 19/09 (2013.01); G10L 25/93 (2013.01)
CPC (source: EP US)
G10L 19/09 (2013.01 - EP US); G10L 25/93 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9621218 A1 19960711; AT E181170 T1 19990615; AU 4490196 A 19960724; AU 704229 B2 19990415; CA 2209384 A1 19960711; CA 2209384 C 20010529; CN 1145143 C 20040407; CN 1173939 A 19980218; DE 69602822 D1 19990715; DE 69602822 T2 19991223; EP 0801788 A1 19971022; EP 0801788 B1 19990609; FR 2729246 A1 19960712; FR 2729246 B1 19970307; US 5974377 A 19991026
DOCDB simple family (application)
FR 9600004 W 19960103; AT 96901008 T 19960103; AU 4490196 A 19960103; CA 2209384 A 19960103; CN 96191794 A 19960103; DE 69602822 T 19960103; EP 96901008 A 19960103; FR 9500134 A 19950106; US 86067397 A 19971014