EP 0801790 B1 19990512 - 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 9600006 W 19960103
- FR 9500135 A 19950106
Abstract (en)
[origin: WO9621220A1] A speech signal linear prediction analysis is performed for each frame of a speech signal to determine the coefficients of a short-term synthesis filter, and an open-loop analysis is performed to determine a degree of frame voicing. At least one closed-loop analysis is performed for each sub-frame to determine an excitation sequence which, when applied to the short-term synthesis filter, generates a synthetic signal representative of the speech signal. Each closed-loop analysis uses the impulse response of a filter consisting of the short-term synthesis filter and a perceptual weighting filter, by truncating said impulse response to a truncation length that is no greater than the number of samples per sub-frame, and dependent on the energy distribution of said response and the degree of voicing of the frame.
IPC 1-7
IPC 8 full level
G10L 19/083 (2013.01); G10L 19/10 (2013.01); G10L 25/24 (2013.01); G10L 25/93 (2013.01)
CPC (source: EP US)
G10L 19/083 (2013.01 - EP US); G10L 19/10 (2013.01 - EP US); G10L 25/24 (2013.01 - EP US); G10L 25/93 (2013.01 - EP US); G10L 2019/0003 (2013.01 - EP US); G10L 2019/0011 (2013.01 - EP US); G10L 2019/0012 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9621220 A1 19960711; AT E180092 T1 19990515; AU 4490396 A 19960724; AU 697892 B2 19981022; BR 9606887 A 19971028; CA 2209623 A1 19960711; CN 1173938 A 19980218; DE 69602421 D1 19990617; DE 69602421 T2 19991223; EP 0801790 A1 19971022; EP 0801790 B1 19990512; FR 2729247 A1 19960712; FR 2729247 B1 19970307; US 5963898 A 19991005
DOCDB simple family (application)
FR 9600006 W 19960103; AT 96901010 T 19960103; AU 4490396 A 19960103; BR 9606887 A 19960103; CA 2209623 A 19960103; CN 96191793 A 19960103; DE 69602421 T 19960103; EP 96901010 A 19960103; FR 9500135 A 19950106; US 86074697 A 19971022