EP 0801790 A1 19971022 - 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)
Citation (search report)
See references of WO 9621220A1
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