EP 1125283 B1 20020807 - METHOD FOR QUANTIZING SPEECH CODER PARAMETERS
Title (en)
METHOD FOR QUANTIZING SPEECH CODER PARAMETERS
Title (de)
VERFAHREN ZUR QUANTISIERUNG DER PARAMETER EINES SPRACHKODIERERS
Title (fr)
PROCEDE DE QUANTIFICATION DES PARAMETRES D'UN CODEUR DE PAROLE
Publication
Application
Priority
- FR 9902348 W 19991001
- FR 9812500 A 19981006
Abstract (en)
[origin: US6687667B1] A method for encoding speech at a low bit rate. The method assembles parameters on N consecutive frames to form a super-frame. A vector quantization of transition frequencies of a voicing during each super-frame is made. Only the most frequent configurations are transmitted without deterioration and the least frequent configurations are replaced by the configuration that is the nearest in terms of absolute error among most frequent configurations. The pitch is encoded in carrying out a scalar quantization of only one value of the pitch for each super-frame. The energy is encoded in selecting only a reduced number of values in assembling these values in sub-packets quantized by vector quantization. The spectral envelope parameters are encoded by vector quantization in selecting only a determined number of filters. The untransmitted energy values are recovered in the synthesis part by interpolation or extrapolation from transmitted values. Such a method may find particular application in vocoders.
IPC 1-7
IPC 8 full level
G10L 19/00 (2013.01); G10L 19/02 (2013.01); G10L 19/04 (2013.01); G10L 19/06 (2013.01); G10L 19/087 (2013.01); G10L 19/16 (2013.01); G10L 25/93 (2013.01); H03M 7/30 (2006.01); H03M 7/36 (2006.01)
CPC (source: EP KR US)
G10L 19/087 (2013.01 - EP US); G10L 19/16 (2013.01 - KR); G10L 25/93 (2013.01 - EP US); G10L 2019/0001 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6687667 B1 20040203; AT E222016 T1 20020815; AU 5870299 A 20000426; AU 768744 B2 20040108; CA 2345373 A1 20000413; DE 69902480 D1 20020912; DE 69902480 T2 20030522; EP 1125283 A1 20010822; EP 1125283 B1 20020807; FR 2784218 A1 20000407; FR 2784218 B1 20001208; IL 141911 A0 20020310; JP 2002527778 A 20020827; JP 4558205 B2 20101006; KR 20010075491 A 20010809; MX PA01003150 A 20020702; TW 463143 B 20011111; WO 0021077 A1 20000413
DOCDB simple family (application)
US 80699301 A 20010406; AT 99946281 T 19991001; AU 5870299 A 19991001; CA 2345373 A 19991001; DE 69902480 T 19991001; EP 99946281 A 19991001; FR 9812500 A 19981006; FR 9902348 W 19991001; IL 14191199 A 19991001; JP 2000575121 A 19991001; KR 20017004080 A 20010330; MX PA01003150 A 19991001; TW 89105887 A 20000330