Title (en)

GENERALIZED ANALYSIS-BY-SYNTHESIS SPEECH CODING METHOD AND APPARATUS

Publication

EP 0539103 A3 19930811 (EN)

Application

EP 92309442 A 19921016

Priority

US 78268691 A 19911025

Abstract (en)

[origin: EP0539103A2] A generalized analysis-by-synthesis method and apparatus are disclosed. A plurality of trial original signals are generated based on an original signal for coding. The trial original signals are constrained to be perceptually similar to the original signal. Trial original signals are coded to produce one or more parameters representative thereof. Estimates of the trial original signals are synthesized from these parameters. Errors between the trial original signals and the synthesized estimates are determined. A coded representation of the original signal is determined which comprises parameters of the trial original signal having an associated error which satisfies an error evaluation process. Trial original signals may be generated by application of time-warps or time-shifts to the original signal. Coding of a trial original signal may be performed with conventional analysis-by-synthesis coding such as code-excited linear prediction coding (CELP). A minimum square error process may serve as the error criterion. <IMAGE>

IPC 1-7

G10L 9/14

IPC 8 full level

G10L 19/12 (2013.01); H03M 7/30 (2006.01)

CPC (source: EP)

G10L 19/12 (2013.01); G10L 25/06 (2013.01); G10L 2019/0011 (2013.01); G10L 2019/0012 (2013.01); G10L 2019/0013 (2013.01)

Citation (search report)

• [XP] INTERNATIONAL CONFERENCE ON ACOUSTICS SPEECH AND SIGNAL PROCESSING vol. 1, 23 March 1992, SAN FRANCISCO USA pages 337 - 340 KLEIJN ET AL 'Generalized analysis by synthesis coding and its application to pitch prediction'
• [A] IEEE TRANSACTIONS ON ACOUSTICS,SPEECH AND SIGNAL PROCESSING. vol. 36, no. 9, September 1988, NEW YORK US pages 1437 - 1444 SHIRAKI, HONDA 'LPC speech coding based on variable length segment quantization'
• [A] IEEE TRANSACTIONS ON COMMUNICATIONS vol. 38, no. 11, November 1990, NEW YORK US pages 1935 - 1937 LEE, UN 'On reducing computational complexity of codebook search in CELP coding'
• [A] INTERNATIONAL JOURNAL OF ELECTRONICS vol. 67, no. 2, August 1989, LONDON GB pages 173 - 178 PALIWAL 'Reduced complexity stochastically excited coder for the low bit rate coding of speech'

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family (publication)

EP 0539103 A2 19930428; EP 0539103 A3 19930811; EP 0539103 B1 19980429; DE 69225293 D1 19980604; DE 69225293 T2 19980910; ES 2115646 T3 19980701; JP 3662597 B2 20050622; JP H05232995 A 19930910

DOCDB simple family (application)

EP 92309442 A 19921016; DE 69225293 T 19921016; ES 92309442 T 19921016; JP 28480892 A 19921023