ES2052043T3 - CODING PROCEDURE AND WORD CODE WITH LINEAR PREDICTION. - Google Patents

CODING PROCEDURE AND WORD CODE WITH LINEAR PREDICTION.

Info

Publication number
ES2052043T3
ES2052043T3 ES89401644T ES89401644T ES2052043T3 ES 2052043 T3 ES2052043 T3 ES 2052043T3 ES 89401644 T ES89401644 T ES 89401644T ES 89401644 T ES89401644 T ES 89401644T ES 2052043 T3 ES2052043 T3 ES 2052043T3
Authority
ES
Spain
Prior art keywords
filter
vectors
vector
voice signal
subtraction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES89401644T
Other languages
Spanish (es)
Inventor
Michel Lever
Marc Delprat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks France SAS
Original Assignee
Matra Communication SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matra Communication SA filed Critical Matra Communication SA
Application granted granted Critical
Publication of ES2052043T3 publication Critical patent/ES2052043T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
    • G10L19/113—Regular pulse excitation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0003—Backward prediction of gain
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0013—Codebook search algorithms
    • G10L2019/0014—Selection criteria for distances
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/06—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being correlation coefficients

Abstract

EL PROCEDIMIENTO, UTILIZABLE ESPECIALMENTE PARA LA TRANSMISION DE VOZ DE DEBIL CADENCIA, UTILIZA LA EXCITACION VECTORIAL. SE REPRESENTA UNA TRAMA DE SEÑAL DE UNA PARTE POR UNOS PARAMETROS DE PREDICCION, POR OTRA PARTE POR UNA SUCESION DE VECTORES DE EXCITACION CONTENIDOS EN UN DICCIONARIO (20) Y POR UNAS GANANCIAS (GK) DE AMPLIFICACION DE ESTOS VECTORES, ESTANDO DETERMINADOS LOS VECTORES RETENIDOS POR BUSQUEDA DEL MINIMO DE LA ENERGIA DE UNA SEÑAL DE ERROR OBTENIDA POR SUSTRACCION DE CADA VECTOR A SU VEZ, DESPUES DE HABERLO SOMETIDO A UN FILTRADO, A LA TRAMA DE LA SEÑAL DE VOZ. ANTES DE LA SUSTRACCION, SE SOMETE: CADA TRAMA DE LA SEÑAL DE VOZ A UN FILTRADO DE ANALISIS A CORTO PLAZO Y A UN FILTRADO SINTESIS PONDERADA, A COEFICIENTES EVENTUALMENTE FIJADOS EN EL TIEMPO Y EL VECTOR AMPLIFICADO A UN FILTRADO PREDICTIVO A LARGO PLAZO Y AL MISMO FILTRADO DE SINTESIS PONDERADA PERCEPTUAL QUE LA SEÑAL DE VOZ.THE PROCEDURE, ESPECIALLY USABLE FOR VOICE TRANSMISSION OF WEAK CADENCE, USES VECTOR EXCITATION. A SIGNAL SCREEN OF ONE PART IS REPRESENTED BY SOME PREDICTION PARAMETERS, BY THE OTHER PART BY A SUCCESSION OF EXCITATION VECTORS CONTAINED IN A DICTIONARY (20) AND BY SOME GAINS (GK) OF AMPLIFICATION OF THESE VECTORS, THE RETENTION VECTORS BEING DETERMINED BY SEARCHING THE MINIMUM OF THE ENERGY OF AN ERROR SIGNAL OBTAINED BY THE SUBTRACTION OF EACH VECTOR AT ITS TIME, AFTER HAVING SUBJECTED IT TO A FILTER, TO THE PLOT OF THE VOICE SIGNAL. BEFORE THE SUBTRACTION, SUBMIT: EACH FRAME OF THE VOICE SIGNAL TO A SHORT-TERM ANALYSIS FILTER AND A WEIGHTED SYNTHESIS FILTER, EVENTUALLY FIXED COEFFICIENTS IN TIME AND THE VECTOR AMPLIFIED TO A MULTIPLE PREDICTIVE FILTER PERCEPTUAL WEIGHTED SYNTHESIS FILTERING THAT THE VOICE SIGNAL.

ES89401644T 1988-06-13 1989-06-13 CODING PROCEDURE AND WORD CODE WITH LINEAR PREDICTION. Expired - Lifetime ES2052043T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8807846A FR2632758B1 (en) 1988-06-13 1988-06-13 LINEAR PREDICTION SPEECH CODING AND ENCODING METHOD

Publications (1)

Publication Number Publication Date
ES2052043T3 true ES2052043T3 (en) 1994-07-01

Family

ID=9367205

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89401644T Expired - Lifetime ES2052043T3 (en) 1988-06-13 1989-06-13 CODING PROCEDURE AND WORD CODE WITH LINEAR PREDICTION.

Country Status (4)

Country Link
EP (1) EP0347307B1 (en)
DE (1) DE68915057T2 (en)
ES (1) ES2052043T3 (en)
FR (1) FR2632758B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE186607T1 (en) * 1990-12-21 1999-11-15 British Telecomm VOICE CODING
ES2042410B1 (en) * 1992-04-15 1997-01-01 Control Sys S A ENCODING METHOD AND VOICE ENCODER FOR EQUIPMENT AND COMMUNICATION SYSTEMS.
FR2720849B1 (en) * 1994-06-03 1996-08-14 Matra Communication Method and device for preprocessing an acoustic signal upstream of a speech coder.
CN101615394B (en) * 2008-12-31 2011-02-16 华为技术有限公司 Method and device for allocating subframes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1337217C (en) * 1987-08-28 1995-10-03 Daniel Kenneth Freeman Speech coding

Also Published As

Publication number Publication date
DE68915057D1 (en) 1994-06-09
FR2632758B1 (en) 1991-06-07
FR2632758A1 (en) 1989-12-15
EP0347307B1 (en) 1994-05-04
DE68915057T2 (en) 1994-08-18
EP0347307A2 (en) 1989-12-20
EP0347307A3 (en) 1990-12-27

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