FI116597B - Förfarande för vektorkvantisering speciellt av talsignaler - Google Patents

Förfarande för vektorkvantisering speciellt av talsignaler Download PDF

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Publication number
FI116597B
FI116597B FI955325A FI955325A FI116597B FI 116597 B FI116597 B FI 116597B FI 955325 A FI955325 A FI 955325A FI 955325 A FI955325 A FI 955325A FI 116597 B FI116597 B FI 116597B
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FI
Finland
Prior art keywords
codebook
vectors
vector
speech
excitation
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Application number
FI955325A
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English (en)
Finnish (fi)
Other versions
FI955325A (sv
FI955325A0 (sv
Inventor
Joerg-Martin Mueller
Bertram Waechter
Original Assignee
Bosch Gmbh Robert
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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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G10L19/038—Vector quantisation, e.g. TwinVQ audio
    • 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
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3082—Vector coding
    • 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
    • G10L2019/0007—Codebook element generation
    • 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
    • G10L2019/0011—Long term prediction filters, i.e. pitch estimation
    • 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

Claims (7)

1. Förfarande för vektorkvantisering av signalers sampelvärden, i synnerhet talsampelvärden, omfattande föl-5 jande steg: - i en första kodbok (CB1) inskrivs fasta vekto- rer, - i en andra kodbok (CB2) inskrivs vektorer som uppdateras efter varje en tidsperiod, 10. ur den andra kodboken (CB2) väljs ätminstone tvä vektorer, vilka i enlighet med ett pä förhand inställt första felkriterium ger de bästa prediktionsvärdena, - minst tvä ur den andra kodboken (CB2) valda vektorer kombineras var ooh en med vektorerna ur den första 15 kodboken (CB1), - bland vektorkombinationerna väljs en sadan vek-tor att representera ett optimerat sampelvärde, som pä basis av det första eller nägot annat felkriterium uppvisar det minsta avständet frän det ursprungliga sampelvärdet. 20
2. Förfarande enligt patentkrav 1, kännetecknat l av att i den första kodboken (CB1) är impulsvektorer in- 4. i « ,·, : skrivna för ett LPC-filter för talprediktion.
3. Förfarande enligt patentkrav l eller 2, kän-netecknat av att i den andra kodboken (CB2) är impuls- 25 vektorer inskrivna för ett tonhöjdssyntesfilter.
·” * 4. Förfarande enligt nägot av patentkrav 1 - 3, t » · *·* kännetecknat av att inskrivningarna i den första kod boken (CB1) förtunnas. j.j
· 5. Förfarande enligt nägot av patentkrav 1 - 4, J, : 30 kännetecknat av att för varje impulsvektor i den för- ; /, sta kodboken (CB1) fastställs ett sädant felmätt jämfört med det ursprungliga sampelvärdet som beaktar minst tvä ur • I den andra kodboken (CB2) valda predikt ionsvärden/ton- höj dsprediktorer. ‘F': 35
6. Förfarande enligt patentkrav 4 eller 5, kän netecknat av att för förtunning av den första kodboken 11 116597 (CB1) dämpas sädana vektorkomponenter, sora företrädesvis avlägsnas frän de tvä ramperioders summabitar, i vilka talsignalen är delad.
7. Förfarande enligt nägot av patentkrav 4 - 6, 5 kännetecknat av att förtunningen av inskrivningarna i den första kodboken (CB1) utförs i ett sädant mätt att det för behandlingen använda arbetet är lika stort som vid be-handlingen av endast en ur den andra kodboken (CB2) vald vektor. « » • 1 » · < t t * · I s » I t 1 «
FI955325A 1993-05-07 1995-11-06 Förfarande för vektorkvantisering speciellt av talsignaler FI116597B (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4315315A DE4315315A1 (de) 1993-05-07 1993-05-07 Verfahren zur Vektorquantisierung insbesondere von Sprachsignalen
DE4315315 1993-05-07
DE9400435 1994-04-20
PCT/DE1994/000435 WO1994027286A1 (de) 1993-05-07 1994-04-20 Verfahren zur vektorquantisierung, insbesondere von sprachsignalen

Publications (3)

Publication Number Publication Date
FI955325A FI955325A (sv) 1995-11-06
FI955325A0 FI955325A0 (sv) 1995-11-06
FI116597B true FI116597B (sv) 2005-12-30

Family

ID=6487539

Family Applications (1)

Application Number Title Priority Date Filing Date
FI955325A FI116597B (sv) 1993-05-07 1995-11-06 Förfarande för vektorkvantisering speciellt av talsignaler

Country Status (8)

Country Link
EP (1) EP0697125B1 (sv)
AU (1) AU681137B2 (sv)
DE (2) DE4315315A1 (sv)
DK (1) DK0697125T3 (sv)
ES (1) ES2136732T3 (sv)
FI (1) FI116597B (sv)
HU (1) HU216223B (sv)
WO (1) WO1994027286A1 (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538852A1 (de) * 1995-06-30 1997-01-02 Deutsche Telekom Ag Verfahren und Anordnung zur Klassifizierung von Sprachsignalen
US5781881A (en) * 1995-10-19 1998-07-14 Deutsche Telekom Ag Variable-subframe-length speech-coding classes derived from wavelet-transform parameters
US5867814A (en) * 1995-11-17 1999-02-02 National Semiconductor Corporation Speech coder that utilizes correlation maximization to achieve fast excitation coding, and associated coding method
GB2312360B (en) * 1996-04-12 2001-01-24 Olympus Optical Co Voice signal coding apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL94119A (en) * 1989-06-23 1996-06-18 Motorola Inc Digital voice recorder
JP3089769B2 (ja) * 1991-12-03 2000-09-18 日本電気株式会社 音声符号化装置

Also Published As

Publication number Publication date
FI955325A (sv) 1995-11-06
AU681137B2 (en) 1997-08-21
DE59408495D1 (de) 1999-08-19
EP0697125A1 (de) 1996-02-21
AU6502594A (en) 1994-12-12
DE4315315A1 (de) 1994-11-10
WO1994027286A1 (de) 1994-11-24
ES2136732T3 (es) 1999-12-01
HU216223B (hu) 1999-05-28
EP0697125B1 (de) 1999-07-14
HUT73545A (en) 1996-08-28
HU9503179D0 (en) 1995-12-28
DK0697125T3 (da) 2000-01-24
FI955325A0 (sv) 1995-11-06

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