CA2016461A1 - Method for improving the speech quality in multi-pulse excited linear predictive coding - Google Patents

Method for improving the speech quality in multi-pulse excited linear predictive coding

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Publication number
CA2016461A1
CA2016461A1 CA2016461A CA2016461A CA2016461A1 CA 2016461 A1 CA2016461 A1 CA 2016461A1 CA 2016461 A CA2016461 A CA 2016461A CA 2016461 A CA2016461 A CA 2016461A CA 2016461 A1 CA2016461 A1 CA 2016461A1
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CA
Canada
Prior art keywords
pulse
pitch
mufti
improving
linear predictive
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.)
Granted
Application number
CA2016461A
Other languages
French (fr)
Other versions
CA2016461C (en
Inventor
Richard Louis Zinser
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.)
General Electric Co
Original Assignee
General Electric Co
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.)
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Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of CA2016461A1 publication Critical patent/CA2016461A1/en
Application granted granted Critical
Publication of CA2016461C publication Critical patent/CA2016461C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G10L19/04—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
    • 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
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor

Abstract

A technique that reconciles the differences between the estimator and the filter of a mufti-pulse linear predictive voice encoder achieves a higher quality in the output speech.
The technique simultaneously solves for the pulse amplitudes and pitch tap gain to minimize the estimator bias in the mufti-pulse excitation and thereby improves performance of the system. The increased SNR is accomplished by first modifying the pitch predictor such that the pitch synthesis filter accurately reflects the estimation procedure used to find the pitch tap gain and, second, improving the excitation analysis technique such that the pitch predictor tap gain and pulse amplitudes are solved for simultaneously, rather than sequentially. Neither of these modifications results in an increased transmission rate and they do not significantly increase the complexity of the mufti-pulse coding algorithm.
CA002016461A 1989-05-18 1990-05-10 Method for improving the speech quality in multi-pulse excited linear predictive coding Expired - Fee Related CA2016461C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/353,856 US5105464A (en) 1989-05-18 1989-05-18 Means for improving the speech quality in multi-pulse excited linear predictive coding
US353,856 1989-05-18

Publications (2)

Publication Number Publication Date
CA2016461A1 true CA2016461A1 (en) 1990-11-18
CA2016461C CA2016461C (en) 2000-11-07

Family

ID=23390876

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002016461A Expired - Fee Related CA2016461C (en) 1989-05-18 1990-05-10 Method for improving the speech quality in multi-pulse excited linear predictive coding

Country Status (2)

Country Link
US (1) US5105464A (en)
CA (1) CA2016461C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457783A (en) * 1992-08-07 1995-10-10 Pacific Communication Sciences, Inc. Adaptive speech coder having code excited linear prediction
KR100296409B1 (en) * 1993-02-27 2001-10-24 윤종용 Multi-pulse excitation voice coding method
TW317051B (en) * 1996-02-15 1997-10-01 Philips Electronics Nv
US5708757A (en) * 1996-04-22 1998-01-13 France Telecom Method of determining parameters of a pitch synthesis filter in a speech coder, and speech coder implementing such method
US6003000A (en) * 1997-04-29 1999-12-14 Meta-C Corporation Method and system for speech processing with greatly reduced harmonic and intermodulation distortion
US6188981B1 (en) * 1998-09-18 2001-02-13 Conexant Systems, Inc. Method and apparatus for detecting voice activity in a speech signal
US7457746B2 (en) * 2006-03-20 2008-11-25 Mindspeed Technologies, Inc. Pitch prediction for packet loss concealment
US9082416B2 (en) * 2010-09-16 2015-07-14 Qualcomm Incorporated Estimating a pitch lag

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184049A (en) * 1978-08-25 1980-01-15 Bell Telephone Laboratories, Incorporated Transform speech signal coding with pitch controlled adaptive quantizing
IT1144551B (en) * 1981-02-24 1986-10-29 Cselt Centro Studi Lab Telecom NUMERICAL DEVICE FOR DISCRIMINATION OF VOICE SIGNALS AND NUMBERED DATA SIGNALS
CA1219079A (en) * 1983-06-27 1987-03-10 Tetsu Taguchi Multi-pulse type vocoder
CA1255802A (en) * 1984-07-05 1989-06-13 Kazunori Ozawa Low bit-rate pattern encoding and decoding with a reduced number of excitation pulses
IT1179803B (en) * 1984-10-30 1987-09-16 Cselt Centro Studi Lab Telecom METHOD AND DEVICE FOR THE CORRECTION OF ERRORS CAUSED BY IMPULSIVE NOISE ON VOICE SIGNALS CODED WITH LOW SPEED BETWEEN CI AND TRANSMITTED ON RADIO COMMUNICATION CHANNELS
US4890328A (en) * 1985-08-28 1989-12-26 American Telephone And Telegraph Company Voice synthesis utilizing multi-level filter excitation
US4776014A (en) * 1986-09-02 1988-10-04 General Electric Company Method for pitch-aligned high-frequency regeneration in RELP vocoders
US4873723A (en) * 1986-09-18 1989-10-10 Nec Corporation Method and apparatus for multi-pulse speech coding
DE3783905T2 (en) * 1987-03-05 1993-08-19 Ibm BASIC FREQUENCY DETERMINATION METHOD AND VOICE ENCODER USING THIS METHOD.
JPH087597B2 (en) * 1988-03-28 1996-01-29 日本電気株式会社 Speech coder

Also Published As

Publication number Publication date
US5105464A (en) 1992-04-14
CA2016461C (en) 2000-11-07

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