CA2154911A1 - Speech coding device - Google Patents

Speech coding device

Info

Publication number
CA2154911A1
CA2154911A1 CA2154911A CA2154911A CA2154911A1 CA 2154911 A1 CA2154911 A1 CA 2154911A1 CA 2154911 A CA2154911 A CA 2154911A CA 2154911 A CA2154911 A CA 2154911A CA 2154911 A1 CA2154911 A1 CA 2154911A1
Authority
CA
Canada
Prior art keywords
subframes
lag
frame
speech signal
calculated
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
CA2154911A
Other languages
French (fr)
Other versions
CA2154911C (en
Inventor
Kazunori Ozawa
Masahiro Serizawa
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.)
NEC Corp
Original Assignee
Kazunori Ozawa
Masahiro Serizawa
Nec Corporation
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
Priority claimed from JP19895094A external-priority patent/JP3153075B2/en
Priority claimed from JP6214838A external-priority patent/JP2907019B2/en
Priority claimed from JP7000300A external-priority patent/JP3003531B2/en
Application filed by Kazunori Ozawa, Masahiro Serizawa, Nec Corporation filed Critical Kazunori Ozawa
Publication of CA2154911A1 publication Critical patent/CA2154911A1/en
Application granted granted Critical
Publication of CA2154911C publication Critical patent/CA2154911C/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
    • 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
    • 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
    • G10L2019/0002—Codebook adaptations
    • 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
    • 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
    • G10L25/12—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 prediction coefficients

Abstract

A speech coding device capable of delivering a speech signal of excellent sound quality at a low bit rate is disclosed. The disclosed device is character-ized by a method of calculating lag corresponding to pitch period and a speech signal coding method. Lag is calculated as follows: A speech signal is divided into frames; one frame is divided into a plurality of subframes; for each frame, subframes in which lag of a speech signal is expressed in the form of a differen-tial relative to lag of a previous subframe and subframes in which lag is expressed in the form of an absolute value, i.e., the lag value itself, are estab-lished; a plurality of bit allocation patterns are established for each frame that allocate bits for expressing lag as an absolute value or a differential in each of the plurality of subframes; for each bit allocation pattern, pitch predictive distortion is calculated for every subframe; accumulated distortion is calculated by accumulating the pitch predictive distortion over a predetermined plurality of subframes in the frame; a bit allocation pattern is selected so as to minimize the accumulated distortion. The lags in the subframes of the selected pattern are determined as the lags in the subframes of interest.
CA002154911A 1994-08-02 1995-07-28 Speech coding device Expired - Fee Related CA2154911C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP19895094A JP3153075B2 (en) 1994-08-02 1994-08-02 Audio coding device
JP198950/1994 1994-08-02
JP6214838A JP2907019B2 (en) 1994-09-08 1994-09-08 Audio coding device
JP214838/1994 1994-09-08
JP7000300A JP3003531B2 (en) 1995-01-05 1995-01-05 Audio coding device
JP000300/1995 1995-01-05

Publications (2)

Publication Number Publication Date
CA2154911A1 true CA2154911A1 (en) 1996-02-03
CA2154911C CA2154911C (en) 2001-01-02

Family

ID=27274401

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002154911A Expired - Fee Related CA2154911C (en) 1994-08-02 1995-07-28 Speech coding device

Country Status (4)

Country Link
US (1) US5778334A (en)
EP (3) EP1093115A3 (en)
CA (1) CA2154911C (en)
DE (1) DE69530442T2 (en)

Cited By (1)

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CN113113001A (en) * 2021-04-20 2021-07-13 深圳市友杰智新科技有限公司 Human voice activation detection method and device, computer equipment and storage medium

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JP3902860B2 (en) * 1998-03-09 2007-04-11 キヤノン株式会社 Speech synthesis control device, control method therefor, and computer-readable memory
US6175654B1 (en) * 1998-03-26 2001-01-16 Intel Corporation Method and apparatus for encoding data in an interframe video encoder
US6470309B1 (en) * 1998-05-08 2002-10-22 Texas Instruments Incorporated Subframe-based correlation
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EP1099215B1 (en) * 1999-05-26 2005-02-23 Koninklijke Philips Electronics N.V. Audio signal transmission system
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US6574593B1 (en) 1999-09-22 2003-06-03 Conexant Systems, Inc. Codebook tables for encoding and decoding
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US20040167772A1 (en) * 2003-02-26 2004-08-26 Engin Erzin Speech coding and decoding in a voice communication system
US9058812B2 (en) * 2005-07-27 2015-06-16 Google Technology Holdings LLC Method and system for coding an information signal using pitch delay contour adjustment
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WO2008072736A1 (en) * 2006-12-15 2008-06-19 Panasonic Corporation Adaptive sound source vector quantization unit and adaptive sound source vector quantization method
EP2101319B1 (en) * 2006-12-15 2015-09-16 Panasonic Intellectual Property Corporation of America Adaptive sound source vector quantization device and method thereof
MX2009009229A (en) * 2007-03-02 2009-09-08 Panasonic Corp Encoding device and encoding method.
US8027798B2 (en) * 2007-11-08 2011-09-27 International Business Machines Corporation Digital thermal sensor test implementation without using main core voltage supply
CA2729751C (en) * 2008-07-10 2017-10-24 Voiceage Corporation Device and method for quantizing and inverse quantizing lpc filters in a super-frame
GB2466674B (en) 2009-01-06 2013-11-13 Skype Speech coding
GB2466675B (en) 2009-01-06 2013-03-06 Skype Speech coding
GB2466670B (en) 2009-01-06 2012-11-14 Skype Speech encoding
GB2466671B (en) 2009-01-06 2013-03-27 Skype Speech encoding
GB2466669B (en) 2009-01-06 2013-03-06 Skype Speech coding
GB2466673B (en) 2009-01-06 2012-11-07 Skype Quantization
GB2466672B (en) 2009-01-06 2013-03-13 Skype Speech coding
CN102804263A (en) * 2009-06-23 2012-11-28 日本电信电话株式会社 Coding method, decoding method, and device and program using the methods
US8452606B2 (en) 2009-09-29 2013-05-28 Skype Speech encoding using multiple bit rates
KR101747917B1 (en) 2010-10-18 2017-06-15 삼성전자주식회사 Apparatus and method for determining weighting function having low complexity for lpc coefficients quantization
WO2013096875A2 (en) * 2011-12-21 2013-06-27 Huawei Technologies Co., Ltd. Adaptively encoding pitch lag for voiced speech
CN103426441B (en) * 2012-05-18 2016-03-02 华为技术有限公司 Detect the method and apparatus of the correctness of pitch period
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113113001A (en) * 2021-04-20 2021-07-13 深圳市友杰智新科技有限公司 Human voice activation detection method and device, computer equipment and storage medium

Also Published As

Publication number Publication date
EP1093115A2 (en) 2001-04-18
EP1093115A3 (en) 2001-05-02
EP0696026B1 (en) 2003-04-23
DE69530442D1 (en) 2003-05-28
US5778334A (en) 1998-07-07
CA2154911C (en) 2001-01-02
EP0696026A3 (en) 1998-01-21
DE69530442T2 (en) 2003-10-23
EP0696026A2 (en) 1996-02-07
EP1093116A1 (en) 2001-04-18

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