WO1999018565A3 - Speech coding - Google Patents

Speech coding Download PDF

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Publication number
WO1999018565A3
WO1999018565A3 PCT/FI1998/000715 FI9800715W WO9918565A3 WO 1999018565 A3 WO1999018565 A3 WO 1999018565A3 FI 9800715 W FI9800715 W FI 9800715W WO 9918565 A3 WO9918565 A3 WO 9918565A3
Authority
WO
WIPO (PCT)
Prior art keywords
coefficients
current frame
lpc coefficients
lpc
generated
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.)
Ceased
Application number
PCT/FI1998/000715
Other languages
French (fr)
Other versions
WO1999018565A2 (en
Inventor
Pasi Ojala
Ari Lakaniemi
Vesa T Ruoppila
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.)
Nokia Oyj
Original Assignee
Nokia Mobile Phones Ltd
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 Nokia Mobile Phones Ltd filed Critical Nokia Mobile Phones Ltd
Priority to DE69804121T priority Critical patent/DE69804121T2/en
Priority to EP98943923A priority patent/EP1019907B1/en
Priority to AU91649/98A priority patent/AU9164998A/en
Priority to JP2000515270A priority patent/JP2001519551A/en
Publication of WO1999018565A2 publication Critical patent/WO1999018565A2/en
Publication of WO1999018565A3 publication Critical patent/WO1999018565A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/002—Dynamic bit allocation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • G10L19/07—Line spectrum pair [LSP] vocoders

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A method of coding a sampled speech signal in which the speech signal is divided into sequential frames. For each current frame, a first set of linear prediction coding (LPC) coefficients are generated, where the number of LPC coefficients depends upon the characteristics of the current frame. If the number of LPC coefficients in the first set of the current frame differs from the number in the first set of the preceding frame, then a second expanded or contracted set of LPC coefficients is generated from the first set of LPC coefficients for the preceding frame. This second set contains the same number of LPC coefficients as are present in said first set of the current frame. Respective sets of line spectra frequency (LSP) coefficients are generated for the first set of LPC coefficients of the current frame and the second set of LPC coefficients of the preceding frame. The sets of LSP coefficients are then combined to provide an encoded residual signal.
PCT/FI1998/000715 1997-10-02 1998-09-14 Speech coding Ceased WO1999018565A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69804121T DE69804121T2 (en) 1997-10-02 1998-09-14 VOICE CODING
EP98943923A EP1019907B1 (en) 1997-10-02 1998-09-14 Speech coding
AU91649/98A AU9164998A (en) 1997-10-02 1998-09-14 Speech coding
JP2000515270A JP2001519551A (en) 1997-10-02 1998-09-14 Voice coding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI973873 1997-10-02
FI973873A FI973873A7 (en) 1997-10-02 1997-10-02 Speech coding

Publications (2)

Publication Number Publication Date
WO1999018565A2 WO1999018565A2 (en) 1999-04-15
WO1999018565A3 true WO1999018565A3 (en) 1999-06-17

Family

ID=8549657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000715 Ceased WO1999018565A2 (en) 1997-10-02 1998-09-14 Speech coding

Country Status (7)

Country Link
US (1) US6202045B1 (en)
EP (1) EP1019907B1 (en)
JP (1) JP2001519551A (en)
AU (1) AU9164998A (en)
DE (1) DE69804121T2 (en)
FI (1) FI973873A7 (en)
WO (1) WO1999018565A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7289951B1 (en) 1999-07-05 2007-10-30 Nokia Corporation Method for improving the coding efficiency of an audio signal
US8849658B2 (en) 2009-01-06 2014-09-30 Skype Speech encoding utilizing independent manipulation of signal and noise spectrum
US9263051B2 (en) 2009-01-06 2016-02-16 Skype Speech coding by quantizing with random-noise signal
US9530423B2 (en) 2009-01-06 2016-12-27 Skype Speech encoding by determining a quantization gain based on inverse of a pitch correlation

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CA2722110C (en) * 1999-08-23 2014-04-08 Panasonic Corporation Apparatus and method for speech coding
US7315815B1 (en) * 1999-09-22 2008-01-01 Microsoft Corporation LPC-harmonic vocoder with superframe structure
US7110947B2 (en) * 1999-12-10 2006-09-19 At&T Corp. Frame erasure concealment technique for a bitstream-based feature extractor
US6606591B1 (en) * 2000-04-13 2003-08-12 Conexant Systems, Inc. Speech coding employing hybrid linear prediction coding
CN1216366C (en) * 2000-11-03 2005-08-24 皇家菲利浦电子有限公司 Audio Signal Coding Based on Sine Model
KR101001170B1 (en) * 2002-07-16 2010-12-15 코닌클리케 필립스 일렉트로닉스 엔.브이. Audio coding
US8090577B2 (en) * 2002-08-08 2012-01-03 Qualcomm Incorported Bandwidth-adaptive quantization
CA2415105A1 (en) * 2002-12-24 2004-06-24 Voiceage Corporation A method and device for robust predictive vector quantization of linear prediction parameters in variable bit rate speech coding
US7668712B2 (en) * 2004-03-31 2010-02-23 Microsoft Corporation Audio encoding and decoding with intra frames and adaptive forward error correction
US7386445B2 (en) * 2005-01-18 2008-06-10 Nokia Corporation Compensation of transient effects in transform coding
US7707034B2 (en) * 2005-05-31 2010-04-27 Microsoft Corporation Audio codec post-filter
US7831421B2 (en) * 2005-05-31 2010-11-09 Microsoft Corporation Robust decoder
US7177804B2 (en) 2005-05-31 2007-02-13 Microsoft Corporation Sub-band voice codec with multi-stage codebooks and redundant coding
US7831420B2 (en) * 2006-04-04 2010-11-09 Qualcomm Incorporated Voice modifier for speech processing systems
CN101770777B (en) * 2008-12-31 2012-04-25 华为技术有限公司 A linear predictive coding frequency band extension method, device and codec system
GB2466670B (en) * 2009-01-06 2012-11-14 Skype Speech encoding
GB2466674B (en) 2009-01-06 2013-11-13 Skype Speech coding
US9058818B2 (en) * 2009-10-22 2015-06-16 Broadcom Corporation User attribute derivation and update for network/peer assisted speech coding
WO2011059254A2 (en) * 2009-11-12 2011-05-19 Lg Electronics Inc. An apparatus for processing a signal and method thereof
EP2551848A4 (en) * 2010-03-23 2016-07-27 Lg Electronics Inc Method and apparatus for processing an audio signal
US9866839B2 (en) * 2012-01-20 2018-01-09 Electronics And Telecommunications Research Institute Method for encoding and decoding quantized matrix and apparatus using same
US11621011B2 (en) 2018-10-29 2023-04-04 Dolby International Ab Methods and apparatus for rate quality scalable coding with generative models

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WO1997005602A1 (en) * 1995-08-01 1997-02-13 Qualcomm Incorporated Method and apparatus for generating and encoding line spectral square roots
US5630011A (en) * 1990-12-05 1997-05-13 Digital Voice Systems, Inc. Quantization of harmonic amplitudes representing speech

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US4969192A (en) 1987-04-06 1990-11-06 Voicecraft, Inc. Vector adaptive predictive coder for speech and audio
US4890327A (en) * 1987-06-03 1989-12-26 Itt Corporation Multi-rate digital voice coder apparatus
US5243686A (en) * 1988-12-09 1993-09-07 Oki Electric Industry Co., Ltd. Multi-stage linear predictive analysis method for feature extraction from acoustic signals
CA2010830C (en) 1990-02-23 1996-06-25 Jean-Pierre Adoul Dynamic codebook for efficient speech coding based on algebraic codes
FI95085C (en) 1992-05-11 1995-12-11 Nokia Mobile Phones Ltd A method for digitally encoding a speech signal and a speech encoder for performing the method
FI91345C (en) 1992-06-24 1994-06-10 Nokia Mobile Phones Ltd A method for enhancing handover
FI96248C (en) 1993-05-06 1996-05-27 Nokia Mobile Phones Ltd Method for providing a synthetic filter for long-term interval and synthesis filter for speech coder
FI98163C (en) 1994-02-08 1997-04-25 Nokia Mobile Phones Ltd Coding system for parametric speech coding
JP3235703B2 (en) * 1995-03-10 2001-12-04 日本電信電話株式会社 Method for determining filter coefficient of digital filter
US5890110A (en) * 1995-03-27 1999-03-30 The Regents Of The University Of California Variable dimension vector quantization
FR2742568B1 (en) * 1995-12-15 1998-02-13 Catherine Quinquis METHOD OF LINEAR PREDICTION ANALYSIS OF AN AUDIO FREQUENCY SIGNAL, AND METHODS OF ENCODING AND DECODING AN AUDIO FREQUENCY SIGNAL INCLUDING APPLICATION
FI964975A7 (en) * 1996-12-12 1998-06-13 Nokia Mobile Phones Ltd Method and device for encoding speech

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US5630011A (en) * 1990-12-05 1997-05-13 Digital Voice Systems, Inc. Quantization of harmonic amplitudes representing speech
WO1997005602A1 (en) * 1995-08-01 1997-02-13 Qualcomm Incorporated Method and apparatus for generating and encoding line spectral square roots

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DIGITAL SPEECH PROCESSING, SYNTHESIS AND RECOGNITION, SADAOKI FURUI, MARCEL DEKKER, INC., NEW YORK and BASEL, pages 90-91. *
IEEE-IECEJ-ASJ INTERNATIONAL CONFERENCE ON ACOUSTICS...., Volume 2, 1986, (New York), FREDERICK L. KITSON et al., "A Real-Time ADPCM Encoder Using Variable Order Prediction", pages 825-828. *
PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ..., Volume I, May 1998, (Seattle, USA), PASI OJALA et al., "Variable Model Order LPC Quantization". *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7289951B1 (en) 1999-07-05 2007-10-30 Nokia Corporation Method for improving the coding efficiency of an audio signal
US8849658B2 (en) 2009-01-06 2014-09-30 Skype Speech encoding utilizing independent manipulation of signal and noise spectrum
US9263051B2 (en) 2009-01-06 2016-02-16 Skype Speech coding by quantizing with random-noise signal
US9530423B2 (en) 2009-01-06 2016-12-27 Skype Speech encoding by determining a quantization gain based on inverse of a pitch correlation

Also Published As

Publication number Publication date
EP1019907A2 (en) 2000-07-19
EP1019907B1 (en) 2002-03-06
JP2001519551A (en) 2001-10-23
AU9164998A (en) 1999-04-27
FI973873A7 (en) 1999-04-03
DE69804121T2 (en) 2002-10-31
DE69804121D1 (en) 2002-04-11
FI973873A0 (en) 1997-10-02
US6202045B1 (en) 2001-03-13
WO1999018565A2 (en) 1999-04-15

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