CA2156000A1 - Frame Erasure or Packet Loss Compensation Method - Google Patents

Frame Erasure or Packet Loss Compensation Method

Info

Publication number
CA2156000A1
CA2156000A1 CA2156000A CA2156000A CA2156000A1 CA 2156000 A1 CA2156000 A1 CA 2156000A1 CA 2156000 A CA2156000 A CA 2156000A CA 2156000 A CA2156000 A CA 2156000A CA 2156000 A1 CA2156000 A1 CA 2156000A1
Authority
CA
Canada
Prior art keywords
signal
decoding
excitation
corrupted
case
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
CA2156000A
Other languages
French (fr)
Other versions
CA2156000C (en
Inventor
Juin-Hwey Chen
Craig Robert Watkins
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Publication of CA2156000A1 publication Critical patent/CA2156000A1/en
Application granted granted Critical
Publication of CA2156000C publication Critical patent/CA2156000C/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
    • G10L19/12—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

Abstract

A method and apparatus for improving the performance of coding systems in the presence of frame erasures or lost packets. The encoded signal ismodified after transmission but prior to decoding by a decoder preprocessor. Thepreprocessor recognizes that a given frame has been corrupted and modifies the encoded signal so that the decoding thereof will result in improved coding system performance. Specifically, based on the decoding process and on a predetermined target signal, the encoded signal is modified so that the decoding thereof will generate an approximation to the target signal. In a first illustrative embodiment, a CELP speech coder is used and the target signal is an excitation signal comprised of all-zero excitation vectors. In this case, the portion of the corrupted excitation signal indices which identify the corresponding gain factors are set to values which represent a low gain factor. In a second illustrative embodiment, a CELP speech coder is used and the target signal comprises an extrapolation of the excitation signal represented by the encoded signal for one or more previous frames. In this case, the preprocessor encodes the extrapolated excitation signal using the best codebook matches available. In either case, the effect of corrupted frames in the reconstructed speech signal is minimized.
CA002156000A 1994-10-14 1995-08-14 Frame erasure or packet loss compensation method Expired - Lifetime CA2156000C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/324,283 US5550543A (en) 1994-10-14 1994-10-14 Frame erasure or packet loss compensation method
US324,283 1994-10-14

Publications (2)

Publication Number Publication Date
CA2156000A1 true CA2156000A1 (en) 1996-04-15
CA2156000C CA2156000C (en) 1999-11-02

Family

ID=23262912

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002156000A Expired - Lifetime CA2156000C (en) 1994-10-14 1995-08-14 Frame erasure or packet loss compensation method

Country Status (9)

Country Link
US (1) US5550543A (en)
EP (1) EP0707308B1 (en)
JP (1) JP3241978B2 (en)
KR (1) KR960016291A (en)
AU (1) AU3313395A (en)
CA (1) CA2156000C (en)
DE (1) DE69521004T2 (en)
ES (1) ES2157302T3 (en)
MX (1) MX9504290A (en)

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US6205130B1 (en) * 1996-09-25 2001-03-20 Qualcomm Incorporated Method and apparatus for detecting bad data packets received by a mobile telephone using decoded speech parameters
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US5968182A (en) * 1997-05-12 1999-10-19 International Business Machines Corporation Method and means for utilizing device long busy response for resolving detected anomalies at the lowest level in a hierarchical, demand/response storage management subsystem
JP3206497B2 (en) * 1997-06-16 2001-09-10 日本電気株式会社 Signal Generation Adaptive Codebook Using Index
US6148422A (en) * 1997-10-07 2000-11-14 Nortel Networks Limited Telecommunication network utilizing an error control protocol
JP3252782B2 (en) * 1998-01-13 2002-02-04 日本電気株式会社 Voice encoding / decoding device for modem signal
TW401699B (en) * 1998-04-01 2000-08-11 Koninkl Philips Electronics Nv A method and device for generating display frames from a sequence of source frames through synthesizing one or more intermediate frames exclusively from an immediately preceding source frame
US6775652B1 (en) 1998-06-30 2004-08-10 At&T Corp. Speech recognition over lossy transmission systems
US6804244B1 (en) 1999-08-10 2004-10-12 Texas Instruments Incorporated Integrated circuits for packet communications
US6744757B1 (en) 1999-08-10 2004-06-01 Texas Instruments Incorporated Private branch exchange systems for packet communications
US6678267B1 (en) 1999-08-10 2004-01-13 Texas Instruments Incorporated Wireless telephone with excitation reconstruction of lost packet
US6801499B1 (en) * 1999-08-10 2004-10-05 Texas Instruments Incorporated Diversity schemes for packet communications
US6757256B1 (en) 1999-08-10 2004-06-29 Texas Instruments Incorporated Process of sending packets of real-time information
US6801532B1 (en) * 1999-08-10 2004-10-05 Texas Instruments Incorporated Packet reconstruction processes for packet communications
US7574351B2 (en) * 1999-12-14 2009-08-11 Texas Instruments Incorporated Arranging CELP information of one frame in a second packet
US6570509B2 (en) * 2000-03-03 2003-05-27 Motorola, Inc. Method and system for encoding to mitigate decoding errors in a receiver
US6584438B1 (en) * 2000-04-24 2003-06-24 Qualcomm Incorporated Frame erasure compensation method in a variable rate speech coder
JP2002162998A (en) * 2000-11-28 2002-06-07 Fujitsu Ltd Voice encoding method accompanied by packet repair processing
EP1217613A1 (en) * 2000-12-19 2002-06-26 Koninklijke Philips Electronics N.V. Reconstitution of missing or bad frames in cellular telephony
DE10124421C1 (en) * 2001-05-18 2002-10-17 Siemens Ag Codec parameter estimation method uses iteration process employing earlier and later codec parameter values
US7143032B2 (en) 2001-08-17 2006-11-28 Broadcom Corporation Method and system for an overlap-add technique for predictive decoding based on extrapolation of speech and ringinig waveform
US7711563B2 (en) 2001-08-17 2010-05-04 Broadcom Corporation Method and system for frame erasure concealment for predictive speech coding based on extrapolation of speech waveform
KR100413039B1 (en) * 2002-01-16 2003-12-31 어뮤즈텍(주) Pitch correction method and apparatus
US20040064308A1 (en) * 2002-09-30 2004-04-01 Intel Corporation Method and apparatus for speech packet loss recovery
KR100462024B1 (en) * 2002-12-09 2004-12-17 한국전자통신연구원 Method for restoring packet loss by using additional speech data and transmitter and receiver using the method
US20040122680A1 (en) * 2002-12-18 2004-06-24 Mcgowan James William Method and apparatus for providing coder independent packet replacement
US7411985B2 (en) * 2003-03-21 2008-08-12 Lucent Technologies Inc. Low-complexity packet loss concealment method for voice-over-IP speech transmission
US7379864B2 (en) * 2003-05-06 2008-05-27 Lucent Technologies Inc. Method and apparatus for the detection of previous packet loss in non-packetized speech
JP2006033356A (en) * 2004-07-15 2006-02-02 Renesas Technology Corp Audio data processing apparatus
US7519535B2 (en) * 2005-01-31 2009-04-14 Qualcomm Incorporated Frame erasure concealment in voice communications
US7930176B2 (en) 2005-05-20 2011-04-19 Broadcom Corporation Packet loss concealment for block-independent speech codecs
KR101013642B1 (en) 2005-12-21 2011-02-10 닛본 덴끼 가부시끼가이샤 Code conversion device, code conversion method used for the same and program thereof
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US8015000B2 (en) * 2006-08-03 2011-09-06 Broadcom Corporation Classification-based frame loss concealment for audio signals
US8280728B2 (en) * 2006-08-11 2012-10-02 Broadcom Corporation Packet loss concealment for a sub-band predictive coder based on extrapolation of excitation waveform

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US5233660A (en) * 1991-09-10 1993-08-03 At&T Bell Laboratories Method and apparatus for low-delay celp speech coding and decoding
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US5615298A (en) 1994-03-14 1997-03-25 Lucent Technologies Inc. Excitation signal synthesis during frame erasure or packet loss
US5450449A (en) * 1994-03-14 1995-09-12 At&T Ipm Corp. Linear prediction coefficient generation during frame erasure or packet loss

Also Published As

Publication number Publication date
AU3313395A (en) 1996-04-26
DE69521004D1 (en) 2001-06-28
JP3241978B2 (en) 2001-12-25
US5550543A (en) 1996-08-27
DE69521004T2 (en) 2001-11-29
EP0707308B1 (en) 2001-05-23
EP0707308A1 (en) 1996-04-17
CA2156000C (en) 1999-11-02
KR960016291A (en) 1996-05-22
JPH08227300A (en) 1996-09-03
ES2157302T3 (en) 2001-08-16
MX9504290A (en) 1997-01-31

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