WO2008022181A3 - Updating of decoder states after packet loss concealment - Google Patents

Updating of decoder states after packet loss concealment Download PDF

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Publication number
WO2008022181A3
WO2008022181A3 PCT/US2007/075982 US2007075982W WO2008022181A3 WO 2008022181 A3 WO2008022181 A3 WO 2008022181A3 US 2007075982 W US2007075982 W US 2007075982W WO 2008022181 A3 WO2008022181 A3 WO 2008022181A3
Authority
WO
WIPO (PCT)
Prior art keywords
encoder
updating
state
audio signal
packet loss
Prior art date
Application number
PCT/US2007/075982
Other languages
French (fr)
Other versions
WO2008022181A2 (en
Inventor
Jes Thyssen
Robert W Zopf
Juin-Hwey Chen
Original Assignee
Broadcom Corp
Jes Thyssen
Robert W Zopf
Juin-Hwey Chen
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 Broadcom Corp, Jes Thyssen, Robert W Zopf, Juin-Hwey Chen filed Critical Broadcom Corp
Priority to EP07840958A priority Critical patent/EP2054877B1/en
Priority to CN2007800014996A priority patent/CN101361112B/en
Publication of WO2008022181A2 publication Critical patent/WO2008022181A2/en
Publication of WO2008022181A3 publication Critical patent/WO2008022181A3/en
Priority to HK09106626.0A priority patent/HK1129154A1/en

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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
    • G10L19/0204—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 using subband decomposition
    • 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
    • G10L19/02—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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • G10L21/043—Time compression or expansion by changing speed
    • G10L21/045—Time compression or expansion by changing speed using thinning out or insertion of a waveform
    • 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
    • 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

Abstract

A technique is described herein for updating a state of a decoder in a predictive coding system after synthesizing an audio output signal corresponding to a lost frame in a series of frames representing an encoded audio signal. In accordance with the technique, an audio signal associated with the synthesized output audio signal is re-encoded in an encoder to generate an encoder state, wherein the encoder is simplified with respect to an encoder used to generate the encoded audio signal. The state of the decoder is then updated based on the generated encoder state.
PCT/US2007/075982 2006-08-15 2007-08-15 Updating of decoder states after packet loss concealment WO2008022181A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07840958A EP2054877B1 (en) 2006-08-15 2007-08-15 Updating of decoder states after packet loss concealment
CN2007800014996A CN101361112B (en) 2006-08-15 2007-08-15 Re-phasing of decoder states after packet loss
HK09106626.0A HK1129154A1 (en) 2006-08-15 2009-07-21 The hiding of the updating of decoder state after packet missing

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US83762706P 2006-08-15 2006-08-15
US60/837,627 2006-08-15
US84805106P 2006-09-29 2006-09-29
US84804906P 2006-09-29 2006-09-29
US60/848,049 2006-09-29
US60/848,051 2006-09-29
US85346106P 2006-10-23 2006-10-23
US60/853,461 2006-10-23

Publications (2)

Publication Number Publication Date
WO2008022181A2 WO2008022181A2 (en) 2008-02-21
WO2008022181A3 true WO2008022181A3 (en) 2008-05-08

Family

ID=39062148

Family Applications (5)

Application Number Title Priority Date Filing Date
PCT/US2007/075987 WO2008022184A2 (en) 2006-08-15 2007-08-15 Constrained and controlled decoding after packet loss
PCT/US2007/075975 WO2008022176A2 (en) 2006-08-15 2007-08-15 Packet loss concealment for sub-band predictive coding based on extrapolation of full-band audio waveform
PCT/US2007/076009 WO2008022200A2 (en) 2006-08-15 2007-08-15 Re-phasing of decoder states after packet loss
PCT/US2007/075982 WO2008022181A2 (en) 2006-08-15 2007-08-15 Updating of decoder states after packet loss concealment
PCT/US2007/076019 WO2008022207A2 (en) 2006-08-15 2007-08-15 Time-warping of decoded audio signal after packet loss

Family Applications Before (3)

Application Number Title Priority Date Filing Date
PCT/US2007/075987 WO2008022184A2 (en) 2006-08-15 2007-08-15 Constrained and controlled decoding after packet loss
PCT/US2007/075975 WO2008022176A2 (en) 2006-08-15 2007-08-15 Packet loss concealment for sub-band predictive coding based on extrapolation of full-band audio waveform
PCT/US2007/076009 WO2008022200A2 (en) 2006-08-15 2007-08-15 Re-phasing of decoder states after packet loss

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2007/076019 WO2008022207A2 (en) 2006-08-15 2007-08-15 Time-warping of decoded audio signal after packet loss

Country Status (6)

Country Link
US (10) US20080046233A1 (en)
EP (5) EP2054879B1 (en)
KR (5) KR101041895B1 (en)
DE (2) DE602007004502D1 (en)
HK (5) HK1129154A1 (en)
WO (5) WO2008022184A2 (en)

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