WO2007102782A3 - Methods and arrangements for audio coding and decoding - Google Patents

Methods and arrangements for audio coding and decoding Download PDF

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Publication number
WO2007102782A3
WO2007102782A3 PCT/SE2007/050132 SE2007050132W WO2007102782A3 WO 2007102782 A3 WO2007102782 A3 WO 2007102782A3 SE 2007050132 W SE2007050132 W SE 2007050132W WO 2007102782 A3 WO2007102782 A3 WO 2007102782A3
Authority
WO
WIPO (PCT)
Prior art keywords
audio signal
signal sample
decoding
encoded
previous
Prior art date
Application number
PCT/SE2007/050132
Other languages
French (fr)
Other versions
WO2007102782A2 (en
Inventor
Anisse Taleb
Original Assignee
Ericsson Telefon Ab L M
Anisse Taleb
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 Ericsson Telefon Ab L M, Anisse Taleb filed Critical Ericsson Telefon Ab L M
Priority to CN2007800077800A priority Critical patent/CN101395661B/en
Priority to US12/281,953 priority patent/US8781842B2/en
Priority to EP07716105.7A priority patent/EP1991986B1/en
Publication of WO2007102782A2 publication Critical patent/WO2007102782A2/en
Publication of WO2007102782A3 publication Critical patent/WO2007102782A3/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
    • G10L19/04—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
    • 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
    • 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
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Abstract

A method for audio coding and decoding comprises primary encoding (12) of a present audio signal sample into an encoded representation (T(n)), and non-causal encoding (13) of a first previous audio signal sample into an encoded enhancement representation (ET(n-N+)). The method further comprises providing of the encoded representations to an end user. At the end user, the method comprises primary decoding (52) of the encoded representation (T*(n)) into a present received audio signal sample, and non- causal decoding (53) of the encoded enhancement representation (ET*(n-N+)) into an enhancement first previous received audio signal sample. The method further comprises improving of a first previous received audio signal sample, corresponding to the first previous audio signal sample, based on the enhancement first previous received audio signal sample. Devices and systems for audio coding and decoding are also presented.
PCT/SE2007/050132 2006-03-07 2007-03-07 Methods and arrangements for audio coding and decoding WO2007102782A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2007800077800A CN101395661B (en) 2006-03-07 2007-03-07 Methods and arrangements for audio coding and decoding
US12/281,953 US8781842B2 (en) 2006-03-07 2007-03-07 Scalable coding with non-casual predictive information in an enhancement layer
EP07716105.7A EP1991986B1 (en) 2006-03-07 2007-03-07 Methods and arrangements for audio coding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US74342106P 2006-03-07 2006-03-07
US60/743,421 2006-03-07

Publications (2)

Publication Number Publication Date
WO2007102782A2 WO2007102782A2 (en) 2007-09-13
WO2007102782A3 true WO2007102782A3 (en) 2007-11-08

Family

ID=38475280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/050132 WO2007102782A2 (en) 2006-03-07 2007-03-07 Methods and arrangements for audio coding and decoding

Country Status (4)

Country Link
US (1) US8781842B2 (en)
EP (1) EP1991986B1 (en)
CN (1) CN101395661B (en)
WO (1) WO2007102782A2 (en)

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US10225577B2 (en) * 2014-07-24 2019-03-05 Shidong Chen Methods and systems for noncausal predictive image and video coding
EP3079151A1 (en) * 2015-04-09 2016-10-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoder and method for encoding an audio signal
EP3483883A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio coding and decoding with selective postfiltering
EP3483880A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Temporal noise shaping
EP3483878A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio decoder supporting a set of different loss concealment tools
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EP3483886A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Selecting pitch lag
EP3483879A1 (en) * 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analysis/synthesis windowing function for modulated lapped transformation
EP3483882A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Controlling bandwidth in encoders and/or decoders
WO2019091576A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits
EP3483884A1 (en) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Signal filtering
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Also Published As

Publication number Publication date
US20090076830A1 (en) 2009-03-19
CN101395661A (en) 2009-03-25
EP1991986A2 (en) 2008-11-19
EP1991986B1 (en) 2019-07-31
EP1991986A4 (en) 2011-08-03
CN101395661B (en) 2013-02-06
WO2007102782A2 (en) 2007-09-13
US8781842B2 (en) 2014-07-15

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