CA2482866A1 - Device and method for concealing an error - Google Patents

Device and method for concealing an error Download PDF

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Publication number
CA2482866A1
CA2482866A1 CA002482866A CA2482866A CA2482866A1 CA 2482866 A1 CA2482866 A1 CA 2482866A1 CA 002482866 A CA002482866 A CA 002482866A CA 2482866 A CA2482866 A CA 2482866A CA 2482866 A1 CA2482866 A1 CA 2482866A1
Authority
CA
Canada
Prior art keywords
error
concealing
predetermined criterion
erroneous
decoder
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
CA002482866A
Other languages
French (fr)
Other versions
CA2482866C (en
Inventor
Daniel Homm
Ralph Sperschneider
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2482866A1 publication Critical patent/CA2482866A1/en
Application granted granted Critical
Publication of CA2482866C publication Critical patent/CA2482866C/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6508—Flexibility, adaptability, parametrability and configurability of the implementation
    • H03M13/6516—Support of multiple code parameters, e.g. generalized Reed-Solomon decoder for a variety of generator polynomials or Galois fields
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/65—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience
    • H04N19/69—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving reversible variable length codes [RVLC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
    • H04N19/895—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder in combination with error concealment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Abstract

A device for concealing an error in an erroneous or potentially erroneous informa-tion unit generates output values of a forward decoder (14) and a backward decoder (16) which differ and thus indicate an error-concealment area (18). The different values for one and the same information unit are examined with regard to a predetermined criterion so as to select that value (22) which meets the predetermined criterion, i.e. which is plausible.
Thus, an elimination or reduction of the continuation errors introduced in the decoding of blocks of reversible code words of variable lengths is achieved without impacting the compression rate.
CA002482866A 2002-04-29 2003-04-07 Device and method for concealing an error Expired - Lifetime CA2482866C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10219133.6 2002-04-29
DE10219133A DE10219133B4 (en) 2002-04-29 2002-04-29 Apparatus and method for obscuring an error
PCT/EP2003/003607 WO2003094358A1 (en) 2002-04-29 2003-04-07 Device and method for masking a fault

Publications (2)

Publication Number Publication Date
CA2482866A1 true CA2482866A1 (en) 2003-11-13
CA2482866C CA2482866C (en) 2008-07-08

Family

ID=29224884

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002482866A Expired - Lifetime CA2482866C (en) 2002-04-29 2003-04-07 Device and method for concealing an error

Country Status (7)

Country Link
EP (1) EP1495548B1 (en)
AT (1) ATE318467T1 (en)
AU (1) AU2003226791A1 (en)
CA (1) CA2482866C (en)
DE (2) DE10219133B4 (en)
HK (1) HK1069026A1 (en)
WO (1) WO2003094358A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047051A2 (en) * 2006-10-20 2008-04-24 France Telecom Attenuation of overvoicing, in particular for generating an excitation at a decoder, in the absence of information

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104754A (en) * 1995-03-15 2000-08-15 Kabushiki Kaisha Toshiba Moving picture coding and/or decoding systems, and variable-length coding and/or decoding system
EP1802134A3 (en) * 1995-03-15 2008-12-31 Kabushiki Kaisha Toshiba Moving picture coding and/or decoding systems
JP3884172B2 (en) * 1997-10-02 2007-02-21 株式会社東芝 Variable length decoding apparatus and decoding method
DE19840835C2 (en) * 1998-09-07 2003-01-09 Fraunhofer Ges Forschung Apparatus and method for entropy coding information words and apparatus and method for decoding entropy coded information words
DE19921122C1 (en) * 1999-05-07 2001-01-25 Fraunhofer Ges Forschung Method and device for concealing an error in a coded audio signal and method and device for decoding a coded audio signal
DE19959038A1 (en) * 1999-12-08 2001-06-28 Bosch Gmbh Robert Process for decoding digital audio data

Also Published As

Publication number Publication date
WO2003094358A1 (en) 2003-11-13
DE10219133A1 (en) 2003-11-13
CA2482866C (en) 2008-07-08
EP1495548B1 (en) 2006-02-22
HK1069026A1 (en) 2005-05-06
EP1495548A1 (en) 2005-01-12
DE50302479D1 (en) 2006-04-27
AU2003226791A1 (en) 2003-11-17
DE10219133B4 (en) 2007-02-22
ATE318467T1 (en) 2006-03-15

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Effective date: 20230411

MKEX Expiry

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