CA2284220A1 - Method for signalling a noise substitution during audio signal coding - Google Patents

Method for signalling a noise substitution during audio signal coding Download PDF

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Publication number
CA2284220A1
CA2284220A1 CA002284220A CA2284220A CA2284220A1 CA 2284220 A1 CA2284220 A1 CA 2284220A1 CA 002284220 A CA002284220 A CA 002284220A CA 2284220 A CA2284220 A CA 2284220A CA 2284220 A1 CA2284220 A1 CA 2284220A1
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Canada
Prior art keywords
group
noise
coding
signalling
audio signal
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CA002284220A
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French (fr)
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CA2284220C (en
Inventor
Jurgen Herre
Uwe Gbur
Andreas Ehret
Martin Dietz
Bodo Teichmann
Oliver Kunz
Karlheinz Brandenburg
Heinz Gerhauser
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Publication of CA2284220A1 publication Critical patent/CA2284220A1/en
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Publication of CA2284220C publication Critical patent/CA2284220C/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • 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
    • G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/665—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using psychoacoustic properties of the ear, e.g. masking effect

Abstract

The invention relates to a method for signalling a noise substitution during audio signal coding. According to said method, the audio signal is first transformed in the frequency range to obtain spectral values. The spectral values are subsequently grouped to form spectral value groups. On the basis of a detection whether a group of spectral values is a noise group or not, a coding table is allocated to a non-noise group or a tonal group by means of a coding table number for redundancy coding of the same. If a group is a noise group it is allocated an additional coding table number which does not refer to a coding table in order to signal that this group is a noise group and that it must not be redundancy coded. By signalling noise substitution by means of a Huffman-code table number for noise groups of spectral values which are for instance scale factor band sections and which must not be redundancy coded, an opportunity is provided for implementing availability of a noise substitution in a scale factor band in the bit flow syntax of the MPEG-2 Advanced Audio coding Standard, without intervening in the basic coding structure and without having to touch the structure of the existing bit flow syntax.
CA002284220A 1997-07-14 1998-03-13 Method for signalling a noise substitution during audio signal coding Expired - Lifetime CA2284220C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19730129A DE19730129C2 (en) 1997-07-14 1997-07-14 Method for signaling noise substitution when encoding an audio signal
DE19730129.0 1997-07-14
PCT/EP1998/001480 WO1999004505A1 (en) 1997-07-14 1998-03-13 Method for signalling a noise substitution during audio signal coding

Publications (2)

Publication Number Publication Date
CA2284220A1 true CA2284220A1 (en) 1999-01-28
CA2284220C CA2284220C (en) 2002-09-24

Family

ID=7835662

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002284220A Expired - Lifetime CA2284220C (en) 1997-07-14 1998-03-13 Method for signalling a noise substitution during audio signal coding

Country Status (13)

Country Link
US (1) US6766293B1 (en)
EP (1) EP0931386B1 (en)
JP (2) JP3926399B2 (en)
KR (1) KR100304055B1 (en)
AT (1) ATE194440T1 (en)
AU (1) AU716982B2 (en)
CA (1) CA2284220C (en)
DE (2) DE19730129C2 (en)
DK (1) DK0931386T3 (en)
ES (1) ES2150313T3 (en)
GR (1) GR3033861T3 (en)
PT (1) PT931386E (en)
WO (1) WO1999004505A1 (en)

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US7684981B2 (en) * 2005-07-15 2010-03-23 Microsoft Corporation Prediction of spectral coefficients in waveform coding and decoding
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US7933337B2 (en) * 2005-08-12 2011-04-26 Microsoft Corporation Prediction of transform coefficients for image compression
US7565018B2 (en) * 2005-08-12 2009-07-21 Microsoft Corporation Adaptive coding and decoding of wide-range coefficients
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US8190425B2 (en) * 2006-01-20 2012-05-29 Microsoft Corporation Complex cross-correlation parameters for multi-channel audio
US7953604B2 (en) 2006-01-20 2011-05-31 Microsoft Corporation Shape and scale parameters for extended-band frequency coding
JP2009534713A (en) * 2006-04-24 2009-09-24 ネロ アーゲー Apparatus and method for encoding digital audio data having a reduced bit rate
US8184710B2 (en) * 2007-02-21 2012-05-22 Microsoft Corporation Adaptive truncation of transform coefficient data in a transform-based digital media codec
US7774205B2 (en) * 2007-06-15 2010-08-10 Microsoft Corporation Coding of sparse digital media spectral data
US7761290B2 (en) 2007-06-15 2010-07-20 Microsoft Corporation Flexible frequency and time partitioning in perceptual transform coding of audio
US8046214B2 (en) 2007-06-22 2011-10-25 Microsoft Corporation Low complexity decoder for complex transform coding of multi-channel sound
US7885819B2 (en) 2007-06-29 2011-02-08 Microsoft Corporation Bitstream syntax for multi-process audio decoding
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Also Published As

Publication number Publication date
CA2284220C (en) 2002-09-24
EP0931386B1 (en) 2000-07-05
JP3878952B2 (en) 2007-02-07
KR20000070280A (en) 2000-11-25
PT931386E (en) 2000-10-31
KR100304055B1 (en) 2001-11-03
JP2000515266A (en) 2000-11-14
JP2005049889A (en) 2005-02-24
GR3033861T3 (en) 2000-10-31
WO1999004505A1 (en) 1999-01-28
DE19730129A1 (en) 1999-01-21
AU716982B2 (en) 2000-03-16
JP3926399B2 (en) 2007-06-06
ATE194440T1 (en) 2000-07-15
DK0931386T3 (en) 2000-11-20
DE59800189D1 (en) 2000-08-10
AU7035298A (en) 1999-02-10
US6766293B1 (en) 2004-07-20
EP0931386A1 (en) 1999-07-28
DE19730129C2 (en) 2002-03-07
ES2150313T3 (en) 2000-11-16

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