DE602004008613D1 - TREUE OPTIMIZED CODING WITH VARIABLE FRAME LENGTH - Google Patents

TREUE OPTIMIZED CODING WITH VARIABLE FRAME LENGTH

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Publication number
DE602004008613D1
DE602004008613D1 DE602004008613T DE602004008613T DE602004008613D1 DE 602004008613 D1 DE602004008613 D1 DE 602004008613D1 DE 602004008613 T DE602004008613 T DE 602004008613T DE 602004008613 T DE602004008613 T DE 602004008613T DE 602004008613 D1 DE602004008613 D1 DE 602004008613D1
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DE
Germany
Prior art keywords
signal
mono
encoding
treue
frame length
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.)
Active
Application number
DE602004008613T
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German (de)
Other versions
DE602004008613T2 (en
Inventor
Stefan Bruhn
Ingemar Johansson
Anisse Taleb
Daniel Enstroem
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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Publication date
Priority claimed from SE0303501A external-priority patent/SE0303501D0/en
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of DE602004008613D1 publication Critical patent/DE602004008613D1/en
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Publication of DE602004008613T2 publication Critical patent/DE602004008613T2/en
Active legal-status Critical Current
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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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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

Abstract

A method of encoding multi-channel audio signals comprises generating of a first output signal (x' mono ), being encoding (38) parameters representing a main signal (x mono ). The main signal (x mono ) is a first linear combination (34) of signals (16A,16B) of at least a first and a second channel. The method further comprises generating (30) of a second output signal (p side ), being encoding parameters representing a side signal (x side ). The side signal (x side ) is a second linear combination (36) of signals (16A,16B) of at least the first and the second channel within an encoding frame. The method is characterised in that the generating of the second output signal further comprises scaling of the side signal (x side ) to an energy contour of the main signal (x mono ). A method of decoding is also presented as well as an encoder, a decoder and audio system, all according to the same basic idea.
DE602004008613T 2003-12-19 2004-12-15 TREUE OPTIMIZED CODING WITH VARIABLE FRAME LENGTH Active DE602004008613T2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE0303501A SE0303501D0 (en) 2003-12-19 2003-12-19 Filter-based parametric multi-channel coding
SE0303501 2003-12-19
SE0400417 2004-02-20
SE0400417A SE527670C2 (en) 2003-12-19 2004-02-20 Natural fidelity optimized coding with variable frame length
PCT/SE2004/001867 WO2005059899A1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding

Publications (2)

Publication Number Publication Date
DE602004008613D1 true DE602004008613D1 (en) 2007-10-11
DE602004008613T2 DE602004008613T2 (en) 2008-06-12

Family

ID=31996354

Family Applications (2)

Application Number Title Priority Date Filing Date
DE602004023240T Active DE602004023240D1 (en) 2003-12-19 2004-12-15 Coding and decoding of multi-channel sound signals based on a main and sub signal representation
DE602004008613T Active DE602004008613T2 (en) 2003-12-19 2004-12-15 TREUE OPTIMIZED CODING WITH VARIABLE FRAME LENGTH

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE602004023240T Active DE602004023240D1 (en) 2003-12-19 2004-12-15 Coding and decoding of multi-channel sound signals based on a main and sub signal representation

Country Status (15)

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EP (2) EP1623411B1 (en)
JP (2) JP4335917B2 (en)
CN (2) CN101118747B (en)
AT (2) ATE371924T1 (en)
AU (1) AU2004298708B2 (en)
BR (2) BRPI0419281B1 (en)
CA (2) CA2527971C (en)
DE (2) DE602004023240D1 (en)
HK (2) HK1115665A1 (en)
MX (1) MXPA05012230A (en)
PL (1) PL1623411T3 (en)
RU (2) RU2305870C2 (en)
SE (1) SE527670C2 (en)
WO (1) WO2005059899A1 (en)
ZA (1) ZA200508980B (en)

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Also Published As

Publication number Publication date
CA2690885A1 (en) 2005-06-30
AU2004298708A1 (en) 2005-06-30
CN101118747B (en) 2011-02-23
EP1845519A3 (en) 2007-11-07
CA2690885C (en) 2014-01-21
EP1845519B1 (en) 2009-09-16
PL1623411T3 (en) 2008-01-31
CA2527971C (en) 2011-03-15
BRPI0410856B8 (en) 2019-10-15
RU2005134365A (en) 2006-05-27
EP1845519A2 (en) 2007-10-17
CN1816847A (en) 2006-08-09
HK1115665A1 (en) 2008-12-05
RU2425340C2 (en) 2011-07-27
BRPI0410856B1 (en) 2019-10-01
EP1623411A1 (en) 2006-02-08
SE0400417D0 (en) 2004-02-20
ATE371924T1 (en) 2007-09-15
JP4589366B2 (en) 2010-12-01
AU2004298708B2 (en) 2008-01-03
HK1091585A1 (en) 2007-01-19
RU2007121143A (en) 2008-12-10
BRPI0410856A (en) 2006-07-04
WO2005059899A1 (en) 2005-06-30
CA2527971A1 (en) 2005-06-30
DE602004008613T2 (en) 2008-06-12
SE527670C2 (en) 2006-05-09
SE0400417L (en) 2005-06-20
ZA200508980B (en) 2007-03-28
BRPI0419281B1 (en) 2018-08-14
CN101118747A (en) 2008-02-06
RU2305870C2 (en) 2007-09-10
JP2008026914A (en) 2008-02-07
ATE443317T1 (en) 2009-10-15
MXPA05012230A (en) 2006-02-10
DE602004023240D1 (en) 2009-10-29
JP4335917B2 (en) 2009-09-30
JP2007529021A (en) 2007-10-18
CN100559465C (en) 2009-11-11
EP1623411B1 (en) 2007-08-29

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