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EP1845519A3 - Encoding and decoding of multi-channel audio signals based on a main and side signal representation - Google Patents

Encoding and decoding of multi-channel audio signals based on a main and side signal representation Download PDF

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Publication number
EP1845519A3
EP1845519A3 EP07109801A EP07109801A EP1845519A3 EP 1845519 A3 EP1845519 A3 EP 1845519A3 EP 07109801 A EP07109801 A EP 07109801A EP 07109801 A EP07109801 A EP 07109801A EP 1845519 A3 EP1845519 A3 EP 1845519A3
Authority
EP
European Patent Office
Prior art keywords
encoding
signal
main
decoding
mono
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
EP07109801A
Other languages
German (de)
French (fr)
Other versions
EP1845519B1 (en
EP1845519A2 (en
Inventor
Ingemar Johansson
Anisse Taleb
Stefan Bruhn
Daniel ENSTRÖM
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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Filing date
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 EP1845519A2 publication Critical patent/EP1845519A2/en
Publication of EP1845519A3 publication Critical patent/EP1845519A3/en
Application granted granted Critical
Publication of EP1845519B1 publication Critical patent/EP1845519B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Endoscopes (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

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 (xmono). The main signal (xmono) 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 (pside), being encoding parameters representing a side signal (xside). The side signal (xside) 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 (xside) to an energy contour of the main signal (xmono). A method of decoding is also presented as well as an encoder, a decoder and audio system, all according to the same basic idea.
EP07109801A 2003-12-19 2004-12-15 Encoding and decoding of multi-channel audio signals based on a main and side signal representation Expired - Lifetime EP1845519B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0303501A SE0303501D0 (en) 2003-12-19 2003-12-19 Filter-based parametric multi-channel coding
SE0400417A SE527670C2 (en) 2003-12-19 2004-02-20 Natural fidelity optimized coding with variable frame length
EP04820553A EP1623411B1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04820553A Division EP1623411B1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding

Publications (3)

Publication Number Publication Date
EP1845519A2 EP1845519A2 (en) 2007-10-17
EP1845519A3 true EP1845519A3 (en) 2007-11-07
EP1845519B1 EP1845519B1 (en) 2009-09-16

Family

ID=31996354

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04820553A Ceased EP1623411B1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding
EP07109801A Expired - Lifetime EP1845519B1 (en) 2003-12-19 2004-12-15 Encoding and decoding of multi-channel audio signals based on a main and side signal representation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04820553A Ceased EP1623411B1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding

Country Status (14)

Country Link
EP (2) EP1623411B1 (en)
JP (2) JP4335917B2 (en)
CN (2) CN100559465C (en)
AT (2) ATE443317T1 (en)
AU (1) AU2004298708B2 (en)
BR (2) BRPI0419281B1 (en)
CA (2) CA2527971C (en)
DE (2) DE602004008613T2 (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
CN100559465C (en) 2009-11-11
EP1623411A1 (en) 2006-02-08
ATE443317T1 (en) 2009-10-15
EP1623411B1 (en) 2007-08-29
CN101118747B (en) 2011-02-23
RU2305870C2 (en) 2007-09-10
HK1115665A1 (en) 2008-12-05
EP1845519B1 (en) 2009-09-16
MXPA05012230A (en) 2006-02-10
DE602004008613T2 (en) 2008-06-12
JP2008026914A (en) 2008-02-07
ZA200508980B (en) 2007-03-28
SE0400417D0 (en) 2004-02-20
CA2690885C (en) 2014-01-21
SE527670C2 (en) 2006-05-09
AU2004298708B2 (en) 2008-01-03
CA2527971C (en) 2011-03-15
RU2005134365A (en) 2006-05-27
HK1091585A1 (en) 2007-01-19
SE0400417L (en) 2005-06-20
WO2005059899A1 (en) 2005-06-30
RU2007121143A (en) 2008-12-10
DE602004023240D1 (en) 2009-10-29
CN1816847A (en) 2006-08-09
JP4589366B2 (en) 2010-12-01
BRPI0410856B8 (en) 2019-10-15
JP4335917B2 (en) 2009-09-30
CA2527971A1 (en) 2005-06-30
RU2425340C2 (en) 2011-07-27
JP2007529021A (en) 2007-10-18
CN101118747A (en) 2008-02-06
AU2004298708A1 (en) 2005-06-30
BRPI0410856B1 (en) 2019-10-01
PL1623411T3 (en) 2008-01-31
BRPI0419281B1 (en) 2018-08-14
BRPI0410856A (en) 2006-07-04
EP1845519A2 (en) 2007-10-17
ATE371924T1 (en) 2007-09-15
DE602004008613D1 (en) 2007-10-11

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