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ZA200508980B - Fidelity-optimised variable frame length encoding - Google Patents

Fidelity-optimised variable frame length encoding

Info

Publication number
ZA200508980B
ZA200508980B ZA200508980A ZA200508980A ZA200508980B ZA 200508980 B ZA200508980 B ZA 200508980B ZA 200508980 A ZA200508980 A ZA 200508980A ZA 200508980 A ZA200508980 A ZA 200508980A ZA 200508980 B ZA200508980 B ZA 200508980B
Authority
ZA
South Africa
Prior art keywords
signal
mono
encoding
fidelity
frame length
Prior art date
Application number
ZA200508980A
Inventor
Bruhn Stefan
Johansson Ingemar
Taleb Anisse
Enstroem Daniel
Original Assignee
Ericsson Telefon Ab L M
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
Priority claimed from SE0303501A external-priority patent/SE0303501D0/en
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of ZA200508980B publication Critical patent/ZA200508980B/en

Links

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)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (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 (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.
ZA200508980A 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding ZA200508980B (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
PCT/SE2004/001867 WO2005059899A1 (en) 2003-12-19 2004-12-15 Fidelity-optimised variable frame length encoding

Publications (1)

Publication Number Publication Date
ZA200508980B true ZA200508980B (en) 2007-03-28

Family

ID=31996354

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200508980A ZA200508980B (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
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
EP1845519A3 (en) 2007-11-07

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