ATE371924T1 - FIDELITY-OPTIMIZED CODING WITH VARIABLE FRAME LENGTH - Google Patents

FIDELITY-OPTIMIZED CODING WITH VARIABLE FRAME LENGTH

Info

Publication number
ATE371924T1
ATE371924T1 AT04820553T AT04820553T ATE371924T1 AT E371924 T1 ATE371924 T1 AT E371924T1 AT 04820553 T AT04820553 T AT 04820553T AT 04820553 T AT04820553 T AT 04820553T AT E371924 T1 ATE371924 T1 AT E371924T1
Authority
AT
Austria
Prior art keywords
signal
mono
encoding
fidelity
frame length
Prior art date
Application number
AT04820553T
Other languages
German (de)
Inventor
Stefan Bruhn
Ingemar Johansson
Anisse Taleb
Daniel Enstroem
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
Application granted granted Critical
Publication of ATE371924T1 publication Critical patent/ATE371924T1/en

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
    • G10L19/008—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.
AT04820553T 2003-12-19 2004-12-15 FIDELITY-OPTIMIZED CODING WITH VARIABLE FRAME LENGTH ATE371924T1 (en)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
ATE371924T1 true ATE371924T1 (en) 2007-09-15

Family

ID=31996354

Family Applications (2)

Application Number Title Priority Date Filing Date
AT07109801T ATE443317T1 (en) 2003-12-19 2004-12-15 CODING AND DECODING OF MULTI-CHANNEL SIGNALS BASED ON A MAIN AND SECONDARY SIGNAL REPRESENTATION
AT04820553T ATE371924T1 (en) 2003-12-19 2004-12-15 FIDELITY-OPTIMIZED CODING WITH VARIABLE FRAME LENGTH

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT07109801T ATE443317T1 (en) 2003-12-19 2004-12-15 CODING AND DECODING OF MULTI-CHANNEL SIGNALS BASED ON A MAIN AND SECONDARY SIGNAL REPRESENTATION

Country Status (15)

Country Link
EP (2) EP1623411B1 (en)
JP (2) JP4335917B2 (en)
CN (2) CN101118747B (en)
AT (2) ATE443317T1 (en)
AU (1) AU2004298708B2 (en)
BR (2) BRPI0419281B1 (en)
CA (2) CA2527971C (en)
DE (2) DE602004008613T2 (en)
HK (2) HK1091585A1 (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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Publication number Publication date
ZA200508980B (en) 2007-03-28
RU2425340C2 (en) 2011-07-27
BRPI0410856B8 (en) 2019-10-15
RU2305870C2 (en) 2007-09-10
PL1623411T3 (en) 2008-01-31
CN101118747A (en) 2008-02-06
JP4335917B2 (en) 2009-09-30
HK1115665A1 (en) 2008-12-05
DE602004008613T2 (en) 2008-06-12
EP1845519A3 (en) 2007-11-07
EP1845519B1 (en) 2009-09-16
AU2004298708B2 (en) 2008-01-03
RU2005134365A (en) 2006-05-27
CN1816847A (en) 2006-08-09
JP2007529021A (en) 2007-10-18
EP1623411A1 (en) 2006-02-08
DE602004023240D1 (en) 2009-10-29
DE602004008613D1 (en) 2007-10-11
HK1091585A1 (en) 2007-01-19
ATE443317T1 (en) 2009-10-15
SE0400417L (en) 2005-06-20
CN100559465C (en) 2009-11-11
JP4589366B2 (en) 2010-12-01
JP2008026914A (en) 2008-02-07
AU2004298708A1 (en) 2005-06-30
EP1623411B1 (en) 2007-08-29
BRPI0410856B1 (en) 2019-10-01
CN101118747B (en) 2011-02-23
EP1845519A2 (en) 2007-10-17
SE0400417D0 (en) 2004-02-20
CA2527971A1 (en) 2005-06-30
BRPI0419281B1 (en) 2018-08-14
SE527670C2 (en) 2006-05-09
CA2527971C (en) 2011-03-15
CA2690885A1 (en) 2005-06-30
MXPA05012230A (en) 2006-02-10
WO2005059899A1 (en) 2005-06-30
BRPI0410856A (en) 2006-07-04
RU2007121143A (en) 2008-12-10
CA2690885C (en) 2014-01-21

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