IN2015MN01954A - - Google Patents

Info

Publication number
IN2015MN01954A
IN2015MN01954A IN1954MUN2015A IN2015MN01954A IN 2015MN01954 A IN2015MN01954 A IN 2015MN01954A IN 1954MUN2015 A IN1954MUN2015 A IN 1954MUN2015A IN 2015MN01954 A IN2015MN01954 A IN 2015MN01954A
Authority
IN
India
Prior art keywords
audio data
decorrelation
involve
audio
decorrelation process
Prior art date
Application number
Inventor
Vinay Melkote
Kuan Chieh YEN
Grant A Davidson
Matthew Fellers
Mark S Vinton
Vivek Kumar
Original Assignee
Dolby Lab Licensing Corp
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
Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of IN2015MN01954A publication Critical patent/IN2015MN01954A/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
    • G10L19/02—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
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/06—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being correlation coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Stereophonic System (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Audio processing methods may involve receiving audio data corresponding to a plurality of audio channels. The audio data may include a frequency domain representation corresponding to filterbank coefficients of an audio encoding or processing system. A decorrelation process may be performed with the same filterbank coefficients used by the audio encoding or processing system. The decorrelation process may be performed without converting coefficients of the frequency domain representation to another frequency domain or time domain representation. The decorrelation process may involve selective or signal adaptive decorrelation of specific channels and/or specific frequency bands. The decorrelation process may involve applying a decorrelation filter to a portion of the received audio data to produce filtered audio data. The decorrelation process may involve using a non hierarchal mixer to combine a direct portion of the received audio data with the filtered audio data according to spatial parameters.
IN1954MUN2015 2013-02-14 2014-01-22 IN2015MN01954A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361764837P 2013-02-14 2013-02-14
PCT/US2014/012453 WO2014126682A1 (en) 2013-02-14 2014-01-22 Signal decorrelation in an audio processing system

Publications (1)

Publication Number Publication Date
IN2015MN01954A true IN2015MN01954A (en) 2015-08-28

Family

ID=50064800

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1954MUN2015 IN2015MN01954A (en) 2013-02-14 2014-01-22

Country Status (11)

Country Link
US (1) US9830916B2 (en)
EP (1) EP2956933B1 (en)
JP (1) JP6038355B2 (en)
KR (1) KR102114648B1 (en)
CN (1) CN104995676B (en)
BR (1) BR112015018981B1 (en)
ES (1) ES2613478T3 (en)
IN (1) IN2015MN01954A (en)
RU (1) RU2614381C2 (en)
TW (1) TWI618050B (en)
WO (1) WO2014126682A1 (en)

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Also Published As

Publication number Publication date
EP2956933B1 (en) 2016-11-16
US20150380000A1 (en) 2015-12-31
CN104995676B (en) 2018-03-30
JP6038355B2 (en) 2016-12-07
RU2015133287A (en) 2017-02-21
KR20150106949A (en) 2015-09-22
BR112015018981A2 (en) 2017-07-18
TWI618050B (en) 2018-03-11
TW201443877A (en) 2014-11-16
RU2614381C2 (en) 2017-03-24
CN104995676A (en) 2015-10-21
BR112015018981B1 (en) 2022-02-01
HK1213686A1 (en) 2016-07-08
JP2016510433A (en) 2016-04-07
EP2956933A1 (en) 2015-12-23
US9830916B2 (en) 2017-11-28
ES2613478T3 (en) 2017-05-24
WO2014126682A1 (en) 2014-08-21
KR102114648B1 (en) 2020-05-26

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