CA2238026C - Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation - Google Patents

Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation Download PDF

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Publication number
CA2238026C
CA2238026C CA002238026A CA2238026A CA2238026C CA 2238026 C CA2238026 C CA 2238026C CA 002238026 A CA002238026 A CA 002238026A CA 2238026 A CA2238026 A CA 2238026A CA 2238026 C CA2238026 C CA 2238026C
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CA
Canada
Prior art keywords
audio
subband
subframe
bit
rate
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.)
Expired - Lifetime
Application number
CA002238026A
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English (en)
French (fr)
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CA2238026A1 (en
Inventor
Stephen M. Smyth
Michael H. Smyth
William Paul Smith
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DTS Inc
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Digital Theater Systems Inc
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Priority to CA002331611A priority Critical patent/CA2331611C/en
Publication of CA2238026A1 publication Critical patent/CA2238026A1/en
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Publication of CA2238026C publication Critical patent/CA2238026C/en
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    • 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
    • G10L19/0204—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 using subband decomposition
    • G10L19/0208—Subband vocoders
    • 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

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  • 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)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Stereophonic System (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Color Television Systems (AREA)
CA002238026A 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation Expired - Lifetime CA2238026C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002331611A CA2331611C (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US789695P 1995-12-01 1995-12-01
US60/007,896 1995-12-01
US08/642,254 1996-05-02
US08/642,254 US5956674A (en) 1995-12-01 1996-05-02 Multi-channel predictive subband audio coder using psychoacoustic adaptive bit allocation in frequency, time and over the multiple channels
PCT/US1996/018764 WO1997021211A1 (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002331611A Division CA2331611C (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation

Publications (2)

Publication Number Publication Date
CA2238026A1 CA2238026A1 (en) 1997-06-12
CA2238026C true CA2238026C (en) 2002-07-09

Family

ID=26677495

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002238026A Expired - Lifetime CA2238026C (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation
CA002331611A Expired - Lifetime CA2331611C (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002331611A Expired - Lifetime CA2331611C (en) 1995-12-01 1996-11-21 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation

Country Status (17)

Country Link
US (4) US5956674A (enExample)
EP (1) EP0864146B1 (enExample)
JP (1) JP4174072B2 (enExample)
KR (1) KR100277819B1 (enExample)
CN (5) CN1132151C (enExample)
AT (1) ATE279770T1 (enExample)
AU (1) AU705194B2 (enExample)
BR (1) BR9611852A (enExample)
CA (2) CA2238026C (enExample)
DE (1) DE69633633T2 (enExample)
DK (1) DK0864146T3 (enExample)
EA (1) EA001087B1 (enExample)
ES (1) ES2232842T3 (enExample)
MX (1) MX9804320A (enExample)
PL (3) PL183092B1 (enExample)
PT (1) PT864146E (enExample)
WO (1) WO1997021211A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12424229B2 (en) 2014-06-27 2025-09-23 Dolby Laboratories Licensing Corporation Methods and apparatus for determining for decoding a compressed HOA sound representation

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