WO2014062304A3 - Hierarchical decorrelation of multichannel audio - Google Patents

Hierarchical decorrelation of multichannel audio Download PDF

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Publication number
WO2014062304A3
WO2014062304A3 PCT/US2013/058365 US2013058365W WO2014062304A3 WO 2014062304 A3 WO2014062304 A3 WO 2014062304A3 US 2013058365 W US2013058365 W US 2013058365W WO 2014062304 A3 WO2014062304 A3 WO 2014062304A3
Authority
WO
WIPO (PCT)
Prior art keywords
algorithm
decorrelation
multichannel audio
hierarchical decorrelation
hierarchical
Prior art date
Application number
PCT/US2013/058365
Other languages
French (fr)
Other versions
WO2014062304A2 (en
Inventor
Li Minyue
Willem Bastiaan Kleijn
Jan Skoglund
Original Assignee
Google Inc.
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 Google Inc. filed Critical Google Inc.
Publication of WO2014062304A2 publication Critical patent/WO2014062304A2/en
Publication of WO2014062304A3 publication Critical patent/WO2014062304A3/en

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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
    • G10L19/04—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
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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
    • G10L19/02—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
    • G10L19/0212—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 orthogonal transformation
    • 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
    • G10L19/02—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
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G10L19/035—Scalar quantisation
    • 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
    • G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes

Abstract

Provided are methods, systems, and apparatus for hierarchical decorrelation of multichannel audio. A hierarchical decorrelation algorithm is designed to adapt to possibly changing characteristics of an input signal, and also preserves the energy of the original signal. The algorithm is invertible in that the original signal can be retrieved if needed. Furthermore, the proposed algorithm decomposes the decorrelation process into multiple low-complexity steps. The contribution of these steps is generally in a decreasing order, and thus the complexity of the algorithm can be scaled.
PCT/US2013/058365 2012-10-18 2013-09-06 Hierarchical decorrelation of multichannel audio WO2014062304A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/655,225 2012-10-18
US13/655,225 US9396732B2 (en) 2012-10-18 2012-10-18 Hierarchical deccorelation of multichannel audio

Publications (2)

Publication Number Publication Date
WO2014062304A2 WO2014062304A2 (en) 2014-04-24
WO2014062304A3 true WO2014062304A3 (en) 2014-08-14

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Application Number Title Priority Date Filing Date
PCT/US2013/058365 WO2014062304A2 (en) 2012-10-18 2013-09-06 Hierarchical decorrelation of multichannel audio

Country Status (2)

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US (4) US9396732B2 (en)
WO (1) WO2014062304A2 (en)

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Also Published As

Publication number Publication date
US10553234B2 (en) 2020-02-04
US10141000B2 (en) 2018-11-27
US20190096418A1 (en) 2019-03-28
WO2014062304A2 (en) 2014-04-24
US20160293176A1 (en) 2016-10-06
US20140112481A1 (en) 2014-04-24
US11380342B2 (en) 2022-07-05
US20200176009A1 (en) 2020-06-04
US9396732B2 (en) 2016-07-19

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