IN2012DN05235A - - Google Patents

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Publication number
IN2012DN05235A
IN2012DN05235A IN5235DEN2012A IN2012DN05235A IN 2012DN05235 A IN2012DN05235 A IN 2012DN05235A IN 5235DEN2012 A IN5235DEN2012 A IN 5235DEN2012A IN 2012DN05235 A IN2012DN05235 A IN 2012DN05235A
Authority
IN
India
Prior art keywords
periodicity
pitch periods
stationarity
index
predetermined time
Prior art date
Application number
Inventor
Takehiro Moriya
Noboru Harada
Yutaka Kamamoto
Original Assignee
Nippon Telegraph & Telephone
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 Nippon Telegraph & Telephone filed Critical Nippon Telegraph & Telephone
Publication of IN2012DN05235A publication Critical patent/IN2012DN05235A/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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor
    • 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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • 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

Abstract

In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity andlor stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index . indicating a periodicity and/or stationarity level, the index being included in or obtained fiom an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity andor stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.
IN5235DEN2012 2010-01-08 2011-01-07 IN2012DN05235A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010002494 2010-01-08
PCT/JP2011/050186 WO2011083849A1 (en) 2010-01-08 2011-01-07 Encoding method, decoding method, encoder apparatus, decoder apparatus, program and recording medium

Publications (1)

Publication Number Publication Date
IN2012DN05235A true IN2012DN05235A (en) 2015-10-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
IN5235DEN2012 IN2012DN05235A (en) 2010-01-08 2011-01-07

Country Status (9)

Country Link
US (4) US9812141B2 (en)
EP (1) EP2523189B1 (en)
JP (3) JP5314771B2 (en)
KR (1) KR101381272B1 (en)
CN (2) CN105374362B (en)
ES (1) ES2508590T3 (en)
IN (1) IN2012DN05235A (en)
RU (1) RU2510974C2 (en)
WO (1) WO2011083849A1 (en)

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Also Published As

Publication number Publication date
CN105374362A (en) 2016-03-02
CN105374362B (en) 2019-05-10
RU2012127132A (en) 2014-02-27
US10049680B2 (en) 2018-08-14
JP2013156649A (en) 2013-08-15
RU2510974C2 (en) 2014-04-10
US20180040330A1 (en) 2018-02-08
CN102687199B (en) 2015-11-25
US20120265525A1 (en) 2012-10-18
JP5314771B2 (en) 2013-10-16
US20180047402A1 (en) 2018-02-15
CN102687199A (en) 2012-09-19
JP5627144B2 (en) 2014-11-19
JP2013137574A (en) 2013-07-11
KR101381272B1 (en) 2014-04-07
WO2011083849A1 (en) 2011-07-14
EP2523189B1 (en) 2014-09-03
US10056088B2 (en) 2018-08-21
KR20120089349A (en) 2012-08-09
JPWO2011083849A1 (en) 2013-05-16
ES2508590T3 (en) 2014-10-16
EP2523189A1 (en) 2012-11-14
JP5442887B2 (en) 2014-03-12
US20180040329A1 (en) 2018-02-08
EP2523189A4 (en) 2013-08-14
US9812141B2 (en) 2017-11-07
US10049679B2 (en) 2018-08-14

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