WO2006116024A3 - Systems, methods, and apparatus for gain factor attenuation - Google Patents

Systems, methods, and apparatus for gain factor attenuation Download PDF

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Publication number
WO2006116024A3
WO2006116024A3 PCT/US2006/014992 US2006014992W WO2006116024A3 WO 2006116024 A3 WO2006116024 A3 WO 2006116024A3 US 2006014992 W US2006014992 W US 2006014992W WO 2006116024 A3 WO2006116024 A3 WO 2006116024A3
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WO
WIPO (PCT)
Prior art keywords
gain factor
signal
systems
methods
envelopes
Prior art date
Application number
PCT/US2006/014992
Other languages
French (fr)
Other versions
WO2006116024A2 (en
Inventor
Koen Bernard Vos
Ananthapadmanabhan A Kandhadai
Original Assignee
Qualcomm Inc
Koen Bernard Vos
Ananthapadmanabhan A Kandhadai
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 Qualcomm Inc, Koen Bernard Vos, Ananthapadmanabhan A Kandhadai filed Critical Qualcomm Inc
Priority to EP06758453.2A priority Critical patent/EP1875464B9/en
Priority to CN2006800215134A priority patent/CN101199003B/en
Publication of WO2006116024A2 publication Critical patent/WO2006116024A2/en
Publication of WO2006116024A3 publication Critical patent/WO2006116024A3/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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS 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
    • 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
    • G10L19/0204—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
    • 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
    • G10L19/04—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
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques

Abstract

A method of signal processing according to one embodiment includes calculating an envelope of a first signal that is based on a low-frequency portion of a speech signal, calculating an envelope of a second signal that is based on a high-frequency portion of the speech signal, and calculating a plurality of gain factor values according to a time-varying relation between the envelopes of the first and second signal. The method includes attenuating, based on a variation over time of a relation between the envelopes of the first and second signals, at least one of the plurality of gain factor values. In one example, the variation over time of a relation between the envelopes is indicated by at least one distance among the plurality of gain factor values.
PCT/US2006/014992 2005-04-22 2006-04-21 Systems, methods, and apparatus for gain factor attenuation WO2006116024A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06758453.2A EP1875464B9 (en) 2005-04-22 2006-04-21 Method, storage medium and apparatus for gain factor attenuation
CN2006800215134A CN101199003B (en) 2005-04-22 2006-04-21 Systems, methods, and apparatus for gain factor attenuation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67396505P 2005-04-22 2005-04-22
US60/673,965 2005-04-22

Publications (2)

Publication Number Publication Date
WO2006116024A2 WO2006116024A2 (en) 2006-11-02
WO2006116024A3 true WO2006116024A3 (en) 2007-03-22

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2006/014993 WO2006116025A1 (en) 2005-04-22 2006-04-21 Systems, methods, and apparatus for gain factor smoothing
PCT/US2006/014992 WO2006116024A2 (en) 2005-04-22 2006-04-21 Systems, methods, and apparatus for gain factor attenuation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/US2006/014993 WO2006116025A1 (en) 2005-04-22 2006-04-21 Systems, methods, and apparatus for gain factor smoothing

Country Status (14)

Country Link
US (2) US8892448B2 (en)
EP (2) EP1875464B9 (en)
KR (2) KR100947421B1 (en)
CN (3) CN101199004B (en)
DK (1) DK1875463T3 (en)
ES (1) ES2705589T3 (en)
HU (1) HUE040628T2 (en)
NO (1) NO20075509L (en)
PL (1) PL1875463T3 (en)
PT (1) PT1875463T (en)
SI (1) SI1875463T1 (en)
TR (1) TR201821299T4 (en)
TW (2) TWI317933B (en)
WO (2) WO2006116025A1 (en)

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