WO1995028824A3 - Method of encoding a signal containing speech - Google Patents

Method of encoding a signal containing speech Download PDF

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Publication number
WO1995028824A3
WO1995028824A3 PCT/US1995/004577 US9504577W WO9528824A3 WO 1995028824 A3 WO1995028824 A3 WO 1995028824A3 US 9504577 W US9504577 W US 9504577W WO 9528824 A3 WO9528824 A3 WO 9528824A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal containing
encoding
containing speech
speech
celp
Prior art date
Application number
PCT/US1995/004577
Other languages
French (fr)
Other versions
WO1995028824A2 (en
Inventor
Kumar Swaminathan
Kalyan Ganesan
Prabhat K Gupta
Original Assignee
Hughes Aircraft Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26921843&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1995028824(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co
Priority to AT95916376T priority Critical patent/ATE202232T1/en
Priority to DE69521254T priority patent/DE69521254D1/en
Priority to EP95916376A priority patent/EP0704088B1/en
Publication of WO1995028824A2 publication Critical patent/WO1995028824A2/en
Publication of WO1995028824A3 publication Critical patent/WO1995028824A3/en
Priority to FI956107A priority patent/FI956107A/en

Links

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
    • G10L19/012—Comfort noise or silence coding
    • 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
    • G10L19/26—Pre-filtering or post-filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/90—Pitch determination of speech signals
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0002—Codebook adaptations
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0003—Backward prediction of gain
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/09—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 zero crossing rates
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/18—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 spectral information of each sub-band
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/24—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 the cepstrum
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/93—Discriminating between voiced and unvoiced parts of speech signals

Abstract

A method of encoding a signal containing speech is employed in a bit rate Codebook Excited Linear Predictor (CELP) communication system. The system includes a transmitter that organizes a signal containing speech into frames of 40 millisecond duration, and classifies each frame as one of three modes: voiced and stationary, unvoiced or transient, and background noise.
PCT/US1995/004577 1994-04-15 1995-04-17 Method of encoding a signal containing speech WO1995028824A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT95916376T ATE202232T1 (en) 1994-04-15 1995-04-17 METHOD FOR VOICE CODING
DE69521254T DE69521254D1 (en) 1994-04-15 1995-04-17 METHOD FOR VOICE CODING
EP95916376A EP0704088B1 (en) 1994-04-15 1995-04-17 Method of encoding a signal containing speech
FI956107A FI956107A (en) 1994-04-15 1995-12-19 Procedure for encoding a signal containing speech

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US22788194A 1994-04-15 1994-04-15
US227,881 1994-04-15
US229,271 1994-04-18
US08/229,271 US5734789A (en) 1992-06-01 1994-04-18 Voiced, unvoiced or noise modes in a CELP vocoder

Publications (2)

Publication Number Publication Date
WO1995028824A2 WO1995028824A2 (en) 1995-11-02
WO1995028824A3 true WO1995028824A3 (en) 1995-11-16

Family

ID=26921843

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/004577 WO1995028824A2 (en) 1994-04-15 1995-04-17 Method of encoding a signal containing speech

Country Status (7)

Country Link
US (2) US5734789A (en)
EP (1) EP0704088B1 (en)
AT (1) ATE202232T1 (en)
CA (1) CA2165546A1 (en)
DE (1) DE69521254D1 (en)
FI (1) FI956107A (en)
WO (1) WO1995028824A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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US9190066B2 (en) 1998-09-18 2015-11-17 Mindspeed Technologies, Inc. Adaptive codebook gain control for speech coding

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