WO1998004046A3 - Enhanced encoding of dtmf and other signalling tones - Google Patents

Enhanced encoding of dtmf and other signalling tones Download PDF

Info

Publication number
WO1998004046A3
WO1998004046A3 PCT/CA1997/000516 CA9700516W WO9804046A3 WO 1998004046 A3 WO1998004046 A3 WO 1998004046A3 CA 9700516 W CA9700516 W CA 9700516W WO 9804046 A3 WO9804046 A3 WO 9804046A3
Authority
WO
WIPO (PCT)
Prior art keywords
spectrum
spectrum vector
voice signal
codebook
vector
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.)
Ceased
Application number
PCT/CA1997/000516
Other languages
French (fr)
Other versions
WO1998004046A2 (en
Inventor
Redwan Salami
Claude Laflamme
Jean-Pierre Adoul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universite de Sherbrooke
Original Assignee
Universite de Sherbrooke
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 Universite de Sherbrooke filed Critical Universite de Sherbrooke
Priority to AU35345/97A priority Critical patent/AU3534597A/en
Priority to EP97931602A priority patent/EP0913034A2/en
Publication of WO1998004046A2 publication Critical patent/WO1998004046A2/en
Publication of WO1998004046A3 publication Critical patent/WO1998004046A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G10L19/04—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
    • G10L19/07—Line spectrum pair [LSP] vocoders
    • 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
    • G10L19/04—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
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0016—Codebook for LPC parameters
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

In a method and device for quantizing a spectrum vector, supplied at recurrent time intervals, to produce a spectrum index, a spectrum-vector quantization codebook including a first voice-signal quantization codebook portion and a second non-voice signal quantization codebook portion is used. Whether the spectrum vector represents a voice signal or a non-voice signal is detected. When the spectrum vector represents a voice signal, the first codebook portion is searched for quantizing the spectrum vector and producing the spectrum index. The second codebook portion is searched for quantizing the spectrum vector and producing the spectrum index when the spectrum vector represents a non-voice signal. According to a first alternative, the first and second codebook portions are searched by measuring a weighted distance between the spectrum vector and the entries of these two codebook portions, and the spectrum vector is considered as representing a non-voice signal when the smallest weighted distance is the weighted distance measured between the spectrum vector and one entry of the second codebook portion. According to a second alternative, a weighted distance is measured between the spectrum vector and the entries of the second codebook portion, and the spectrum vector is considered as representing a non-voice signal when the weighted distance measured between the spectrum vector and one entry of the second codebook portion is smaller than a predetermined threshold.
PCT/CA1997/000516 1996-07-17 1997-07-17 Enhanced encoding of dtmf and other signalling tones Ceased WO1998004046A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU35345/97A AU3534597A (en) 1996-07-17 1997-07-17 Enhanced encoding of dtmf and other signalling tones
EP97931602A EP0913034A2 (en) 1996-07-17 1997-07-17 Enhanced encoding of dtmf and other signalling tones

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2191196P 1996-07-17 1996-07-17
US60/021,911 1996-07-17

Publications (2)

Publication Number Publication Date
WO1998004046A2 WO1998004046A2 (en) 1998-01-29
WO1998004046A3 true WO1998004046A3 (en) 1998-03-26

Family

ID=21806795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1997/000516 Ceased WO1998004046A2 (en) 1996-07-17 1997-07-17 Enhanced encoding of dtmf and other signalling tones

Country Status (4)

Country Link
EP (1) EP0913034A2 (en)
AU (1) AU3534597A (en)
CA (1) CA2258183A1 (en)
WO (1) WO1998004046A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7957963B2 (en) 2003-01-30 2011-06-07 Digital Voice Systems, Inc. Voice transcoder
US8315860B2 (en) 2002-11-13 2012-11-20 Digital Voice Systems, Inc. Interoperable vocoder

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002055699A (en) 2000-08-10 2002-02-20 Mitsubishi Electric Corp Audio encoding device and audio encoding method
US8359197B2 (en) 2003-04-01 2013-01-22 Digital Voice Systems, Inc. Half-rate vocoder
US8036886B2 (en) 2006-12-22 2011-10-11 Digital Voice Systems, Inc. Estimation of pulsed speech model parameters
US11270714B2 (en) 2020-01-08 2022-03-08 Digital Voice Systems, Inc. Speech coding using time-varying interpolation
US12254895B2 (en) 2021-07-02 2025-03-18 Digital Voice Systems, Inc. Detecting and compensating for the presence of a speaker mask in a speech signal
US11990144B2 (en) 2021-07-28 2024-05-21 Digital Voice Systems, Inc. Reducing perceived effects of non-voice data in digital speech
US12451151B2 (en) 2022-04-08 2025-10-21 Digital Voice Systems, Inc. Tone frame detector for digital speech
US12462814B2 (en) 2023-10-06 2025-11-04 Digital Voice Systems, Inc. Bit error correction in digital speech

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443548A2 (en) * 1990-02-22 1991-08-28 Nec Corporation Speech coder
EP0545386A2 (en) * 1991-12-03 1993-06-09 Nec Corporation Method for speech coding and voice-coder
EP0573398A2 (en) * 1992-06-01 1993-12-08 Hughes Aircraft Company C.E.L.P. Vocoder
EP0607989A2 (en) * 1993-01-22 1994-07-27 Nec Corporation Voice coder system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443548A2 (en) * 1990-02-22 1991-08-28 Nec Corporation Speech coder
EP0545386A2 (en) * 1991-12-03 1993-06-09 Nec Corporation Method for speech coding and voice-coder
EP0573398A2 (en) * 1992-06-01 1993-12-08 Hughes Aircraft Company C.E.L.P. Vocoder
EP0607989A2 (en) * 1993-01-22 1994-07-27 Nec Corporation Voice coder system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8315860B2 (en) 2002-11-13 2012-11-20 Digital Voice Systems, Inc. Interoperable vocoder
US7957963B2 (en) 2003-01-30 2011-06-07 Digital Voice Systems, Inc. Voice transcoder

Also Published As

Publication number Publication date
EP0913034A2 (en) 1999-05-06
WO1998004046A2 (en) 1998-01-29
CA2258183A1 (en) 1998-01-29
AU3534597A (en) 1998-02-10

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