WO2007106638A3 - Speech communication unit integrated circuit and method therefor - Google Patents

Speech communication unit integrated circuit and method therefor Download PDF

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Publication number
WO2007106638A3
WO2007106638A3 PCT/US2007/062277 US2007062277W WO2007106638A3 WO 2007106638 A3 WO2007106638 A3 WO 2007106638A3 US 2007062277 W US2007062277 W US 2007062277W WO 2007106638 A3 WO2007106638 A3 WO 2007106638A3
Authority
WO
WIPO (PCT)
Prior art keywords
speech
ltp
logic
communication unit
integrated circuit
Prior art date
Application number
PCT/US2007/062277
Other languages
French (fr)
Other versions
WO2007106638A2 (en
Inventor
Jonathan Gibbs
Halil Fikretler
Original Assignee
Motorola Inc
Jonathan Gibbs
Halil Fikretler
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 Motorola Inc, Jonathan Gibbs, Halil Fikretler filed Critical Motorola Inc
Publication of WO2007106638A2 publication Critical patent/WO2007106638A2/en
Publication of WO2007106638A3 publication Critical patent/WO2007106638A3/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
    • G10L19/04—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible

Abstract

A speech communication unit (100) comprises a speech encoder (134) capable of representing an input speech signal. The speech encoder (134) comprises long-term prediction (LTP) logic having memory (215) operably coupled to quantization logic, wherein the quantization logic is arranged to quantize a memory state of the LTP logic. On the decoder side, a first speech decoder (260) receives the speech encoded bitstream and has a conventional long term predictor (LTP) memory element (265) that is driven by one or more previous codebook decisions made by the speech encoder. A second decoder (275) also receives the speech encoded bitstream and has an LTP memory element (280) that is updated by quantized values of a memory state of an LTP logic of the speech encoder.
PCT/US2007/062277 2006-03-14 2007-02-16 Speech communication unit integrated circuit and method therefor WO2007106638A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0605041.3 2006-03-14
GB0605041A GB2436192B (en) 2006-03-14 2006-03-14 Speech communication unit integrated circuit and method therefor

Publications (2)

Publication Number Publication Date
WO2007106638A2 WO2007106638A2 (en) 2007-09-20
WO2007106638A3 true WO2007106638A3 (en) 2008-04-24

Family

ID=36241533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/062277 WO2007106638A2 (en) 2006-03-14 2007-02-16 Speech communication unit integrated circuit and method therefor

Country Status (2)

Country Link
GB (1) GB2436192B (en)
WO (1) WO2007106638A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2474297B (en) * 2009-10-12 2017-02-01 Bitea Ltd Voice Quality Determination

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020007269A1 (en) * 1998-08-24 2002-01-17 Yang Gao Codebook structure and search for speech coding
US20030055633A1 (en) * 2001-06-21 2003-03-20 Heikkinen Ari P. Method and device for coding speech in analysis-by-synthesis speech coders
US6691082B1 (en) * 1999-08-03 2004-02-10 Lucent Technologies Inc Method and system for sub-band hybrid coding
US20050228651A1 (en) * 2004-03-31 2005-10-13 Microsoft Corporation. Robust real-time speech codec

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08272395A (en) * 1995-03-31 1996-10-18 Nec Corp Voice encoding device
FI114248B (en) * 1997-03-14 2004-09-15 Nokia Corp Method and apparatus for audio coding and audio decoding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020007269A1 (en) * 1998-08-24 2002-01-17 Yang Gao Codebook structure and search for speech coding
US6691082B1 (en) * 1999-08-03 2004-02-10 Lucent Technologies Inc Method and system for sub-band hybrid coding
US20030055633A1 (en) * 2001-06-21 2003-03-20 Heikkinen Ari P. Method and device for coding speech in analysis-by-synthesis speech coders
US20050228651A1 (en) * 2004-03-31 2005-10-13 Microsoft Corporation. Robust real-time speech codec

Also Published As

Publication number Publication date
GB0605041D0 (en) 2006-04-19
GB2436192B (en) 2008-03-05
GB2436192A (en) 2007-09-19
WO2007106638A2 (en) 2007-09-20

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