DE69518174T2 - Rauschkorrektur durch Feststellung der Anwesenheit von Sprachsignalen - Google Patents

Rauschkorrektur durch Feststellung der Anwesenheit von Sprachsignalen

Info

Publication number
DE69518174T2
DE69518174T2 DE69518174T DE69518174T DE69518174T2 DE 69518174 T2 DE69518174 T2 DE 69518174T2 DE 69518174 T DE69518174 T DE 69518174T DE 69518174 T DE69518174 T DE 69518174T DE 69518174 T2 DE69518174 T2 DE 69518174T2
Authority
DE
Germany
Prior art keywords
determining
speech signals
noise correction
correction
noise
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.)
Expired - Lifetime
Application number
DE69518174T
Other languages
English (en)
Other versions
DE69518174D1 (de
Inventor
Thomas John Janiszewski
Michael Charles Recchione
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Publication of DE69518174D1 publication Critical patent/DE69518174D1/de
Application granted granted Critical
Publication of DE69518174T2 publication Critical patent/DE69518174T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • 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
    • G10L19/135—Vector sum excited linear prediction [VSELP]
    • 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
    • G10L21/0208—Noise 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
    • G10L25/78—Detection of presence or absence of voice signals
    • 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
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02168—Noise filtering characterised by the method used for estimating noise the estimation exclusively taking place during speech pauses
    • 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
    • G10L25/78—Detection of presence or absence of voice signals
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision
    • G10L2025/786—Adaptive threshold
DE69518174T 1994-01-28 1995-01-18 Rauschkorrektur durch Feststellung der Anwesenheit von Sprachsignalen Expired - Lifetime DE69518174T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/188,294 US5657422A (en) 1994-01-28 1994-01-28 Voice activity detection driven noise remediator

Publications (2)

Publication Number Publication Date
DE69518174D1 DE69518174D1 (de) 2000-09-07
DE69518174T2 true DE69518174T2 (de) 2001-05-31

Family

ID=22692567

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69533734T Expired - Lifetime DE69533734T2 (de) 1994-01-28 1995-01-18 Durch Sprachaktivitätsdetektion gesteuerte Rauschunterdrückung
DE69518174T Expired - Lifetime DE69518174T2 (de) 1994-01-28 1995-01-18 Rauschkorrektur durch Feststellung der Anwesenheit von Sprachsignalen

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE69533734T Expired - Lifetime DE69533734T2 (de) 1994-01-28 1995-01-18 Durch Sprachaktivitätsdetektion gesteuerte Rauschunterdrückung

Country Status (7)

Country Link
US (1) US5657422A (de)
EP (2) EP0665530B1 (de)
KR (1) KR100367533B1 (de)
CN (1) CN1132988A (de)
CA (1) CA2138818C (de)
DE (2) DE69533734T2 (de)
RU (1) RU2151430C1 (de)

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Also Published As

Publication number Publication date
KR950035167A (ko) 1995-12-30
EP1017042B1 (de) 2004-11-03
DE69518174D1 (de) 2000-09-07
US5657422A (en) 1997-08-12
EP0665530B1 (de) 2000-08-02
EP0665530A1 (de) 1995-08-02
CA2138818A1 (en) 1995-07-29
CN1132988A (zh) 1996-10-09
RU2151430C1 (ru) 2000-06-20
CA2138818C (en) 1999-05-11
DE69533734T2 (de) 2005-11-03
DE69533734D1 (de) 2004-12-09
RU95101029A (ru) 1996-11-10
EP1017042A1 (de) 2000-07-05
KR100367533B1 (ko) 2003-04-07

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