DE69827731D1 - Anordnung zur aktiven unterdrückung von akustischem Echo und Geräusch - Google Patents

Anordnung zur aktiven unterdrückung von akustischem Echo und Geräusch

Info

Publication number
DE69827731D1
DE69827731D1 DE69827731T DE69827731T DE69827731D1 DE 69827731 D1 DE69827731 D1 DE 69827731D1 DE 69827731 T DE69827731 T DE 69827731T DE 69827731 T DE69827731 T DE 69827731T DE 69827731 D1 DE69827731 D1 DE 69827731D1
Authority
DE
Germany
Prior art keywords
noise
arrangement
acoustic echo
active suppression
suppression
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
DE69827731T
Other languages
English (en)
Other versions
DE69827731T2 (de
Inventor
Brian M Finn
Thomas O Roe
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.)
Digisonix Inc
Original Assignee
Digisonix Inc
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 Digisonix Inc filed Critical Digisonix Inc
Publication of DE69827731D1 publication Critical patent/DE69827731D1/de
Application granted granted Critical
Publication of DE69827731T2 publication Critical patent/DE69827731T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • 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
    • G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
    • 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
    • G10L2021/02087—Noise filtering the noise being separate speech, e.g. cocktail party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
DE69827731T 1997-09-11 1998-09-09 Anordnung zur aktiven Unterdrückung von akustischem Echo und Geräusch Expired - Lifetime DE69827731T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/927,874 US6496581B1 (en) 1997-09-11 1997-09-11 Coupled acoustic echo cancellation system
US927874 1997-09-11

Publications (2)

Publication Number Publication Date
DE69827731D1 true DE69827731D1 (de) 2004-12-30
DE69827731T2 DE69827731T2 (de) 2005-12-15

Family

ID=25455389

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69827731T Expired - Lifetime DE69827731T2 (de) 1997-09-11 1998-09-09 Anordnung zur aktiven Unterdrückung von akustischem Echo und Geräusch

Country Status (4)

Country Link
US (1) US6496581B1 (de)
EP (1) EP0903726B1 (de)
CA (1) CA2242510A1 (de)
DE (1) DE69827731T2 (de)

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Also Published As

Publication number Publication date
EP0903726B1 (de) 2004-11-24
US6496581B1 (en) 2002-12-17
EP0903726A2 (de) 1999-03-24
DE69827731T2 (de) 2005-12-15
EP0903726A3 (de) 1999-07-21
CA2242510A1 (en) 1999-03-11

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