GB2369001A - Suppression of residual acoustic echo - Google Patents

Suppression of residual acoustic echo

Info

Publication number
GB2369001A
GB2369001A GB0203162A GB0203162A GB2369001A GB 2369001 A GB2369001 A GB 2369001A GB 0203162 A GB0203162 A GB 0203162A GB 0203162 A GB0203162 A GB 0203162A GB 2369001 A GB2369001 A GB 2369001A
Authority
GB
United Kingdom
Prior art keywords
echo
residual
significant amount
suppression
acoustic echo
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.)
Withdrawn
Application number
GB0203162A
Other versions
GB0203162D0 (en
Inventor
Adoram Erell
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.)
DSPC Technologies Ltd
Original Assignee
DSPC Technologies Ltd
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 DSPC Technologies Ltd filed Critical DSPC Technologies Ltd
Publication of GB0203162D0 publication Critical patent/GB0203162D0/en
Publication of GB2369001A publication Critical patent/GB2369001A/en
Withdrawn legal-status Critical Current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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

A communication device having residual echo suppression includes an echo canceller (22) and a residual echo system (50, 52). The echo canceller cancels (30) most of an echo of a far end signal found in a microphone signal and provides an echo canceled signal with a residual echo therein. The residual echo system suppresses (60) the residual echo when the echo canceller cancels a significant amount of echo. The residual echo system can either transmit (42) comfort noise or can transmit (38) the echo canceled signal at a low rate when the echo canceller cancels a significant amount of echo. If the former, the comfort noise parameters are updated (40) from background noise but not when the echo canceller cancels a significant amount of echo.
GB0203162A 1999-09-07 2000-09-04 Suppression of residual acoustic echo Withdrawn GB2369001A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39069799A 1999-09-07 1999-09-07
PCT/IL2000/000527 WO2001019062A1 (en) 1999-09-07 2000-09-04 Suppression of residual acoustic echo

Publications (2)

Publication Number Publication Date
GB0203162D0 GB0203162D0 (en) 2002-03-27
GB2369001A true GB2369001A (en) 2002-05-15

Family

ID=23543548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0203162A Withdrawn GB2369001A (en) 1999-09-07 2000-09-04 Suppression of residual acoustic echo

Country Status (4)

Country Link
AU (1) AU6862200A (en)
DE (1) DE10084970T1 (en)
GB (1) GB2369001A (en)
WO (1) WO2001019062A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7027591B2 (en) * 2002-10-16 2006-04-11 Ericsson Inc. Integrated noise cancellation and residual echo suppression
CN101046965B (en) * 2006-03-27 2010-05-12 华为技术有限公司 Method for generating comfortable noise in echo removing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016271A (en) * 1989-05-30 1991-05-14 At&T Bell Laboratories Echo canceler-suppressor speakerphone
US5283784A (en) * 1990-08-03 1994-02-01 Coherent Communications Systems Echo canceller processing techniques and processing
US5646991A (en) * 1992-09-25 1997-07-08 Qualcomm Incorporated Noise replacement system and method in an echo canceller
US5835486A (en) * 1996-07-11 1998-11-10 Dsc/Celcore, Inc. Multi-channel transcoder rate adapter having low delay and integral echo cancellation
US5937060A (en) * 1996-02-09 1999-08-10 Texas Instruments Incorporated Residual echo suppression
US6052462A (en) * 1997-07-10 2000-04-18 Tellabs Operations, Inc. Double talk detection and echo control circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016271A (en) * 1989-05-30 1991-05-14 At&T Bell Laboratories Echo canceler-suppressor speakerphone
US5283784A (en) * 1990-08-03 1994-02-01 Coherent Communications Systems Echo canceller processing techniques and processing
US5646991A (en) * 1992-09-25 1997-07-08 Qualcomm Incorporated Noise replacement system and method in an echo canceller
US5937060A (en) * 1996-02-09 1999-08-10 Texas Instruments Incorporated Residual echo suppression
US5835486A (en) * 1996-07-11 1998-11-10 Dsc/Celcore, Inc. Multi-channel transcoder rate adapter having low delay and integral echo cancellation
US6052462A (en) * 1997-07-10 2000-04-18 Tellabs Operations, Inc. Double talk detection and echo control circuit

Also Published As

Publication number Publication date
AU6862200A (en) 2001-04-10
GB0203162D0 (en) 2002-03-27
DE10084970T1 (en) 2002-11-21
WO2001019062A1 (en) 2001-03-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)