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GB2466454B - Method and system for reducing howling in a half-duplex communication system - Google Patents

Method and system for reducing howling in a half-duplex communication system

Info

Publication number
GB2466454B
GB2466454B GB0823150A GB0823150A GB2466454B GB 2466454 B GB2466454 B GB 2466454B GB 0823150 A GB0823150 A GB 0823150A GB 0823150 A GB0823150 A GB 0823150A GB 2466454 B GB2466454 B GB 2466454B
Authority
GB
United Kingdom
Prior art keywords
duplex communication
communication system
reducing howling
howling
reducing
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.)
Active
Application number
GB0823150A
Other versions
GB2466454A (en
GB0823150D0 (en
Inventor
Nissim Gean
Itzhak Avayu
Avishai Yacobi
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Priority to GB0823150A priority Critical patent/GB2466454B/en
Publication of GB0823150D0 publication Critical patent/GB0823150D0/en
Priority to PCT/US2009/067957 priority patent/WO2010080374A2/en
Publication of GB2466454A publication Critical patent/GB2466454A/en
Application granted granted Critical
Publication of GB2466454B publication Critical patent/GB2466454B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Telephone Function (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Transceivers (AREA)
GB0823150A 2008-12-18 2008-12-18 Method and system for reducing howling in a half-duplex communication system Active GB2466454B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0823150A GB2466454B (en) 2008-12-18 2008-12-18 Method and system for reducing howling in a half-duplex communication system
PCT/US2009/067957 WO2010080374A2 (en) 2008-12-18 2009-12-15 Method and system for reducing howling in a half-duplex communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0823150A GB2466454B (en) 2008-12-18 2008-12-18 Method and system for reducing howling in a half-duplex communication system

Publications (3)

Publication Number Publication Date
GB0823150D0 GB0823150D0 (en) 2009-01-28
GB2466454A GB2466454A (en) 2010-06-23
GB2466454B true GB2466454B (en) 2011-04-13

Family

ID=40343864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0823150A Active GB2466454B (en) 2008-12-18 2008-12-18 Method and system for reducing howling in a half-duplex communication system

Country Status (2)

Country Link
GB (1) GB2466454B (en)
WO (1) WO2010080374A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477156A (en) * 2010-01-25 2011-07-27 Iml Ltd Reducing feedback between adjacent handsets in a communication system
US9667284B1 (en) 2016-03-08 2017-05-30 Motorola Solutions, Inc. Method, device, and system for identifying a howling source and suppressing howling
US10284728B1 (en) * 2018-02-21 2019-05-07 Motorola Solutions, Inc. Adaptive proximity thresholds for dynamic howling suppression
CN108806710B (en) * 2018-06-15 2020-07-24 会听声学科技（北京）有限公司 Voice enhancement gain adjustment method, system and earphone
US10530936B1 (en) 2019-03-15 2020-01-07 Motorola Solutions, Inc. Method and system for acoustic feedback cancellation using a known full band sequence

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0846679A (en) * 1994-07-29 1996-02-16 Victor Co Of Japan Ltd Cordless telephone set
US5575002A (en) * 1994-10-31 1996-11-12 Motorola, Inc. Method for muting a radio
GB2342011A (en) * 1998-07-31 2000-03-29 Motorola Inc Providing speakerphone operation in a portable communication device
GB2350969A (en) * 1999-06-07 2000-12-13 Ericsson Telefon Ab L M Loudspeaker volume range control for hands free telephone
US6952471B1 (en) * 2000-06-09 2005-10-04 Agere Systems Inc. Handset proximity muting

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010570A (en) * 1990-02-20 1991-04-23 Motorola, Inc. Method for active feedback suppression
US7092513B1 (en) * 2004-07-01 2006-08-15 Plantronics, Inc. Limiting maximum gain in duplex communications devices including telephone sets
KR20060057262A (en) * 2004-11-23 2006-05-26 삼성전자주식회사 Howling prevention method and device in mobile terminal
KR101113861B1 (en) * 2005-02-28 2012-02-29 엘지전자 주식회사 apparatus and method for transmission of PTT terminal which reduce howling effect

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0846679A (en) * 1994-07-29 1996-02-16 Victor Co Of Japan Ltd Cordless telephone set
US5575002A (en) * 1994-10-31 1996-11-12 Motorola, Inc. Method for muting a radio
GB2342011A (en) * 1998-07-31 2000-03-29 Motorola Inc Providing speakerphone operation in a portable communication device
GB2350969A (en) * 1999-06-07 2000-12-13 Ericsson Telefon Ab L M Loudspeaker volume range control for hands free telephone
US6952471B1 (en) * 2000-06-09 2005-10-04 Agere Systems Inc. Handset proximity muting

Also Published As

Publication number Publication date
WO2010080374A3 (en) 2010-10-07
WO2010080374A2 (en) 2010-07-15
GB2466454A (en) 2010-06-23
GB0823150D0 (en) 2009-01-28

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