WO2010077835A3 - Acoustic suppression using ancillary rf link - Google Patents

Acoustic suppression using ancillary rf link Download PDF

Info

Publication number
WO2010077835A3
WO2010077835A3 PCT/US2009/067954 US2009067954W WO2010077835A3 WO 2010077835 A3 WO2010077835 A3 WO 2010077835A3 US 2009067954 W US2009067954 W US 2009067954W WO 2010077835 A3 WO2010077835 A3 WO 2010077835A3
Authority
WO
WIPO (PCT)
Prior art keywords
link
ancillary
transmitter
receiver
gain
Prior art date
Application number
PCT/US2009/067954
Other languages
French (fr)
Other versions
WO2010077835A2 (en
Inventor
Nereydo T. Contreras
William R. Williams
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 AU2009333367A priority Critical patent/AU2009333367B2/en
Priority to CN200980150904.XA priority patent/CN102257750B/en
Priority to CA2746135A priority patent/CA2746135C/en
Publication of WO2010077835A2 publication Critical patent/WO2010077835A2/en
Publication of WO2010077835A3 publication Critical patent/WO2010077835A3/en

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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6016—Substation equipment, e.g. for use by subscribers including speech amplifiers in the receiver circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
    • H04M1/72412—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories using two-way short-range wireless interfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/02—Details of telephonic subscriber devices including a Bluetooth interface

Abstract

Methods and systems are described in which the feedback between a transmitter and collocated receiver is reduced so that the overall feedback loop gain is less than 0dB. Audio is transmitted from the transmitter to the receiver through a primary RF link while RSSI or TOA information to determine the separation between the end devices is exchanged using an ancillary RF link. The total loop gain is calculated using the gain of each end device and the separation. If the distance is less than a threshold distance, the gain of one or more components in the transmitter and/or receiver is reduced.
PCT/US2009/067954 2008-12-17 2009-12-15 Acoustic suppression using ancillary rf link WO2010077835A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2009333367A AU2009333367B2 (en) 2008-12-17 2009-12-15 Acoustic suppression using ancillary RF link
CN200980150904.XA CN102257750B (en) 2008-12-17 2009-12-15 Acoustic suppression using ancillary RF link
CA2746135A CA2746135C (en) 2008-12-17 2009-12-15 Acoustic suppression using ancillary rf link

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/337,191 2008-12-17
US12/337,191 US8027640B2 (en) 2008-12-17 2008-12-17 Acoustic suppression using ancillary RF link

Publications (2)

Publication Number Publication Date
WO2010077835A2 WO2010077835A2 (en) 2010-07-08
WO2010077835A3 true WO2010077835A3 (en) 2010-10-14

Family

ID=42241100

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/067954 WO2010077835A2 (en) 2008-12-17 2009-12-15 Acoustic suppression using ancillary rf link

Country Status (5)

Country Link
US (1) US8027640B2 (en)
CN (1) CN102257750B (en)
AU (1) AU2009333367B2 (en)
CA (1) CA2746135C (en)
WO (1) WO2010077835A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2490092B (en) 2011-02-16 2018-04-11 Skype Processing audio signals
US8718562B2 (en) * 2011-05-20 2014-05-06 Skype Processing audio signals
US9641933B2 (en) * 2012-06-18 2017-05-02 Jacob G. Appelbaum Wired and wireless microphone arrays
US9154904B2 (en) 2012-11-12 2015-10-06 Tata Consultancy Services Limited Method and system for accurate straight line distance estimation between two communication devices
EP2736178A1 (en) * 2012-11-27 2014-05-28 ST-Ericsson SA NFC reader transmission signal pre-distortion
WO2015190940A1 (en) 2014-06-12 2015-12-17 Motorola Solutions, Inc. Methods and systems for automatic creation of talkgroups based on received signal strength indicator (rssi)
US10111054B2 (en) * 2014-09-30 2018-10-23 Symbol Technologies, Llc Apparatus and method for performing feedback reduction
US9667284B1 (en) 2016-03-08 2017-05-30 Motorola Solutions, Inc. Method, device, and system for identifying a howling source and suppressing howling
WO2017210856A1 (en) * 2016-06-07 2017-12-14 海能达通信股份有限公司 Method of controlling audio output, user terminal, and radio terminal
EP3528590B1 (en) * 2016-10-31 2021-09-22 Huawei Technologies Co., Ltd. Audio processing method and terminal device
CN109963226A (en) * 2017-12-14 2019-07-02 群光电子股份有限公司 Audio transmission system, the method for sound adjust automatically and its software program product
US10154149B1 (en) * 2018-03-15 2018-12-11 Motorola Solutions, Inc. Audio framework extension for acoustic feedback suppression

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357609A (en) * 1992-03-25 1994-10-18 One Touch Systems, Inc. Site controller with echo suppression
WO1998005135A1 (en) * 1996-07-26 1998-02-05 Shure Brothers Incorporated Acoustic feedback elimination using adaptive notch filter algorithm
US6741874B1 (en) * 2000-04-18 2004-05-25 Motorola, Inc. Method and apparatus for reducing echo feedback in a communication system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7072476B2 (en) * 1997-02-18 2006-07-04 Matech, Inc. Audio headset
KR100709522B1 (en) * 1997-10-13 2007-04-20 퀄컴 인코포레이티드 Apparatus and method for optimized power control
SE518418C2 (en) 2000-12-28 2002-10-08 Ericsson Telefon Ab L M Sound-based proximity detector
US6888811B2 (en) 2001-09-24 2005-05-03 Motorola, Inc. Communication system for location sensitive information and method therefor
US7072679B2 (en) * 2002-06-28 2006-07-04 Harris Corporation Automatic transmit power control disabling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357609A (en) * 1992-03-25 1994-10-18 One Touch Systems, Inc. Site controller with echo suppression
WO1998005135A1 (en) * 1996-07-26 1998-02-05 Shure Brothers Incorporated Acoustic feedback elimination using adaptive notch filter algorithm
US6741874B1 (en) * 2000-04-18 2004-05-25 Motorola, Inc. Method and apparatus for reducing echo feedback in a communication system

Also Published As

Publication number Publication date
AU2009333367B2 (en) 2013-08-01
CA2746135C (en) 2015-01-27
AU2009333367A1 (en) 2011-06-30
CN102257750A (en) 2011-11-23
CA2746135A1 (en) 2010-07-08
US8027640B2 (en) 2011-09-27
WO2010077835A2 (en) 2010-07-08
CN102257750B (en) 2014-12-10
US20100151787A1 (en) 2010-06-17

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