GB2246688B - Improvements in and relating to communications systems - Google Patents

Improvements in and relating to communications systems

Info

Publication number
GB2246688B
GB2246688B GB9109889A GB9109889A GB2246688B GB 2246688 B GB2246688 B GB 2246688B GB 9109889 A GB9109889 A GB 9109889A GB 9109889 A GB9109889 A GB 9109889A GB 2246688 B GB2246688 B GB 2246688B
Authority
GB
United Kingdom
Prior art keywords
relating
communications systems
communications
systems
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 - Fee Related
Application number
GB9109889A
Other versions
GB2246688A (en
GB9109889D0 (en
Inventor
Peter Leighton Smith
Donald Lewis Macdonald
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.)
Racal Acoustics Ltd
Original Assignee
Racal Acoustics 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 Racal Acoustics Ltd filed Critical Racal Acoustics Ltd
Publication of GB9109889D0 publication Critical patent/GB9109889D0/en
Publication of GB2246688A publication Critical patent/GB2246688A/en
Application granted granted Critical
Publication of GB2246688B publication Critical patent/GB2246688B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit For Audible Band Transducer (AREA)
GB9109889A 1990-05-25 1991-05-08 Improvements in and relating to communications systems Expired - Fee Related GB2246688B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9011782A GB9011782D0 (en) 1990-05-25 1990-05-25 Improvements in and relating to communications systems

Publications (3)

Publication Number Publication Date
GB9109889D0 GB9109889D0 (en) 1991-07-03
GB2246688A GB2246688A (en) 1992-02-05
GB2246688B true GB2246688B (en) 1994-07-13

Family

ID=10676589

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9011782A Pending GB9011782D0 (en) 1990-05-25 1990-05-25 Improvements in and relating to communications systems
GB9109889A Expired - Fee Related GB2246688B (en) 1990-05-25 1991-05-08 Improvements in and relating to communications systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9011782A Pending GB9011782D0 (en) 1990-05-25 1990-05-25 Improvements in and relating to communications systems

Country Status (1)

Country Link
GB (2) GB9011782D0 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2518765B2 (en) * 1991-05-31 1996-07-31 国際電気株式会社 Speech coding communication system and device thereof
JPH09326844A (en) * 1996-06-03 1997-12-16 Mitsubishi Electric Corp Noise reduction speech device and noise reduction speech method
EP1238859B1 (en) * 2000-08-07 2008-10-15 Mitsubishi Denki Kabushiki Kaisha Automotive audiovisual system
JP4567804B1 (en) * 2009-11-30 2010-10-20 パナソニック株式会社 Howling suppression device, microphone device, amplifier device, loudspeaker system, and howling suppression method
US9208772B2 (en) 2011-12-23 2015-12-08 Bose Corporation Communications headset speech-based gain control
US9208773B2 (en) * 2011-12-23 2015-12-08 Bose Corporation Headset noise-based pulsed attenuation
CN106686249B (en) * 2017-01-17 2020-04-24 维沃移动通信有限公司 Voice communication method and mobile terminal
CN115116232B (en) * 2022-08-29 2022-12-09 深圳市微纳感知计算技术有限公司 Voiceprint comparison method, device and equipment for automobile whistling and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101458A (en) * 1981-06-15 1983-01-12 Israel Electronics Corp Squelch circuitry for receivers
EP0123349A1 (en) * 1983-04-20 1984-10-31 Philips Electronics Uk Limited Apparatus for distinguishing between speech and certain other signals

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101458A (en) * 1981-06-15 1983-01-12 Israel Electronics Corp Squelch circuitry for receivers
EP0123349A1 (en) * 1983-04-20 1984-10-31 Philips Electronics Uk Limited Apparatus for distinguishing between speech and certain other signals

Also Published As

Publication number Publication date
GB9011782D0 (en) 1990-07-18
GB2246688A (en) 1992-02-05
GB9109889D0 (en) 1991-07-03

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100508