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GB2318025B - Speakerphone, speakerphone system and method of operating speakerphone - Google Patents

Speakerphone, speakerphone system and method of operating speakerphone

Info

Publication number
GB2318025B
GB2318025B GB9723211A GB9723211A GB2318025B GB 2318025 B GB2318025 B GB 2318025B GB 9723211 A GB9723211 A GB 9723211A GB 9723211 A GB9723211 A GB 9723211A GB 2318025 B GB2318025 B GB 2318025B
Authority
GB
United Kingdom
Prior art keywords
speakerphone
operating
speakerphone system
operating speakerphone
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
GB9723211A
Other versions
GB9723211D0 (en
GB2318025A (en
Inventor
Mark J Karnowski
Frank Sacca
Catherine Tsang
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.)
Casio Phonemate Inc
Original Assignee
Casio Phonemate 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 Casio Phonemate Inc filed Critical Casio Phonemate Inc
Priority claimed from GB9611308A external-priority patent/GB2301731B/en
Publication of GB9723211D0 publication Critical patent/GB9723211D0/en
Publication of GB2318025A publication Critical patent/GB2318025A/en
Application granted granted Critical
Publication of GB2318025B publication Critical patent/GB2318025B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
GB9723211A 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating speakerphone Expired - Fee Related GB2318025B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45468995A 1995-05-31 1995-05-31
GB9611308A GB2301731B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating a speakerphone

Publications (3)

Publication Number Publication Date
GB9723211D0 GB9723211D0 (en) 1998-01-07
GB2318025A GB2318025A (en) 1998-04-08
GB2318025B true GB2318025B (en) 1998-09-02

Family

ID=26309410

Family Applications (3)

Application Number Title Priority Date Filing Date
GB9723205A Expired - Fee Related GB2318023B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating a speakerphone
GB9723209A Expired - Fee Related GB2318024B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating a speakerphone
GB9723211A Expired - Fee Related GB2318025B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating speakerphone

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB9723205A Expired - Fee Related GB2318023B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating a speakerphone
GB9723209A Expired - Fee Related GB2318024B (en) 1995-05-31 1996-05-30 Speakerphone, speakerphone system and method of operating a speakerphone

Country Status (1)

Country Link
GB (3) GB2318023B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2330744B (en) 1997-10-24 2002-05-29 Mitel Corp Howling controller
KR20000062086A (en) * 1999-03-30 2000-10-25 윤종용 Method for displaying the transmission/receipt state ofvoice signal in case of the speaker-phone mode ina portable phone

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014294A (en) * 1990-02-01 1991-05-07 Motorola Inc. Speakerphone for cellular telephones with howl prevention, detection, elimination and determination
GB2278754A (en) * 1993-06-02 1994-12-07 Northern Telecom Ltd Telephone instrument
WO1996027971A1 (en) * 1995-03-03 1996-09-12 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones
GB8317706D0 (en) * 1983-06-29 1983-08-03 Standard Telephones Cables Ltd Telephone subsets
US4741018A (en) * 1987-04-24 1988-04-26 Motorola, Inc. Speakerphone using digitally compressed audio to control voice path gain
US5075687A (en) * 1990-09-27 1991-12-24 Advanced Micro Devices, Inc. Echo suppression with both digital and analog variable attenuators

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014294A (en) * 1990-02-01 1991-05-07 Motorola Inc. Speakerphone for cellular telephones with howl prevention, detection, elimination and determination
GB2278754A (en) * 1993-06-02 1994-12-07 Northern Telecom Ltd Telephone instrument
WO1996027971A1 (en) * 1995-03-03 1996-09-12 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats

Also Published As

Publication number Publication date
GB2318024B (en) 1998-09-02
GB9723211D0 (en) 1998-01-07
GB2318023B (en) 1998-09-02
GB2318025A (en) 1998-04-08
GB2318024A (en) 1998-04-08
GB2318023A (en) 1998-04-08
GB9723209D0 (en) 1998-01-07
GB9723205D0 (en) 1998-01-07

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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: 20050530