JPS6429132A - Echo canceller - Google Patents

Echo canceller

Info

Publication number
JPS6429132A
JPS6429132A JP18640887A JP18640887A JPS6429132A JP S6429132 A JPS6429132 A JP S6429132A JP 18640887 A JP18640887 A JP 18640887A JP 18640887 A JP18640887 A JP 18640887A JP S6429132 A JPS6429132 A JP S6429132A
Authority
JP
Japan
Prior art keywords
training
signal
coefficient calculation
tap coefficient
calculation system
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.)
Granted
Application number
JP18640887A
Other languages
Japanese (ja)
Other versions
JP2585279B2 (en
Inventor
Hiroshi Oikawa
Shoji Makino
Shigenobu Minami
Takashi Saeki
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.)
Toshiba Corp
NTT Inc
Original Assignee
Toshiba Corp
Nippon Telegraph and Telephone Corp
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 Toshiba Corp, Nippon Telegraph and Telephone Corp filed Critical Toshiba Corp
Priority to JP62186408A priority Critical patent/JP2585279B2/en
Publication of JPS6429132A publication Critical patent/JPS6429132A/en
Application granted granted Critical
Publication of JP2585279B2 publication Critical patent/JP2585279B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Circuit For Audible Band Transducer (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To reduce the time to be converged finally, to freely set a training time and to set a short arithmetic word length by providing a pseudo echo signal generating means and using the sequential tap coefficient calculation system and the batch tap coefficient calculation system in common at the training so as to estimate the echo path characteristic. CONSTITUTION:The output means outputting a reception signal to an eacho path is provided with a transmission signal output means outputting an audible tone as a transmission signal, a pseudo echo signal generating means 6 estimating the echo path characteristic between the output means and the transmission signal output means so as to generate a pseudo echo signal, a subtraction means 7 subtracting the pseudo echo signal from the transmission signal and a training signal source generating a training signal, and the pseudo echo signal generating means 6 uses the sequential tap coefficient calculation system and the batch tap coefficient calculation system in common at the training to estimate the echo path characteristic. Thus, the training time is set freely and the arithmetic word length is set short and the time to be converged finally is reduced.
JP62186408A 1987-07-24 1987-07-24 Eco-Cancer Expired - Lifetime JP2585279B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62186408A JP2585279B2 (en) 1987-07-24 1987-07-24 Eco-Cancer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62186408A JP2585279B2 (en) 1987-07-24 1987-07-24 Eco-Cancer

Publications (2)

Publication Number Publication Date
JPS6429132A true JPS6429132A (en) 1989-01-31
JP2585279B2 JP2585279B2 (en) 1997-02-26

Family

ID=16187892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62186408A Expired - Lifetime JP2585279B2 (en) 1987-07-24 1987-07-24 Eco-Cancer

Country Status (1)

Country Link
JP (1) JP2585279B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05315993A (en) * 1991-08-31 1993-11-26 Koichi Mino Communication system having speaker to be used as microphone in common
JP2007126191A (en) * 2005-11-04 2007-05-24 Toyo Seikan Kaisha Ltd Splash preventing method for positive pressure beverage container and can lid therefor
JP2009232436A (en) * 2008-03-24 2009-10-08 Matech Inc Single transducer full duplex talking circuit and audio circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206433A (en) * 1982-05-27 1983-12-01 Komatsu Ltd Hoist interlock device for trolley-assist dump truck

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58206433A (en) * 1982-05-27 1983-12-01 Komatsu Ltd Hoist interlock device for trolley-assist dump truck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05315993A (en) * 1991-08-31 1993-11-26 Koichi Mino Communication system having speaker to be used as microphone in common
JP2007126191A (en) * 2005-11-04 2007-05-24 Toyo Seikan Kaisha Ltd Splash preventing method for positive pressure beverage container and can lid therefor
JP2009232436A (en) * 2008-03-24 2009-10-08 Matech Inc Single transducer full duplex talking circuit and audio circuit

Also Published As

Publication number Publication date
JP2585279B2 (en) 1997-02-26

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Legal Events

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