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JPS6429094A - Echo erasing device - Google Patents

Echo erasing device

Info

Publication number
JPS6429094A
JPS6429094A JP18361187A JP18361187A JPS6429094A JP S6429094 A JPS6429094 A JP S6429094A JP 18361187 A JP18361187 A JP 18361187A JP 18361187 A JP18361187 A JP 18361187A JP S6429094 A JPS6429094 A JP S6429094A
Authority
JP
Japan
Prior art keywords
echo
pass
echo signal
canceler circuit
low
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
JP18361187A
Other languages
Japanese (ja)
Other versions
JP2542625B2 (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
Nippon Telegraph and Telephone Corp
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 JP62183611A priority Critical patent/JP2542625B2/en
Publication of JPS6429094A publication Critical patent/JPS6429094A/en
Application granted granted Critical
Publication of JP2542625B2 publication Critical patent/JP2542625B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Circuit For Audible Band Transducer (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To effectively cancel an echo signal by assuming the reverberation time of a echo path from echo path characteristic assumed at each frequency band and variably setting a tap length in order to generate a pseudo echo signal in accordance with it. CONSTITUTION:A speaker 1 and a microphone 2 are acoustically coupled. An input sound signal is separated by low-pass filters 11 and 21 and high-pass filters 12 and 22, the signals of respective frequency bands are sampled by frequency converting circuits 13, 23, 14 and 24, and the signals are supplied for the generation of the pseudo echo signal by an echo canceler circuit 3 for a low-pass and an echo canceler circuit 4 for a high-pass. The pseudo echo signal generated at the echo canceler circuit 3 for the low-pass and the echo canceler circuit 4 for the high-pass is supplied for the canceling processing of the echo signal at subtracters 5 and 6.
JP62183611A 1987-07-24 1987-07-24 Echo canceller Expired - Fee Related JP2542625B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62183611A JP2542625B2 (en) 1987-07-24 1987-07-24 Echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62183611A JP2542625B2 (en) 1987-07-24 1987-07-24 Echo canceller

Publications (2)

Publication Number Publication Date
JPS6429094A true JPS6429094A (en) 1989-01-31
JP2542625B2 JP2542625B2 (en) 1996-10-09

Family

ID=16138820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62183611A Expired - Fee Related JP2542625B2 (en) 1987-07-24 1987-07-24 Echo canceller

Country Status (1)

Country Link
JP (1) JP2542625B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03143035A (en) * 1989-08-07 1991-06-18 American Teleph & Telegr Co <Att> Echo cancellor and echo cancelling method
JPH04123621A (en) * 1990-09-14 1992-04-23 Nippon Telegr & Teleph Corp <Ntt> Echo eraser
FR2678453A1 (en) * 1991-06-27 1992-12-31 Alcatel Business Systems Telephone instrument with echo-cancellation device
JPH0555961A (en) * 1991-08-27 1993-03-05 Aiphone Co Ltd Loud-speaker simultaneous speech system using frequency division
JP2008288718A (en) * 2007-05-15 2008-11-27 Yamaha Corp Sound echo canceler
JP2011232691A (en) * 2010-04-30 2011-11-17 Honda Motor Co Ltd Dereverberation device and dereverberation method
WO2015159901A1 (en) * 2014-04-14 2015-10-22 ヤマハ株式会社 Sound emission and collection device, and sound emission and collection method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163424A (en) * 1986-01-13 1987-07-20 Nec Corp Acoustic echo canceller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163424A (en) * 1986-01-13 1987-07-20 Nec Corp Acoustic echo canceller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03143035A (en) * 1989-08-07 1991-06-18 American Teleph & Telegr Co <Att> Echo cancellor and echo cancelling method
JPH04123621A (en) * 1990-09-14 1992-04-23 Nippon Telegr & Teleph Corp <Ntt> Echo eraser
FR2678453A1 (en) * 1991-06-27 1992-12-31 Alcatel Business Systems Telephone instrument with echo-cancellation device
JPH0555961A (en) * 1991-08-27 1993-03-05 Aiphone Co Ltd Loud-speaker simultaneous speech system using frequency division
JP2008288718A (en) * 2007-05-15 2008-11-27 Yamaha Corp Sound echo canceler
JP2011232691A (en) * 2010-04-30 2011-11-17 Honda Motor Co Ltd Dereverberation device and dereverberation method
US9002024B2 (en) 2010-04-30 2015-04-07 Honda Motor Co., Ltd. Reverberation suppressing apparatus and reverberation suppressing method
WO2015159901A1 (en) * 2014-04-14 2015-10-22 ヤマハ株式会社 Sound emission and collection device, and sound emission and collection method
JP2015204535A (en) * 2014-04-14 2015-11-16 ヤマハ株式会社 Sound emission and collection device
US9807215B2 (en) 2014-04-14 2017-10-31 Yamaha Corporation Sound emission and collection device, and sound emission and collection method
US10038769B2 (en) 2014-04-14 2018-07-31 Yamaha Corporation Sound emission and collection device, and sound emission and collection method

Also Published As

Publication number Publication date
JP2542625B2 (en) 1996-10-09

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees