JPH04227341A - Echo canceller - Google Patents

Echo canceller

Info

Publication number
JPH04227341A
JPH04227341A JP9880991A JP9880991A JPH04227341A JP H04227341 A JPH04227341 A JP H04227341A JP 9880991 A JP9880991 A JP 9880991A JP 9880991 A JP9880991 A JP 9880991A JP H04227341 A JPH04227341 A JP H04227341A
Authority
JP
Japan
Prior art keywords
echo canceller
echo
signal
path
canceller
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.)
Pending
Application number
JP9880991A
Other languages
Japanese (ja)
Inventor
Hiromoto Furukawa
Satoru Ibaraki
Hiroyuki Naono
Original Assignee
Matsushita Electric Ind Co 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Priority to JP9880991A priority Critical patent/JPH04227341A/en
Publication of JPH04227341A publication Critical patent/JPH04227341A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To realize the echo canceller able to discriminate fluctuation in an echo path at a high speed in bi-directional simultaneous talking such as the tele-conference system.
CONSTITUTION: The echo canceller is provided with a 1st echo canceller 5 outputting a signal cancelling an echo signal included in a transmission signal, a 2nd echo canceller 6 always identifying the characteristic of the echo path and a bi-directional simultaneous talking means 11 to execute the identification of the echo path of the 1st echo canceller 5 when a reception signal is detected.
COPYRIGHT: (C)1992,JPO&Japio
JP9880991A 1991-04-30 1991-04-30 Echo canceller Pending JPH04227341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9880991A JPH04227341A (en) 1991-04-30 1991-04-30 Echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9880991A JPH04227341A (en) 1991-04-30 1991-04-30 Echo canceller

Publications (1)

Publication Number Publication Date
JPH04227341A true JPH04227341A (en) 1992-08-17

Family

ID=14229666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9880991A Pending JPH04227341A (en) 1991-04-30 1991-04-30 Echo canceller

Country Status (1)

Country Link
JP (1) JPH04227341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5463618A (en) * 1993-05-28 1995-10-31 Matsushita Electric Industrial Co., Ltd. Echo canceller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6235723A (en) * 1985-08-08 1987-02-16 Matsushita Electric Ind Co Ltd Echo canceling device
JPS62278825A (en) * 1986-05-28 1987-12-03 Matsushita Electric Ind Co Ltd Echo canceller control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6235723A (en) * 1985-08-08 1987-02-16 Matsushita Electric Ind Co Ltd Echo canceling device
JPS62278825A (en) * 1986-05-28 1987-12-03 Matsushita Electric Ind Co Ltd Echo canceller control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5463618A (en) * 1993-05-28 1995-10-31 Matsushita Electric Industrial Co., Ltd. Echo canceller

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