JPS6420735A - Echo canceller - Google Patents

Echo canceller

Info

Publication number
JPS6420735A
JPS6420735A JP17742387A JP17742387A JPS6420735A JP S6420735 A JPS6420735 A JP S6420735A JP 17742387 A JP17742387 A JP 17742387A JP 17742387 A JP17742387 A JP 17742387A JP S6420735 A JPS6420735 A JP S6420735A
Authority
JP
Japan
Prior art keywords
signal
echo
narrow band
detection means
echo 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
JP17742387A
Other languages
Japanese (ja)
Inventor
Hiromoto Furukawa
Satoru Ibaraki
Hiroyuki Naono
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17742387A priority Critical patent/JPS6420735A/en
Publication of JPS6420735A publication Critical patent/JPS6420735A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To stably erase an echo signal by detecting the utterance of a nearby talker by a 2-way simultaneous talking detection stage and stopping the deduction of an echo path of an echo canceller when a narrow band signal detection means detects a received input signal to be a narrow band signal. CONSTITUTION:A narrow band signal detection means 7 decides whether or not a received input signal is a narrow band signal and an AND means 10 ANDs the decision result of the 2-way simultaneous talking detection means 6 with the discrimination of the narrow band signal detection means 7 to control the echo canceller 5. That is, when the 2-way simultaneous talking detection means 6 decides it that a nearby talker utters, the means 7 decides the reception signal to be in the narrow band so as to allow the deduction of the echo path characteristic of the echo canceller 5 to be stopped. Thus, erroneous characteristic deduction by the narrow hand signal is avoided and the echo canceller deducts the characteristic of the echo path correctly and the echo signal is erased stably.
JP17742387A 1987-07-16 1987-07-16 Echo canceller Pending JPS6420735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17742387A JPS6420735A (en) 1987-07-16 1987-07-16 Echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17742387A JPS6420735A (en) 1987-07-16 1987-07-16 Echo canceller

Publications (1)

Publication Number Publication Date
JPS6420735A true JPS6420735A (en) 1989-01-24

Family

ID=16030669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17742387A Pending JPS6420735A (en) 1987-07-16 1987-07-16 Echo canceller

Country Status (1)

Country Link
JP (1) JPS6420735A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0772082A1 (en) 1995-10-23 1997-05-07 Konica Corporation Plastic film with antistatic layer and silver halide light-sensitive photographic element using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0772082A1 (en) 1995-10-23 1997-05-07 Konica Corporation Plastic film with antistatic layer and silver halide light-sensitive photographic element using the same

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