JPS6420735A - Echo canceller - Google Patents
Echo cancellerInfo
- 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
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.
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)
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 |
-
1987
- 1987-07-16 JP JP17742387A patent/JPS6420735A/en active Pending
Cited By (1)
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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