JPS6429093A - Echo erasing device - Google Patents
Echo erasing deviceInfo
- Publication number
- JPS6429093A JPS6429093A JP18361087A JP18361087A JPS6429093A JP S6429093 A JPS6429093 A JP S6429093A JP 18361087 A JP18361087 A JP 18361087A JP 18361087 A JP18361087 A JP 18361087A JP S6429093 A JPS6429093 A JP S6429093A
- Authority
- JP
- Japan
- Prior art keywords
- tap
- echo
- signal
- coefficient
- echo signal
- 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
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 an echo path with an initial training signal and variably setting a tap length in order to generate a pseudo echo signal in accordance with the reververating time. CONSTITUTION:A learning circuit 4 inputs the initial training signal outputted from a training circuit 3 and assumes the echo path characteristics of the echo path formed by an acoustical coupling between a speaker 1 and a microphone 2 in the form of an impulse response. A coefficient multiplier 6 multiplies each tap output of a tap delay line 5 by a tap coefficient, which constitutes the echo characteristics assumed at the learning circuit 4, and executes tap- coefficient-processing. An adder 7 adds each tap-coefficient-processed tap output and generates the pseudo echo signal. The pseudo echo signal is given to a subtracter 8 and the cancellation of the echo signal contained in an input sound signal is executed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183610A JP2542624B2 (en) | 1987-07-24 | 1987-07-24 | Echo canceller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62183610A JP2542624B2 (en) | 1987-07-24 | 1987-07-24 | Echo canceller |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6429093A true JPS6429093A (en) | 1989-01-31 |
JP2542624B2 JP2542624B2 (en) | 1996-10-09 |
Family
ID=16138805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62183610A Expired - Fee Related JP2542624B2 (en) | 1987-07-24 | 1987-07-24 | Echo canceller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2542624B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011232691A (en) * | 2010-04-30 | 2011-11-17 | Honda Motor Co Ltd | Dereverberation device and dereverberation method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58114554A (en) * | 1981-12-28 | 1983-07-07 | Nec Corp | Howling preventing device |
-
1987
- 1987-07-24 JP JP62183610A patent/JP2542624B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58114554A (en) * | 1981-12-28 | 1983-07-07 | Nec Corp | Howling preventing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
JP2542624B2 (en) | 1996-10-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |