JPS6429132A - Echo canceller - Google Patents
Echo cancellerInfo
- Publication number
- JPS6429132A JPS6429132A JP18640887A JP18640887A JPS6429132A JP S6429132 A JPS6429132 A JP S6429132A JP 18640887 A JP18640887 A JP 18640887A JP 18640887 A JP18640887 A JP 18640887A JP S6429132 A JPS6429132 A JP S6429132A
- Authority
- JP
- Japan
- Prior art keywords
- training
- signal
- coefficient calculation
- tap coefficient
- calculation system
- 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
Abstract
PURPOSE:To reduce the time to be converged finally, to freely set a training time and to set a short arithmetic word length by providing a pseudo echo signal generating means and using the sequential tap coefficient calculation system and the batch tap coefficient calculation system in common at the training so as to estimate the echo path characteristic. CONSTITUTION:The output means outputting a reception signal to an eacho path is provided with a transmission signal output means outputting an audible tone as a transmission signal, a pseudo echo signal generating means 6 estimating the echo path characteristic between the output means and the transmission signal output means so as to generate a pseudo echo signal, a subtraction means 7 subtracting the pseudo echo signal from the transmission signal and a training signal source generating a training signal, and the pseudo echo signal generating means 6 uses the sequential tap coefficient calculation system and the batch tap coefficient calculation system in common at the training to estimate the echo path characteristic. Thus, the training time is set freely and the arithmetic word length is set short and the time to be converged finally is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62186408A JP2585279B2 (en) | 1987-07-24 | 1987-07-24 | Eco-Cancer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62186408A JP2585279B2 (en) | 1987-07-24 | 1987-07-24 | Eco-Cancer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6429132A true JPS6429132A (en) | 1989-01-31 |
JP2585279B2 JP2585279B2 (en) | 1997-02-26 |
Family
ID=16187892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62186408A Expired - Lifetime JP2585279B2 (en) | 1987-07-24 | 1987-07-24 | Eco-Cancer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2585279B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05315993A (en) * | 1991-08-31 | 1993-11-26 | Koichi Mino | Communication system having speaker to be used as microphone in common |
JP2007126191A (en) * | 2005-11-04 | 2007-05-24 | Toyo Seikan Kaisha Ltd | Splash preventing method for positive pressure beverage container and can lid therefor |
JP2009232436A (en) * | 2008-03-24 | 2009-10-08 | Matech Inc | Single transducer full duplex talking circuit and audio circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58206433A (en) * | 1982-05-27 | 1983-12-01 | Komatsu Ltd | Hoist interlock device for trolley-assist dump truck |
-
1987
- 1987-07-24 JP JP62186408A patent/JP2585279B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58206433A (en) * | 1982-05-27 | 1983-12-01 | Komatsu Ltd | Hoist interlock device for trolley-assist dump truck |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05315993A (en) * | 1991-08-31 | 1993-11-26 | Koichi Mino | Communication system having speaker to be used as microphone in common |
JP2007126191A (en) * | 2005-11-04 | 2007-05-24 | Toyo Seikan Kaisha Ltd | Splash preventing method for positive pressure beverage container and can lid therefor |
JP2009232436A (en) * | 2008-03-24 | 2009-10-08 | Matech Inc | Single transducer full duplex talking circuit and audio circuit |
Also Published As
Publication number | Publication date |
---|---|
JP2585279B2 (en) | 1997-02-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20071121 |