JPS6424520A - Echo signal removing device - Google Patents
Echo signal removing deviceInfo
- Publication number
- JPS6424520A JPS6424520A JP18189787A JP18189787A JPS6424520A JP S6424520 A JPS6424520 A JP S6424520A JP 18189787 A JP18189787 A JP 18189787A JP 18189787 A JP18189787 A JP 18189787A JP S6424520 A JPS6424520 A JP S6424520A
- Authority
- JP
- Japan
- Prior art keywords
- removing means
- deviation
- echo signal
- sampling
- tap coefficient
- 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
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To compensate a deviation in sampling value due to a time deviation according to how many times sampling time deviates by providing a 1st and a 2nd removing means and correcting the tap coefficient value of the 2nd removing means according to the removal result of the 2nd removing means. CONSTITUTION:The 1st removing means 1 generates a 1st removal signal 60 for removing the output of a sampling circuit 500 for an echo signal at all times and adds it to the output of the sampling circuit 500. The tap coefficient value is corrected adaptively by a means which corrects the deviation in the sampling time of the echo signal by the 2nd removing means 2 when the sampling time deviates from equal-interval time to remove the variation and a means which performs control adds the tap coefficient value of the 2nd removing means 2 to the tap coefficient value of the 1st removing means to stop the operation of the 2nd removing means 2. Consequently, the deviation in sample value due to the deviation in sampling time can be compensated and the echo signal can be removed irrelevantly to how many times the sampling time deviates.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18189787A JPS6424520A (en) | 1987-07-20 | 1987-07-20 | Echo signal removing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18189787A JPS6424520A (en) | 1987-07-20 | 1987-07-20 | Echo signal removing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6424520A true JPS6424520A (en) | 1989-01-26 |
Family
ID=16108796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18189787A Pending JPS6424520A (en) | 1987-07-20 | 1987-07-20 | Echo signal removing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6424520A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61256833A (en) * | 1985-01-29 | 1986-11-14 | ブリテイシユ・テレコミユニケ−シヨンズ・パブリツク・リミテツド・カンパニ | Noise cancelling method and apparatus and total dual modem |
-
1987
- 1987-07-20 JP JP18189787A patent/JPS6424520A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61256833A (en) * | 1985-01-29 | 1986-11-14 | ブリテイシユ・テレコミユニケ−シヨンズ・パブリツク・リミテツド・カンパニ | Noise cancelling method and apparatus and total dual modem |
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