JPS647704B2 - - Google Patents
Info
- Publication number
- JPS647704B2 JPS647704B2 JP2491081A JP2491081A JPS647704B2 JP S647704 B2 JPS647704 B2 JP S647704B2 JP 2491081 A JP2491081 A JP 2491081A JP 2491081 A JP2491081 A JP 2491081A JP S647704 B2 JPS647704 B2 JP S647704B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- tap coefficient
- pseudo
- correction amount
- echo
- 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.)
- Expired
Links
- 238000012937 correction Methods 0.000 claims description 40
- 230000004044 response Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2491081A JPS57140040A (en) | 1981-02-24 | 1981-02-24 | Echo canceller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2491081A JPS57140040A (en) | 1981-02-24 | 1981-02-24 | Echo canceller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57140040A JPS57140040A (en) | 1982-08-30 |
| JPS647704B2 true JPS647704B2 (enrdf_load_stackoverflow) | 1989-02-09 |
Family
ID=12151327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2491081A Granted JPS57140040A (en) | 1981-02-24 | 1981-02-24 | Echo canceller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57140040A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61239728A (ja) * | 1985-03-27 | 1986-10-25 | Fujitsu Ltd | エコ−キヤンセラ装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064379A (en) * | 1976-06-11 | 1977-12-20 | Communications Satellite Corporation | Logarithmic echo canceller |
| JPS5354408A (en) * | 1976-10-27 | 1978-05-17 | Nec Corp | Applicable echo suppressor |
-
1981
- 1981-02-24 JP JP2491081A patent/JPS57140040A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57140040A (en) | 1982-08-30 |