JPH0131731B2 - - Google Patents
Info
- Publication number
- JPH0131731B2 JPH0131731B2 JP16563180A JP16563180A JPH0131731B2 JP H0131731 B2 JPH0131731 B2 JP H0131731B2 JP 16563180 A JP16563180 A JP 16563180A JP 16563180 A JP16563180 A JP 16563180A JP H0131731 B2 JPH0131731 B2 JP H0131731B2
- Authority
- JP
- Japan
- Prior art keywords
- echo
- level
- signal
- residual
- cancellation
- 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
- 238000005259 measurement Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000008054 signal transmission 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 |
|---|---|---|---|
| JP16563180A JPS5789337A (en) | 1980-11-25 | 1980-11-25 | Echo erasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16563180A JPS5789337A (en) | 1980-11-25 | 1980-11-25 | Echo erasing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5789337A JPS5789337A (en) | 1982-06-03 |
| JPH0131731B2 true JPH0131731B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1989-06-27 |
Family
ID=15816027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16563180A Granted JPS5789337A (en) | 1980-11-25 | 1980-11-25 | Echo erasing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5789337A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949027A (ja) * | 1982-09-14 | 1984-03-21 | Fujitsu Ltd | エコ−キヤンセラ制御方式 |
-
1980
- 1980-11-25 JP JP16563180A patent/JPS5789337A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5789337A (en) | 1982-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2518433B2 (ja) | ダブルト―ク検出回路 | |
| JP3288383B2 (ja) | エコー経路変化の検出方法およびエコー・キャンセラ | |
| US7450714B2 (en) | Echo canceller having improved non-linear processor | |
| JP2949601B2 (ja) | エコーキャンセリング装置におけるエコー反射ロスの決定方法 | |
| US8184818B2 (en) | Double-talk detector with accuracy and speed of detection improved and a method therefor | |
| EP0135843B1 (en) | Echo canceller systems | |
| US6215880B1 (en) | Two-wire conference apparatus with echo canceler without training | |
| JP2765494B2 (ja) | ２線式音声会議装置 | |
| JPH0131731B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | ||
| JPS6096037A (ja) | 反響消去装置 | |
| JP3370594B2 (ja) | エコーキャンセラのフィルタ係数更新制御装置 | |
| JPS6016773B2 (ja) | 双方向通話検出器 | |
| JP3323068B2 (ja) | エコーキャンセラ | |
| JPH0456421A (ja) | エコーキャンセラー | |
| JPS63318821A (ja) | 反響消去装置 | |
| JP2516260B2 (ja) | エコ―キャンセラ | |
| JPH05244042A (ja) | エコーキャンセラの双方向通話によるエコー消去量低下防止回路 | |
| JPS63234733A (ja) | エコ−キヤンセラ | |
| JPH04262627A (ja) | エコーキャンセラ装置 | |
| JPH03179931A (ja) | 双方向通話状態判定方式 | |
| JPH06152474A (ja) | センタクリッパ回路 | |
| JPS6266727A (ja) | センタ−クリツパ装置 | |
| JPS5842663B2 (ja) | 反響消去装置 | |
| JPH03280725A (ja) | エコーキヤンセラ | |
| JPH0374538B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |