JPS4953317A - - Google Patents
Info
- Publication number
- JPS4953317A JPS4953317A JP48071401A JP7140173A JPS4953317A JP S4953317 A JPS4953317 A JP S4953317A JP 48071401 A JP48071401 A JP 48071401A JP 7140173 A JP7140173 A JP 7140173A JP S4953317 A JPS4953317 A JP S4953317A
- Authority
- JP
- Japan
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00271960A US3821494A (en) | 1972-07-14 | 1972-07-14 | Digital echo suppressor with direct table look up control by delta coded signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4953317A true JPS4953317A (https=) | 1974-05-23 |
| JPS5249286B2 JPS5249286B2 (https=) | 1977-12-16 |
Family
ID=23037826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48071401A Expired JPS5249286B2 (https=) | 1972-07-14 | 1973-06-26 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3821494A (https=) |
| JP (1) | JPS5249286B2 (https=) |
| DE (1) | DE2332884A1 (https=) |
| FR (1) | FR2193293B1 (https=) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2255762B1 (https=) * | 1973-12-21 | 1976-07-23 | Ibm France | |
| US3906172A (en) * | 1974-04-22 | 1975-09-16 | Gen Electric | Digital echo suppressor |
| US3937907A (en) * | 1974-06-13 | 1976-02-10 | Communications Satellite Corporation | Digital echo suppressor |
| US4017695A (en) * | 1974-09-30 | 1977-04-12 | Bell Telephone Laboratories, Incorporated | Customer operated gain control circuit |
| US4005276A (en) * | 1975-03-20 | 1977-01-25 | International Business Machines Corporation | Digital voice signaling with digital echo detection and voice activity compression used to cancel echo |
| NL170688C (nl) * | 1976-06-28 | 1982-12-01 | Philips Nv | Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen. |
| US4314105A (en) * | 1977-01-21 | 1982-02-02 | Mozer Forrest Shrago | Delta modulation method and system for signal compression |
| JPS53142115A (en) * | 1977-05-18 | 1978-12-11 | Fujitsu Ltd | Antisinging system |
| NO140648C (no) * | 1977-10-24 | 1983-03-29 | Elektrisk Bureau As | Direktiv kobler. |
| US4293038A (en) * | 1979-05-24 | 1981-10-06 | Baker International Corporation | Ball valve assembly |
| NL8100650A (nl) * | 1981-02-11 | 1982-09-01 | Philips Nv | Inrichting voor het corrigeren van pulsvervorming bij homochrone datatransmissie. |
| JPS5916434A (ja) * | 1982-07-19 | 1984-01-27 | Hitachi Ltd | 光通信方式 |
| US4652703A (en) * | 1983-03-01 | 1987-03-24 | Racal Data Communications Inc. | Digital voice transmission having improved echo suppression |
| US4609788A (en) * | 1983-03-01 | 1986-09-02 | Racal Data Communications Inc. | Digital voice transmission having improved echo suppression |
| US4611342A (en) * | 1983-03-01 | 1986-09-09 | Racal Data Communications Inc. | Digital voice compression having a digitally controlled AGC circuit and means for including the true gain in the compressed data |
| US5022074A (en) * | 1985-07-01 | 1991-06-04 | Rockwell International Corporation | Digital echo suppressor |
| US4748665A (en) * | 1985-07-01 | 1988-05-31 | Rockwell International Corporation | Analog echo suppressor |
| JP2626437B2 (ja) * | 1992-12-28 | 1997-07-02 | 日本電気株式会社 | 残留エコー制御装置 |
| US7098833B2 (en) * | 2004-06-04 | 2006-08-29 | Texas Instruments Incorporated | Tri-value decoder circuit and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3562448A (en) * | 1968-06-21 | 1971-02-09 | Bell Telephone Labor Inc | Common control digital echo suppression |
-
1972
- 1972-07-14 US US00271960A patent/US3821494A/en not_active Expired - Lifetime
-
1973
- 1973-06-13 FR FR7322364A patent/FR2193293B1/fr not_active Expired
- 1973-06-26 JP JP48071401A patent/JPS5249286B2/ja not_active Expired
- 1973-06-28 DE DE2332884A patent/DE2332884A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3821494A (en) | 1974-06-28 |
| FR2193293B1 (https=) | 1977-09-23 |
| DE2332884A1 (de) | 1974-01-24 |
| JPS5249286B2 (https=) | 1977-12-16 |
| FR2193293A1 (https=) | 1974-02-15 |