ES439673A1 - Echo traps - Google Patents
Echo trapsInfo
- Publication number
- ES439673A1 ES439673A1 ES439673A ES439673A ES439673A1 ES 439673 A1 ES439673 A1 ES 439673A1 ES 439673 A ES439673 A ES 439673A ES 439673 A ES439673 A ES 439673A ES 439673 A1 ES439673 A1 ES 439673A1
- Authority
- ES
- Spain
- Prior art keywords
- path
- reception
- conversation
- emission
- attenuation
- 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
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
Abstract
Improvements in echo suppressors for speech circuits in four-wire transmission systems, of the type that are connected in both transmission directions considered as the emission path and the reception path, respectively, with respect to a bifurcation transition to a transmission path of two wires, and have a blocking element connected in the emission path, an attenuating element connected in the reception path and a control device that when only conversation levels arise in the side of the reception path activates the blocking element that it is normally in pass, and when simultaneously speaking levels arise on the side of the reception path and on the side of the emission path it activates the attenuation element that is normally in passage, characterized in that the control device is developed in such a way that in the state of the simultaneous appearance of conversation levels in the On the receive path and on the send path side, it governs the attenuation element causing it to produce small attenuations or leaves it totally ineffective, when the conversation level of the emission path is exceeded by the conversation level of the emission path side. reception or conversation level on the receive path side reduced in attenuation of the bifurcation transition. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742435607 DE2435607C3 (en) | 1974-07-24 | Echo lock |
Publications (1)
Publication Number | Publication Date |
---|---|
ES439673A1 true ES439673A1 (en) | 1977-03-01 |
Family
ID=5921407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES439673A Expired ES439673A1 (en) | 1974-07-24 | 1975-07-23 | Echo traps |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5433087B2 (en) |
AU (1) | AU471927B2 (en) |
ES (1) | ES439673A1 (en) |
FR (1) | FR2280262A1 (en) |
GB (1) | GB1510162A (en) |
IL (1) | IL47682A (en) |
IT (1) | IT1039912B (en) |
NL (1) | NL7508871A (en) |
SE (1) | SE7508385L (en) |
ZA (1) | ZA754467B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3942116A (en) * | 1975-03-13 | 1976-03-02 | California Microwave, Inc. | Transceiver having improved voice actuated carrier and echo suppression circuit |
JPS6050092B2 (en) * | 1977-11-08 | 1985-11-06 | ケイディディ株式会社 | Adaptive control echo rejection device |
DE2967644D1 (en) * | 1979-09-17 | 1987-01-29 | Eci Telecom Ltd | Apparatus for use in telephone communication |
-
1975
- 1975-06-27 GB GB27285/75A patent/GB1510162A/en not_active Expired
- 1975-07-10 IL IL47682A patent/IL47682A/en unknown
- 1975-07-10 AU AU82907/75A patent/AU471927B2/en not_active Expired
- 1975-07-11 ZA ZA00754467A patent/ZA754467B/en unknown
- 1975-07-18 IT IT25529/75A patent/IT1039912B/en active
- 1975-07-18 FR FR7522547A patent/FR2280262A1/en active Granted
- 1975-07-23 SE SE7508385A patent/SE7508385L/en unknown
- 1975-07-23 ES ES439673A patent/ES439673A1/en not_active Expired
- 1975-07-24 NL NL7508871A patent/NL7508871A/en unknown
- 1975-07-24 JP JP9068175A patent/JPS5433087B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5433087B2 (en) | 1979-10-18 |
IL47682A0 (en) | 1975-10-15 |
DE2435607A1 (en) | 1976-02-05 |
AU471927B2 (en) | 1976-05-06 |
AU8290775A (en) | 1976-05-06 |
DE2435607B2 (en) | 1976-05-20 |
JPS5136806A (en) | 1976-03-27 |
IT1039912B (en) | 1979-12-10 |
ZA754467B (en) | 1976-06-30 |
IL47682A (en) | 1977-07-31 |
FR2280262A1 (en) | 1976-02-20 |
SE7508385L (en) | 1976-01-26 |
NL7508871A (en) | 1976-01-27 |
GB1510162A (en) | 1978-05-10 |
FR2280262B1 (en) | 1979-06-15 |
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