ES439673A1 - Echo traps - Google Patents

Echo traps

Info

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
Application number
ES439673A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19742435607 external-priority patent/DE2435607C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of ES439673A1 publication Critical patent/ES439673A1/en
Expired legal-status Critical Current

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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

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)
ES439673A 1974-07-24 1975-07-23 Echo traps Expired ES439673A1 (en)

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)

* Cited by examiner, † Cited by third party
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
DE2967640D1 (en) * 1979-09-17 1987-01-15 Eci Telecom Ltd Apparatus for use in telephone communication

Also Published As

Publication number Publication date
SE7508385L (en) 1976-01-26
FR2280262A1 (en) 1976-02-20
IL47682A0 (en) 1975-10-15
DE2435607B2 (en) 1976-05-20
IT1039912B (en) 1979-12-10
AU471927B2 (en) 1976-05-06
AU8290775A (en) 1976-05-06
NL7508871A (en) 1976-01-27
IL47682A (en) 1977-07-31
FR2280262B1 (en) 1979-06-15
JPS5136806A (en) 1976-03-27
JPS5433087B2 (en) 1979-10-18
GB1510162A (en) 1978-05-10
ZA754467B (en) 1976-06-30
DE2435607A1 (en) 1976-02-05

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