DE1920961A1 - Selective echo suppressor for a speech circuit on a four-wire transmission system - Google Patents

Selective echo suppressor for a speech circuit on a four-wire transmission system

Info

Publication number
DE1920961A1
DE1920961A1 DE19691920961 DE1920961A DE1920961A1 DE 1920961 A1 DE1920961 A1 DE 1920961A1 DE 19691920961 DE19691920961 DE 19691920961 DE 1920961 A DE1920961 A DE 1920961A DE 1920961 A1 DE1920961 A1 DE 1920961A1
Authority
DE
Germany
Prior art keywords
transmission system
wire transmission
echo suppressor
speech circuit
selective 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.)
Withdrawn
Application number
DE19691920961
Other languages
German (de)
Other versions
DE1920961B2 (en
Inventor
Hermann Bendel
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
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19691920961 priority Critical patent/DE1920961B2/en
Priority to NL7005280A priority patent/NL7005280A/xx
Priority to FR7014568A priority patent/FR2039429A1/fr
Priority to GB1944970A priority patent/GB1269864A/en
Priority to JP3533870A priority patent/JPS5117849B1/ja
Publication of DE1920961A1 publication Critical patent/DE1920961A1/en
Publication of DE1920961B2 publication Critical patent/DE1920961B2/en
Withdrawn legal-status Critical Current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
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE19691920961 1969-04-24 1969-04-24 Selective echo suppressor for a speech circuit on a four-wire transmission system Withdrawn DE1920961B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19691920961 DE1920961B2 (en) 1969-04-24 1969-04-24 Selective echo suppressor for a speech circuit on a four-wire transmission system
NL7005280A NL7005280A (en) 1969-04-24 1970-04-13
FR7014568A FR2039429A1 (en) 1969-04-24 1970-04-22
GB1944970A GB1269864A (en) 1969-04-24 1970-04-23 Improvements in or relating to echo traps
JP3533870A JPS5117849B1 (en) 1969-04-24 1970-04-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691920961 DE1920961B2 (en) 1969-04-24 1969-04-24 Selective echo suppressor for a speech circuit on a four-wire transmission system

Publications (2)

Publication Number Publication Date
DE1920961A1 true DE1920961A1 (en) 1970-10-22
DE1920961B2 DE1920961B2 (en) 1970-10-22

Family

ID=5732246

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691920961 Withdrawn DE1920961B2 (en) 1969-04-24 1969-04-24 Selective echo suppressor for a speech circuit on a four-wire transmission system

Country Status (1)

Country Link
DE (1) DE1920961B2 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE499995C (en) * 1926-11-22 1930-06-18 Siemens & Halske Akt Ges Two-way transmission system with amplifiers
US3370294A (en) * 1964-05-13 1968-02-20 Leonard R. Kahn Communications echo suppression
GB1207368A (en) * 1966-12-24 1970-09-30 Consiglio Nazionale Ricerche A system and device for selective echo suppression and noise reduction in telephone circuits

Also Published As

Publication number Publication date
DE1920961B2 (en) 1970-10-22

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee