GB1216352A - Improvements in or relating to echo suppression systems - Google Patents

Improvements in or relating to echo suppression systems

Info

Publication number
GB1216352A
GB1216352A GB31568/69A GB3156869A GB1216352A GB 1216352 A GB1216352 A GB 1216352A GB 31568/69 A GB31568/69 A GB 31568/69A GB 3156869 A GB3156869 A GB 3156869A GB 1216352 A GB1216352 A GB 1216352A
Authority
GB
United Kingdom
Prior art keywords
line
signal
incoming
outgoing
state
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
GB31568/69A
Other languages
English (en)
Inventor
Carl Jerome May Jr
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1216352A publication Critical patent/GB1216352A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H04J3/047—Distributors with transistors or integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
GB31568/69A 1968-06-21 1969-06-23 Improvements in or relating to echo suppression systems Expired GB1216352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73892468A 1968-06-21 1968-06-21

Publications (1)

Publication Number Publication Date
GB1216352A true GB1216352A (en) 1970-12-23

Family

ID=24970054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31568/69A Expired GB1216352A (en) 1968-06-21 1969-06-23 Improvements in or relating to echo suppression systems

Country Status (7)

Country Link
US (1) US3562448A (OSRAM)
JP (1) JPS507887B1 (OSRAM)
BE (1) BE734896A (OSRAM)
DE (1) DE1931239A1 (OSRAM)
FR (1) FR2011448A1 (OSRAM)
GB (1) GB1216352A (OSRAM)
SE (1) SE351093B (OSRAM)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673355A (en) * 1970-09-02 1972-06-27 Bell Telephone Labor Inc Common control digital echo suppression
US3896273A (en) * 1971-01-08 1975-07-22 Communications Satellite Corp Digital echo suppressor
JPS5631774B2 (OSRAM) * 1971-08-13 1981-07-23
US3821494A (en) * 1972-07-14 1974-06-28 Ibm Digital echo suppressor with direct table look up control by delta coded signals
US4051332A (en) * 1973-08-20 1977-09-27 Nippon Telegraph And Telephone Public Corporation Multiplex digital echo suppression system
JPS5317451B2 (OSRAM) * 1973-08-20 1978-06-08
FR2255762B1 (OSRAM) * 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
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
US4029912A (en) * 1975-12-10 1977-06-14 Bell Telephone Laboratories, Incorporated Common control digital echo suppressor
US4088851A (en) * 1976-04-28 1978-05-09 Wescom, Inc. Digital echo suppressor
US5022074A (en) * 1985-07-01 1991-06-04 Rockwell International Corporation Digital echo suppressor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305646A (en) * 1963-11-13 1967-02-21 Bell Telephone Labor Inc Echo suppressor with improved break-in circuitry

Also Published As

Publication number Publication date
SE351093B (OSRAM) 1972-11-13
DE1931239A1 (de) 1970-01-02
JPS507887B1 (OSRAM) 1975-03-31
FR2011448A1 (OSRAM) 1970-02-27
BE734896A (OSRAM) 1969-12-01
US3562448A (en) 1971-02-09

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