GB530956A - Improvements in synchronizing electric signalling systems by means of repeated impulses - Google Patents

Improvements in synchronizing electric signalling systems by means of repeated impulses

Info

Publication number
GB530956A
GB530956A GB19841/39A GB1984139A GB530956A GB 530956 A GB530956 A GB 530956A GB 19841/39 A GB19841/39 A GB 19841/39A GB 1984139 A GB1984139 A GB 1984139A GB 530956 A GB530956 A GB 530956A
Authority
GB
United Kingdom
Prior art keywords
synchronizing impulses
july
impulses
signalling systems
impulse
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
GB19841/39A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB530956A publication Critical patent/GB530956A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/213—Circuitry for suppressing or minimising impulsive noise

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

530,956. Relaxation oscillators. STANDARD TELEPHONES & CABLES, Ltd. July 7, 1939, No. 19841. Convention date, July 7, 1938. [Class 40 (iii)] The effect of parasitic disturbances between regularly occurring synchronizing impulses of a television or other transmission is reduced by combining each impulse with an electrical echo of a previous impulse. The valve 3 separates synchronizing impulses from image signals and applies them over connection 4 to a line sweep circuit. An artificial line 1 terminated by an impedance 5 is connected across the anode impedance 2 and has a send and return transmission time approximately equal to the interval between synchronizing impulses.
GB19841/39A 1938-07-07 1939-07-07 Improvements in synchronizing electric signalling systems by means of repeated impulses Expired GB530956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR848352T 1938-07-07

Publications (1)

Publication Number Publication Date
GB530956A true GB530956A (en) 1940-12-24

Family

ID=9314236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19841/39A Expired GB530956A (en) 1938-07-07 1939-07-07 Improvements in synchronizing electric signalling systems by means of repeated impulses

Country Status (3)

Country Link
FR (1) FR848352A (en)
GB (1) GB530956A (en)
NL (1) NL66324C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570805A (en) * 1946-07-20 1951-10-09 Hazeltine Research Inc Signal-translating system
US2659816A (en) * 1946-03-07 1953-11-17 Cossor Ltd A C Nonsinusoidal amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659816A (en) * 1946-03-07 1953-11-17 Cossor Ltd A C Nonsinusoidal amplifier
US2570805A (en) * 1946-07-20 1951-10-09 Hazeltine Research Inc Signal-translating system

Also Published As

Publication number Publication date
NL66324C (en)
FR848352A (en) 1939-10-27

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