GB490203A - Improvements in or relating to television and like transmitting systems - Google Patents

Improvements in or relating to television and like transmitting systems

Info

Publication number
GB490203A
GB490203A GB17501/38A GB1750138A GB490203A GB 490203 A GB490203 A GB 490203A GB 17501/38 A GB17501/38 A GB 17501/38A GB 1750138 A GB1750138 A GB 1750138A GB 490203 A GB490203 A GB 490203A
Authority
GB
United Kingdom
Prior art keywords
amplifiers
pulses
phase
frame
pulse
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
GB17501/38A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB490203A publication Critical patent/GB490203A/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
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Image Analysis (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

490,203. Television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 31, 1936, No. 17501/38. Convention date, Dec. 31, 1935. Divided out of 488,268. [Class 40 (iii)] Picture analysing devices 1, 6, Fig. 1, scan different scenes, the resulting picture signals are applied to amplifiers A, B, respectively, which are rendered inoperative in turn by pulses from a generator 8, so that only one of the picture signals is fed at any instant to a common channel 3, 4 and one scene is inset to the other. The amplifiers A, B may comprise picture-signal amplifying valves 33, 34, Fig. 5, of which 34 is rendered inoperative by a pulse applied to the screen grid ; the undesired signal so produced may be removed by similarly blocking the valve 38, phase reversing its output at 39 and combining the pulse so produced with the output of valve 34. The generator 8 supplies frame and line pulses for driving the scanners 1, 6 and for alternately paralysing the amplifiers A, B. The frame frequency pulse is applied through a phase-shifter 53 to an oscillator 54 which produces rectangular frame pulses which are applied over switch M, 55 to the amplifiers A, B, a phase-reverser 12 being inserted in one lead. Similarly, the line frequency pulses are phase-shifted at 67, rendered rectangular at 68 and supplied to the amplifiers A, B. The frame and line pulses may be supplied either singly or in combination by moving the switch arm 55. The portion to be inset is controlled by varying the phaseshifters 53, 67. Specification 458,161 is referred to.
GB17501/38A 1935-12-31 1936-12-31 Improvements in or relating to television and like transmitting systems Expired GB490203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56860A US2164297A (en) 1935-12-31 1935-12-31 Television system

Publications (1)

Publication Number Publication Date
GB490203A true GB490203A (en) 1938-08-02

Family

ID=22007005

Family Applications (2)

Application Number Title Priority Date Filing Date
GB35805/36A Expired GB488268A (en) 1935-12-31 1936-12-31 Improvements in or relating to television and like systems
GB17501/38A Expired GB490203A (en) 1935-12-31 1936-12-31 Improvements in or relating to television and like transmitting systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB35805/36A Expired GB488268A (en) 1935-12-31 1936-12-31 Improvements in or relating to television and like systems

Country Status (2)

Country Link
US (1) US2164297A (en)
GB (2) GB488268A (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510714A (en) * 1946-02-09 1950-06-06 Du Mont Allen B Lab Inc Mixing circuit for television cameras
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2532063A (en) * 1946-09-07 1950-11-28 Rca Corp Position indicating system
US2546338A (en) * 1947-05-13 1951-03-27 Du Mont Allen B Lab Inc Circuit for minimizing transients during switching between two video channels
US2568166A (en) * 1948-04-23 1951-09-18 Perry David Phillips Television image superimposition
US2611819A (en) * 1949-02-26 1952-09-23 Rca Corp Television signal control system
US2613263A (en) * 1949-04-08 1952-10-07 Earl D Hilburn Plural camera television transmitter with electronic wipeout control
US2585034A (en) * 1949-10-29 1952-02-12 Hammond Jr Auxiliary camera break-in for television transmission systems
US2706218A (en) * 1949-11-15 1955-04-12 William A Wootten System for television-program film recording and record reproduction
US2737730A (en) * 1950-02-10 1956-03-13 Emi Ltd Apparatus for generating and reproducing electrical signals
US2727942A (en) * 1950-05-11 1955-12-20 Don Lee Division Of General Te Television synchronizing apparatus
US2711441A (en) * 1950-12-06 1955-06-21 Hammond Jr Television still picture transmitter
US2730565A (en) * 1951-03-21 1956-01-10 Freeman H Owens Production of composite live action and scenic effects for television
US2784246A (en) * 1951-04-10 1957-03-05 Gen Electric Electrical system
US2843654A (en) * 1951-12-01 1958-07-15 Internat Telemeter Corp Subscription television system using land line
US2843655A (en) * 1951-12-03 1958-07-15 Internat Telemeter Corp Subscription television with scrambled transmission and marquee and barker
BE518758A (en) * 1952-03-28
US2911466A (en) * 1952-07-28 1959-11-03 H D F Ltd Method of and apparatus for the control of television picture signals
DE957397C (en) * 1952-09-03 1957-01-31 Fernseh Gmbh Method and arrangement for superimposing the television signal sequences supplied by various recording devices
US2838848A (en) * 1953-01-27 1958-06-17 Ralph H Bergstad Tactical training device for simulating radar displays
US2918525A (en) * 1953-06-24 1959-12-22 Alden Products Co Blanking circuit
GB774290A (en) * 1954-02-05 1957-05-08 Communications Patents Ltd Improvements in or relating to cathode ray tube display systems or apparatus
US2809298A (en) * 1954-02-26 1957-10-08 Diamond Power Speciality Automatic selector system
US2877291A (en) * 1954-06-09 1959-03-10 Rca Corp Color television test apparatus
US2863227A (en) * 1954-07-19 1958-12-09 Howard E Chubb Training apparatus reproducing the visual and audible presentations of an electronic scanning system
US2885470A (en) * 1954-12-20 1959-05-05 Gen Precision Lab Inc Television transmission quality testing system
US2883763A (en) * 1956-09-28 1959-04-28 Otto F Schaper Carrier landing trainer
US2985065A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
US2985063A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
US2985064A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
US2961920A (en) * 1957-03-15 1960-11-29 Rca Corp Composite photography
GB834840A (en) * 1957-05-29 1960-05-11 Associated Television Ltd Improvements in lighting arrangements
US3006993A (en) * 1957-09-20 1961-10-31 Charles F Barndt Video effects generator
NL268860A (en) * 1959-04-17
US3051779A (en) * 1959-05-13 1962-08-28 Louis Marcus Wide screen television apparatus
US3017457A (en) * 1959-07-13 1962-01-16 Minnesota Mining & Mfg Transducing system
US3217098A (en) * 1962-08-29 1965-11-09 Robert A Oswald Method of policing horse races
US3207842A (en) * 1962-11-16 1965-09-21 Harry D Flagle Four channel video integrator
DE1209152B (en) * 1963-09-25 1966-01-20 Edgar F Scholz Method and device for transmitting and copying a typeface using the facilities of television broadcasting
US4965825A (en) * 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
US4541013A (en) * 1982-07-19 1985-09-10 Alpert Sidney A Football signaling system

Also Published As

Publication number Publication date
GB488268A (en) 1938-07-30
US2164297A (en) 1939-06-27

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