GB501966A - Improvements in or relating to television systems - Google Patents

Improvements in or relating to television systems

Info

Publication number
GB501966A
GB501966A GB15728/37D GB1572837D GB501966A GB 501966 A GB501966 A GB 501966A GB 15728/37 D GB15728/37 D GB 15728/37D GB 1572837 D GB1572837 D GB 1572837D GB 501966 A GB501966 A GB 501966A
Authority
GB
United Kingdom
Prior art keywords
pulses
signals
foreground
background
white
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
GB15728/37D
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB15728/37D priority Critical patent/GB501966A/en
Priority to US210576A priority patent/US2244239A/en
Priority to DEE2361D priority patent/DE941622C/en
Publication of GB501966A publication Critical patent/GB501966A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

501,966. Television. BLUMLEIN, A. D., and SPENCER, R. E. June 7, 1937, No. 15728. [Class 40 (iii)] A foreground is scanned against a whiter-than white surface to produce signals 4 ; the whioerthan-white signals 6 are isolated by an amplitude filter 8 and controlling pulses 19, 21 are developed therefrom, to control the foreground amplifier 20 and an independent background amplifier 22 which is fed with background signals 7 produced by independently scanning a background ; the outputs of the amplifiers 20, 22 are combined at 25 so that the reproduced picture has the foreground and back. ground combined. The isolated signals 28 are applied to a delay network 9 to produce pulses 10 which are combined at 11 to produce pulses 27 and limited at 12 producing pulses 13 longer than the original pulses 28 and delayed in inception. The pulses 13 control the production of pulses 19, 21 which are superposed on the signals 4, 7. The delay in inception of pulses 19, 21 corresponds to the delayed introduced in the amplifiers 15, 17, 20 and 16, 18, 22. The pulses 19, have longer black than white peaks so that they overlap the whiter-thanwhite peaks 6. Limiters 23, 24 cut-off the displaced portions of the signals 4, 7 and the outputs are compounded at 25. The D.C. components should be present at each limiting or mixing stage. According to the Provisional Specification, the signals injected at 1, 2 need not be foreground and background scenes and the output 26 may reconstitute a picture composed of sections of each of the original scenes. Change-over from one scene to another may be produced by variation of the controlling pulses 19, 21. The control pulses 19, 21 may be obtained by scanning a black-and-white surface. Specifications 417,282, 455,785, and 482,740 are referred to.
GB15728/37D 1937-06-07 1937-06-07 Improvements in or relating to television systems Expired GB501966A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB15728/37D GB501966A (en) 1937-06-07 1937-06-07 Improvements in or relating to television systems
US210576A US2244239A (en) 1937-06-07 1938-05-28 Television system
DEE2361D DE941622C (en) 1937-06-07 1938-06-05 Arrangement for producing the signal course corresponding to a television scene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15728/37D GB501966A (en) 1937-06-07 1937-06-07 Improvements in or relating to television systems

Publications (1)

Publication Number Publication Date
GB501966A true GB501966A (en) 1939-03-07

Family

ID=10064428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15728/37D Expired GB501966A (en) 1937-06-07 1937-06-07 Improvements in or relating to television systems

Country Status (3)

Country Link
US (1) US2244239A (en)
DE (1) DE941622C (en)
GB (1) GB501966A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567203A (en) * 1946-02-05 1951-09-11 Marcel J E Golay Multiplex communication system utilizing successive, different pulse modulation techniques
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2485310A (en) * 1946-12-12 1949-10-18 Du Mont Allen B Lab Inc Video black clipper
US2610260A (en) * 1946-12-31 1952-09-09 Rca Corp Signal gain control circuits
US2568166A (en) * 1948-04-23 1951-09-18 Perry David Phillips Television image superimposition
US2541940A (en) * 1948-07-30 1951-02-13 Bruno B Rossi Electronic circuit
NL74227C (en) * 1948-09-11
US2727942A (en) * 1950-05-11 1955-12-20 Don Lee Division Of General Te Television synchronizing apparatus
US2653186A (en) * 1950-10-24 1953-09-22 Gen Electric Plural camera television control system
GB712985A (en) * 1951-02-20 1954-08-04 British Thomson Houston Co Ltd Improvements relating to the display of information in code
US2784246A (en) * 1951-04-10 1957-03-05 Gen Electric Electrical system
GB701482A (en) * 1952-02-11 1953-12-23 Marconi Wireless Telegraph Co Improvements in or relating to television and like transmitter installations
US2918525A (en) * 1953-06-24 1959-12-22 Alden Products Co Blanking circuit
US2886636A (en) * 1956-05-23 1959-05-12 Grace Francis Cecil Television control system
US3517121A (en) * 1967-06-29 1970-06-23 Us Navy Electronic periscope panning apparatus
US3812286A (en) * 1971-04-05 1974-05-21 Sarkes Tarzian Rotary special effects generator
FR2142820B1 (en) * 1971-06-25 1975-04-18 Ortf
US3898874A (en) * 1971-12-23 1975-08-12 Schenck Ag Carl Control input switching apparatus
US3868585A (en) * 1973-09-10 1975-02-25 Charles B Richmond Automatic crossfading device
JPH05130502A (en) * 1991-11-08 1993-05-25 Pioneer Electron Corp Image reproducing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767445A (en) * 1932-11-01 1934-07-16
BE403568A (en) * 1933-01-28
GB455785A (en) * 1934-04-27 1936-10-27 Theodot Vrabely Device for television transmissions
GB472762A (en) * 1936-03-28 1937-09-28 Baird Television Ltd Improvements in or relating to television and like systems

Also Published As

Publication number Publication date
DE941622C (en) 1956-04-12
US2244239A (en) 1941-06-03

Similar Documents

Publication Publication Date Title
GB501966A (en) Improvements in or relating to television systems
US3715477A (en) Video signal noise-limiting apparatus
GB1431378A (en) Colour information translating systems
US3798353A (en) Correcting vertical resolution in television color images
JPS5823031B2 (en) Special effects generator for video signals
US3562424A (en) Apparatus for improving the contrast focusing of a tv picture by aperture correcting the video tv signal on both sides
US3743766A (en) Colour television camera equipments
US2509987A (en) Nonlinear amplifier for gamma control
ES441944A1 (en) Automatic luminance channel frequency response control apparatus
US2672505A (en) Black level shift compensating amplifier
GB1291967A (en) Television camera systems
GB1268927A (en) Vertical and horizontal aperture equalization
GB1104177A (en) Television recording and reproducing apparatus
GB1480516A (en) Aperture correction circuit
GB1289082A (en)
GB450675A (en) Improvements in or relating to television and the like transmitting systems
US2921121A (en) Notch filter in brightness channel of color television transmitter
GB1330387A (en) Automatic tint control circuits for colour television receivers
US3602646A (en) Character contour edger
KR920000980B1 (en) Video signal peaking apparatus
GB1363197A (en) Correcting colour television signals
US4802010A (en) Method and apparatus for generating an adaptive peaking signal increasing the sharpness of a video signal
GB1217453A (en) Colour television camera
US2803697A (en) Color television
US3590144A (en) Chrominance subcarrier control in color television transmission