GB1066939A - Improvements in or relating to colour television transmitters - Google Patents

Improvements in or relating to colour television transmitters

Info

Publication number
GB1066939A
GB1066939A GB18175/65A GB1817565A GB1066939A GB 1066939 A GB1066939 A GB 1066939A GB 18175/65 A GB18175/65 A GB 18175/65A GB 1817565 A GB1817565 A GB 1817565A GB 1066939 A GB1066939 A GB 1066939A
Authority
GB
United Kingdom
Prior art keywords
signal
phase
burst
component
quadrature
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
GB18175/65A
Inventor
Kenneth George Freeman
Richard Norman Jackson
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Publication of GB1066939A publication Critical patent/GB1066939A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
    • H04N11/162—Encoding means therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Television Systems (AREA)
  • Color Television Systems (AREA)

Abstract

1,066,939. Colour television. MULLARD Ltd. March 3, 1966 [April 29, 1965], No. 18175/65. Addition to 1,005,696. Heading H4F. A transmitter for producing a chrominance carrier signal as described in Specification, 1,005,696, which comprises a. first component Á = a(R - Y) + a(B - Y) and a second quadrature component p = b(R - Y) - b(BY) which is reversed in phase (- p) in alternate lines, also includes means for producing between lines a synchronizing carrier " burst " signal B1 which is switched to a quadrature phase position B2 following alternate lines. The phase, of the signal B1 equals that of one of the components Á, p or the inversion thereof. As illustrated the phase of signal B1 corresponds to the inverse of the phase of component Á whereby the mean phase of B1 and B2 coincides with the axis, - (B - Y), occupied by the " burst " in conventional N.T.S.C. and P.A.L. systems. In alternative arrangements the mean phase may coincide with the + (B - Y), + (R - Y) or - (R - Y) axis. The "` burst " signal is produced by pulses from a source (4), Fig. 2 (not shown), which are applied to the quadrature modulators (1) and (2) via a switch (5) which is'changed over at line rate. The" burst "signals are established in the appropriate quadrant by choice of polarity of the pulses in relation to that of the colour modulating signal. The chrominance signal is modulated on a main carrier, -which carries a luminance signal, in modulator (3).
GB18175/65A 1963-08-09 1965-04-29 Improvements in or relating to colour television transmitters Expired GB1066939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31584/63A GB1005696A (en) 1963-08-09 1963-08-09 Improvements in or relating to colour television transmitters

Publications (1)

Publication Number Publication Date
GB1066939A true GB1066939A (en) 1967-04-26

Family

ID=10325308

Family Applications (2)

Application Number Title Priority Date Filing Date
GB31584/63A Expired GB1005696A (en) 1963-08-09 1963-08-09 Improvements in or relating to colour television transmitters
GB18175/65A Expired GB1066939A (en) 1963-08-09 1965-04-29 Improvements in or relating to colour television transmitters

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB31584/63A Expired GB1005696A (en) 1963-08-09 1963-08-09 Improvements in or relating to colour television transmitters

Country Status (3)

Country Link
FR (1) FR1403596A (en)
GB (2) GB1005696A (en)
NL (1) NL6408849A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700793A (en) * 1970-06-09 1972-10-24 Bell Telephone Labor Inc Frequency interleaved video multiplex system
US4296431A (en) * 1980-04-11 1981-10-20 Ygnacio Inc. High-resolution television system
US5249038A (en) * 1992-03-19 1993-09-28 Matsushita Electric Corporation Of America System and method for converting component video signals to a composite video signal compatible with the pal standard

Also Published As

Publication number Publication date
GB1005696A (en) 1965-09-29
FR1403596A (en) 1965-06-18
NL6408849A (en) 1965-02-10

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