JPS55147891A - Separate luminance conversion system of ntsc-system color video signal - Google Patents

Separate luminance conversion system of ntsc-system color video signal

Info

Publication number
JPS55147891A
JPS55147891A JP5571579A JP5571579A JPS55147891A JP S55147891 A JPS55147891 A JP S55147891A JP 5571579 A JP5571579 A JP 5571579A JP 5571579 A JP5571579 A JP 5571579A JP S55147891 A JPS55147891 A JP S55147891A
Authority
JP
Japan
Prior art keywords
signal
luminance
video signal
speed
color video
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.)
Pending
Application number
JP5571579A
Other languages
Japanese (ja)
Inventor
Kanji Suzuki
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.)
Edetsuku Kk
Original Assignee
Edetsuku Kk
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 Edetsuku Kk filed Critical Edetsuku Kk
Priority to JP5571579A priority Critical patent/JPS55147891A/en
Publication of JPS55147891A publication Critical patent/JPS55147891A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals

Landscapes

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

Abstract

PURPOSE:To make a picture clear by using a high-speed memory to incorporate desired I/O luminance signal characteristic data in the luminance signal of the color video signal and by correcting luminance to obtain a corrected video analogue signal. CONSTITUTION:Only the luminance signal is extracted from the video signal by color video signal controller 1 and has the level fixed by a clamp circuit and is made into an analogue signal by a level adjustment equipment and is sent to next- stage high-speed A/D converter 3 and is converted to a digital signal. This signal is given to the address line of high-speed memory 4 as an input. I/O luminance characteristic data is stored previously in high-speed memory 5, and a selector switch is used to select one. After that, the digital luminance signal is obtained from memory 4 and is converted to the corrected analogue luminance signal again by high-speed D/A converter 6 and is synthesized by synchronous mixer 7 and color signal mixer 8.
JP5571579A 1979-05-09 1979-05-09 Separate luminance conversion system of ntsc-system color video signal Pending JPS55147891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5571579A JPS55147891A (en) 1979-05-09 1979-05-09 Separate luminance conversion system of ntsc-system color video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5571579A JPS55147891A (en) 1979-05-09 1979-05-09 Separate luminance conversion system of ntsc-system color video signal

Publications (1)

Publication Number Publication Date
JPS55147891A true JPS55147891A (en) 1980-11-18

Family

ID=13006567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5571579A Pending JPS55147891A (en) 1979-05-09 1979-05-09 Separate luminance conversion system of ntsc-system color video signal

Country Status (1)

Country Link
JP (1) JPS55147891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422094A (en) * 1981-11-06 1983-12-20 Rca Corporation Digital signal processor with symmetrical transfer characteristic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422094A (en) * 1981-11-06 1983-12-20 Rca Corporation Digital signal processor with symmetrical transfer characteristic

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