JPS55149589A - Frequency characteristic improving circuit for color signal - Google Patents

Frequency characteristic improving circuit for color signal

Info

Publication number
JPS55149589A
JPS55149589A JP5736979A JP5736979A JPS55149589A JP S55149589 A JPS55149589 A JP S55149589A JP 5736979 A JP5736979 A JP 5736979A JP 5736979 A JP5736979 A JP 5736979A JP S55149589 A JPS55149589 A JP S55149589A
Authority
JP
Japan
Prior art keywords
signal
color difference
luminance signal
fed
difference signal
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
JP5736979A
Other languages
Japanese (ja)
Inventor
Takafumi Okada
Yutaka Tanaka
Atsushi Matsuzaki
Toshinobu Isobe
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP5736979A priority Critical patent/JPS55149589A/en
Publication of JPS55149589A publication Critical patent/JPS55149589A/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
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase

Abstract

PURPOSE:To increase the color resolution by high band correction of color signal with the high band luminance signal, when the luminance signal lower than a given level of low band color difference signal is input. CONSTITUTION:The narrow band color difference signal from the terminal 1 is made to low band color difference signal via the filter 2 and fed to the gates 15, 16. Futher, the luminance signal via the amplifier 18 and the low band luminance signal via the filter 19 are fed to the gates 15, 16. The gates 15, 16 output lower level input signal and the output signal is fed to the subtractor 20 to be correction use high band luminance signal. This luminance signal is fed to the adder 8 together with the low band color difference signal, and the adder 8 outputs the color difference signal compensating the high band characteristics. The luminance signal level to correct the color difference signal is arbitrarily set with the adjustment of the amplification factor of the amplifier 18.
JP5736979A 1979-05-10 1979-05-10 Frequency characteristic improving circuit for color signal Pending JPS55149589A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5736979A JPS55149589A (en) 1979-05-10 1979-05-10 Frequency characteristic improving circuit for color signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5736979A JPS55149589A (en) 1979-05-10 1979-05-10 Frequency characteristic improving circuit for color signal

Publications (1)

Publication Number Publication Date
JPS55149589A true JPS55149589A (en) 1980-11-20

Family

ID=13053666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5736979A Pending JPS55149589A (en) 1979-05-10 1979-05-10 Frequency characteristic improving circuit for color signal

Country Status (1)

Country Link
JP (1) JPS55149589A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235494A (en) * 1989-03-09 1990-09-18 Nippon Hoso Kyokai <Nhk> Low brightness level correction system for reception color television signal
JPH05236496A (en) * 1992-02-21 1993-09-10 Victor Co Of Japan Ltd Color signal correcting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02235494A (en) * 1989-03-09 1990-09-18 Nippon Hoso Kyokai <Nhk> Low brightness level correction system for reception color television signal
JPH05236496A (en) * 1992-02-21 1993-09-10 Victor Co Of Japan Ltd Color signal correcting device

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