JPS5657372A - Level control circuit for carrier chrominance signal - Google Patents

Level control circuit for carrier chrominance signal

Info

Publication number
JPS5657372A
JPS5657372A JP13280279A JP13280279A JPS5657372A JP S5657372 A JPS5657372 A JP S5657372A JP 13280279 A JP13280279 A JP 13280279A JP 13280279 A JP13280279 A JP 13280279A JP S5657372 A JPS5657372 A JP S5657372A
Authority
JP
Japan
Prior art keywords
level control
signal
control
lpf17
level
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
JP13280279A
Other languages
Japanese (ja)
Inventor
Jun Hirai
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 JP13280279A priority Critical patent/JPS5657372A/en
Publication of JPS5657372A publication Critical patent/JPS5657372A/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
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits

Abstract

PURPOSE:To ensure a reproduction of a high-quality color picture by performing a long-time level control with every field and a fine level control within the field period in the level control circuit which give a level control tothe carrier chrominance signal in the reproduced video signal supplied from the video tape recorder or the like. CONSTITUTION:The reproduced video signal sent from the input terminal 12 is supplied to the gain control amplifier 13 through the automatic color control circuit ACC11 and is then delivered 14. And part of the output signal is sent to the adder 18 by the LPF17 and in the form of the chroma level control signal of a long time. At the same time, the detector of the wave detector branched off from the LPF17 is sent to the adder 18 via the comblike filter circuit 20, and the level variation signal added to the output of the LPF17 is supplied to the gain control amplifier 13. This level variation signal is produced from the signal which performs a long-time level control with every field as well as a fine level control within the field period. With this control, a high-quality color image can be reproduced.
JP13280279A 1979-10-17 1979-10-17 Level control circuit for carrier chrominance signal Pending JPS5657372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13280279A JPS5657372A (en) 1979-10-17 1979-10-17 Level control circuit for carrier chrominance signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13280279A JPS5657372A (en) 1979-10-17 1979-10-17 Level control circuit for carrier chrominance signal

Publications (1)

Publication Number Publication Date
JPS5657372A true JPS5657372A (en) 1981-05-19

Family

ID=15089904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13280279A Pending JPS5657372A (en) 1979-10-17 1979-10-17 Level control circuit for carrier chrominance signal

Country Status (1)

Country Link
JP (1) JPS5657372A (en)

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