JPS561684A - Recoder for color video signal - Google Patents

Recoder for color video signal

Info

Publication number
JPS561684A
JPS561684A JP7741579A JP7741579A JPS561684A JP S561684 A JPS561684 A JP S561684A JP 7741579 A JP7741579 A JP 7741579A JP 7741579 A JP7741579 A JP 7741579A JP S561684 A JPS561684 A JP S561684A
Authority
JP
Japan
Prior art keywords
amplitude
signal
circuit
composite color
amplifier
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.)
Granted
Application number
JP7741579A
Other languages
Japanese (ja)
Other versions
JPS6148317B2 (en
Inventor
Chojuro Yamamitsu
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7741579A priority Critical patent/JPS561684A/en
Priority to US06/158,729 priority patent/US4356506A/en
Priority to DE3022781A priority patent/DE3022781C2/en
Publication of JPS561684A publication Critical patent/JPS561684A/en
Publication of JPS6148317B2 publication Critical patent/JPS6148317B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To increase the S/N of the composite color signal as well as reduce the cross-color, by recording the amplitude of the recording composite color signal so as to approximate to the amplitude of the carrier chrominance signal and then to be set to the original state when reproduced. CONSTITUTION:Composite color signal Es obtained from input terminal 11 and through the band filter is applied to amplifier 12 to be amplified with amplification degree A>>1. After this, the output signal is applied to output terminal 13 and nonlinear circuit 14. The gain of amplifier 12 is controlled by the control signal sent from the negative feedback circuit consisting of circuit 14, amplitude detector 15 and time constant circuit 16 each. Thus the output of amplifier 12 is set to the fixed amplitude level. At the same time, circuit 14 is used as the diode limiter comprising diodes D1 and D2, and the amplitude of signal Es is recorded so as to approximate to the amplitude of the carrier chrominance signal and then set to the original state when reproduced. As a result, the S/N can be increased for the composite color signal.
JP7741579A 1979-06-18 1979-06-18 Recoder for color video signal Granted JPS561684A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP7741579A JPS561684A (en) 1979-06-18 1979-06-18 Recoder for color video signal
US06/158,729 US4356506A (en) 1979-06-18 1980-06-12 Automatic chrominance control circuit for a color video tape recorder
DE3022781A DE3022781C2 (en) 1979-06-18 1980-06-18 Device for the automatic control of the amplification of a color signal for a video recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7741579A JPS561684A (en) 1979-06-18 1979-06-18 Recoder for color video signal

Publications (2)

Publication Number Publication Date
JPS561684A true JPS561684A (en) 1981-01-09
JPS6148317B2 JPS6148317B2 (en) 1986-10-23

Family

ID=13633302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7741579A Granted JPS561684A (en) 1979-06-18 1979-06-18 Recoder for color video signal

Country Status (1)

Country Link
JP (1) JPS561684A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154797A (en) * 1984-01-25 1985-08-14 Hitachi Ltd Circuit for processing color signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60154797A (en) * 1984-01-25 1985-08-14 Hitachi Ltd Circuit for processing color signal

Also Published As

Publication number Publication date
JPS6148317B2 (en) 1986-10-23

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