JPS55123281A - Automatic chroma control system - Google Patents

Automatic chroma control system

Info

Publication number
JPS55123281A
JPS55123281A JP2935879A JP2935879A JPS55123281A JP S55123281 A JPS55123281 A JP S55123281A JP 2935879 A JP2935879 A JP 2935879A JP 2935879 A JP2935879 A JP 2935879A JP S55123281 A JPS55123281 A JP S55123281A
Authority
JP
Japan
Prior art keywords
signal
level
pilot signal
voltage
burst
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
JP2935879A
Other languages
Japanese (ja)
Inventor
Eiju Fujii
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi 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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP2935879A priority Critical patent/JPS55123281A/en
Publication of JPS55123281A publication Critical patent/JPS55123281A/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

Landscapes

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

Abstract

PURPOSE:To exercise extremely-stable and automatic chroma control with high fidelity by extracting a pilot signal from a reproduced video signal including the pilot signal and then by using it as a reference voltage. CONSTITUTION:From video signal VIN, burst level detector BLD detects the level of a color burst signal and this obtained DC voltage is digitized by pilot signal generator PSG, mixed by mixer MIX in the blanking interval of signal VIN, and modulated by modulator MOD before being sent out to video head HD via recording amplifier RA. In reproduction, a pilot signal is extracted from video signal VOUT by pilot signal detector PSD and then converted by DC converter DCC into a DC voltage, which is applied to comparator CP as a reference voltage. Here, a reproduced burst signal level is compared and controlled to equalize it to a recording level, and the frequency component of a chroma signal is equalized simultaneously to the recording level of it.
JP2935879A 1979-03-15 1979-03-15 Automatic chroma control system Pending JPS55123281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2935879A JPS55123281A (en) 1979-03-15 1979-03-15 Automatic chroma control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2935879A JPS55123281A (en) 1979-03-15 1979-03-15 Automatic chroma control system

Publications (1)

Publication Number Publication Date
JPS55123281A true JPS55123281A (en) 1980-09-22

Family

ID=12273962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2935879A Pending JPS55123281A (en) 1979-03-15 1979-03-15 Automatic chroma control system

Country Status (1)

Country Link
JP (1) JPS55123281A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700239A (en) * 1982-11-16 1987-10-13 Sony Corporation Differential gain and differential phase compensator circuit of a video signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700239A (en) * 1982-11-16 1987-10-13 Sony Corporation Differential gain and differential phase compensator circuit of a video signal

Similar Documents

Publication Publication Date Title
KR890004275A (en) Magnetic recording and playback equipment
GB1479627A (en) Colour video signal reproducing apparatus
NL8101160A (en) TRANSFER SYSTEM.
GB1254564A (en) Recording and reproducing system for color video signals
CN1010272B (en) Chrominance signal processing apparatus
JPS55123281A (en) Automatic chroma control system
US4312019A (en) Phase corrected video recording system
JPS5526781A (en) Transmitter for digital video signal
DE4121859A1 (en) COLOR VALUE PLAYBACK SWITCHING
GB1484280A (en) System for recording and reproducing a colour television signal
JPS54161230A (en) Damping system for color video signal
JP2524521B2 (en) Magnetic recording / reproducing device
JPS56119591A (en) Recording and reproducing device of color video signal
JPS5630382A (en) Video signal recording and reproducing device
JPS5630383A (en) Video signal recording and reproducing device
JPS5789388A (en) Color video signal recording system and recording and reproducing system
JPH01112888A (en) Video signal recorder
JPS54105425A (en) Equalization system for time axis of video signal
JPS5586282A (en) Recording method for color video signal
JPS5564494A (en) Color video signal recorder
SU1427603A2 (en) Generator of color image test signals
JPH0346630Y2 (en)
JPS5591282A (en) Record/reproduction system for color video signal
JPS5657371A (en) Picture recorder/reproducer
JPS56144691A (en) Recording and reproduction system for color video signal