JPS5720084A - Magnetic video recording and reproducing device - Google Patents

Magnetic video recording and reproducing device

Info

Publication number
JPS5720084A
JPS5720084A JP9539380A JP9539380A JPS5720084A JP S5720084 A JPS5720084 A JP S5720084A JP 9539380 A JP9539380 A JP 9539380A JP 9539380 A JP9539380 A JP 9539380A JP S5720084 A JPS5720084 A JP S5720084A
Authority
JP
Japan
Prior art keywords
circuit
afc
signal
oscillator
color
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
JP9539380A
Other languages
Japanese (ja)
Other versions
JPH0140555B2 (en
Inventor
Kenji Baba
Akira Miyamoto
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 JP9539380A priority Critical patent/JPS5720084A/en
Publication of JPS5720084A publication Critical patent/JPS5720084A/en
Publication of JPH0140555B2 publication Critical patent/JPH0140555B2/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
    • H04N9/87—Regeneration of colour television signals
    • H04N9/89—Time-base error compensation

Abstract

PURPOSE:To stabilize instantly the time axis of a reproduced color signal which is fluctuating in the time axis, by providing a magnetic video recording and reproducing device with a circuit which detects the discontinuation of time intervals of a horizontal synchronizing signal and by controlling the variable frequency oscillator of a color AFC circuit. CONSTITUTION:A luminance signal in a color video signal reproduced by a video head 11 is extracted as a horizontal synchronizing signal by using an FM modulator 12 and a synchronous separating circuit 13 and supplied to an AFC circuit. This circuit consists of an AFC detecting circuit 14, a variable frequency oscillator 15, a 1/4 frequency dividing circuit 16, and a 1/40 frequency dividing circuit 17 and controls the oscillation frequency of the oscillator 15 by using the output of a detecting circuit 19 for the discontinuation of the horizontal synchronizing signal connected to the circuit 13, thereby preventing the defective acquisition of synchronism of the AFC circuit. In the AFC circuit, on the other hand, a reproduced burst signal from a burst gate circuit 21 is supplied to an AFC detecting circuit 22 to be compared with the signal of a color reference oscillator 23 in terms of phase, and a voltage which corresponds to the phase difference is applied to the 2nd variable frequency oscillator 24 to be supplied to a frequency converter 20 while following up the phase of an oscillator 23.
JP9539380A 1980-07-11 1980-07-11 Magnetic video recording and reproducing device Granted JPS5720084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9539380A JPS5720084A (en) 1980-07-11 1980-07-11 Magnetic video recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9539380A JPS5720084A (en) 1980-07-11 1980-07-11 Magnetic video recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5720084A true JPS5720084A (en) 1982-02-02
JPH0140555B2 JPH0140555B2 (en) 1989-08-29

Family

ID=14136399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9539380A Granted JPS5720084A (en) 1980-07-11 1980-07-11 Magnetic video recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5720084A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6188388U (en) * 1984-11-13 1986-06-09

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138334A (en) * 1978-04-20 1979-10-26 Sony Corp Frequency control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138334A (en) * 1978-04-20 1979-10-26 Sony Corp Frequency control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6188388U (en) * 1984-11-13 1986-06-09

Also Published As

Publication number Publication date
JPH0140555B2 (en) 1989-08-29

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