JPS5627577A - Time-axis-variation correction unit - Google Patents

Time-axis-variation correction unit

Info

Publication number
JPS5627577A
JPS5627577A JP10224379A JP10224379A JPS5627577A JP S5627577 A JPS5627577 A JP S5627577A JP 10224379 A JP10224379 A JP 10224379A JP 10224379 A JP10224379 A JP 10224379A JP S5627577 A JPS5627577 A JP S5627577A
Authority
JP
Japan
Prior art keywords
voltage
phase detector
skew
signal
circuit
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
JP10224379A
Other languages
Japanese (ja)
Inventor
Yoshizumi Wataya
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10224379A priority Critical patent/JPS5627577A/en
Publication of JPS5627577A publication Critical patent/JPS5627577A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/95—Time-base error compensation
    • H04N5/953—Time-base error compensation by using an analogue memory, e.g. a CCD shift register, the delay of which is controlled by a voltage controlled oscillator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To correct skew distortion securely by holding a voltage that corresponds to the quantity of skew after detecting the skew quantity by a phase detector and by controlling a voltage control oscillator for driving a charge transfer element by the held voltage. CONSTITUTION:A reproduced signal from terminal 1 is separated by synchronous separating circuit 2 into a horizontal synchronizing signal, which has its phase shift detected by phase detector 3. Then, since phase detector 3, filter circuit 4 and voltage control oscillator 5 constitute an AFC circuit, a voltage that correspond to a skew quantity is developed at the output of phase detector 3. The 1st peak value of the output signal voltage of this phase detector 3 is held by voltage holding circuit 9 by use of a signal from head switching signal input terminal 10. Further, voltage control oscillator 6 that drives charge transfer element 7 is controlled by the output signal of this voltage holding circuit 9.
JP10224379A 1979-08-13 1979-08-13 Time-axis-variation correction unit Pending JPS5627577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10224379A JPS5627577A (en) 1979-08-13 1979-08-13 Time-axis-variation correction unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10224379A JPS5627577A (en) 1979-08-13 1979-08-13 Time-axis-variation correction unit

Publications (1)

Publication Number Publication Date
JPS5627577A true JPS5627577A (en) 1981-03-17

Family

ID=14322170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10224379A Pending JPS5627577A (en) 1979-08-13 1979-08-13 Time-axis-variation correction unit

Country Status (1)

Country Link
JP (1) JPS5627577A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936487A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Magnetic reproducer
JPS59100208A (en) * 1982-11-30 1984-06-09 エイ・フインクル　アンド　サンズ　コンパニ− Steeling process and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936487A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Magnetic reproducer
JPH0363273B2 (en) * 1982-08-24 1991-09-30 Matsushita Electric Ind Co Ltd
JPS59100208A (en) * 1982-11-30 1984-06-09 エイ・フインクル　アンド　サンズ　コンパニ− Steeling process and apparatus
JPH0253483B2 (en) * 1982-11-30 1990-11-16 Ee Fuinkuru Ando Sanzu Co

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