JPS56136091A - Afc circuit - Google Patents

Afc circuit

Info

Publication number
JPS56136091A
JPS56136091A JP3944480A JP3944480A JPS56136091A JP S56136091 A JPS56136091 A JP S56136091A JP 3944480 A JP3944480 A JP 3944480A JP 3944480 A JP3944480 A JP 3944480A JP S56136091 A JPS56136091 A JP S56136091A
Authority
JP
Japan
Prior art keywords
skew
counter
head
reproduced horizontal
extent
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
JP3944480A
Other languages
Japanese (ja)
Inventor
Shinji Takada
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 JP3944480A priority Critical patent/JPS56136091A/en
Publication of JPS56136091A publication Critical patent/JPS56136091A/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

Landscapes

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

Abstract

PURPOSE:To shorten a lock-in time after skew generation, by resetting a step-down counter, constituting a PLL circuit or by changing its preset value to another value according to the extent of the skew. CONSTITUTION:If a reproduced horizontal synchronizing signal from head A and that from head B differ in pulse interval owing to the skew generated in switching heads of VTR, reproduced horizontal signals before and after the head switching are supplied to counter 2, which is forced to reset. As a result, counter 2 generates a synchronous output in the same time series with the reproduced horizontal synchronizing signal. In this case, a fixed phase error occurs, but can be suppressed low. In addition, the same effect can be obtained by supplying a preset value to the counter according to the extent of the skew.
JP3944480A 1980-03-27 1980-03-27 Afc circuit Pending JPS56136091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3944480A JPS56136091A (en) 1980-03-27 1980-03-27 Afc circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3944480A JPS56136091A (en) 1980-03-27 1980-03-27 Afc circuit

Publications (1)

Publication Number Publication Date
JPS56136091A true JPS56136091A (en) 1981-10-23

Family

ID=12553183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3944480A Pending JPS56136091A (en) 1980-03-27 1980-03-27 Afc circuit

Country Status (1)

Country Link
JP (1) JPS56136091A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282242A2 (en) * 1987-03-09 1988-09-14 Pioneer Electronic Corporation A phase synchronizing circuit for a time axis shift correcting circuit
JPH066758A (en) * 1992-02-11 1994-01-14 Internatl Business Mach Corp <Ibm> Signal processor for correcting distortion of display image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282242A2 (en) * 1987-03-09 1988-09-14 Pioneer Electronic Corporation A phase synchronizing circuit for a time axis shift correcting circuit
JPH066758A (en) * 1992-02-11 1994-01-14 Internatl Business Mach Corp <Ibm> Signal processor for correcting distortion of display image

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