JPS5619281A - Video tape recorder - Google Patents

Video tape recorder

Info

Publication number
JPS5619281A
JPS5619281A JP9442479A JP9442479A JPS5619281A JP S5619281 A JPS5619281 A JP S5619281A JP 9442479 A JP9442479 A JP 9442479A JP 9442479 A JP9442479 A JP 9442479A JP S5619281 A JPS5619281 A JP S5619281A
Authority
JP
Japan
Prior art keywords
tape
count value
signal
field
heads
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
JP9442479A
Other languages
Japanese (ja)
Inventor
Masao Tomita
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 JP9442479A priority Critical patent/JPS5619281A/en
Publication of JPS5619281A publication Critical patent/JPS5619281A/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
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/783—Adaptations for reproducing at a rate different from the recording rate

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

PURPOSE:To reduce the noise band appearing on the reproduced screen, by driving the head repetivively in several times within one field in case the tape is reproduced in a higher speed than the recording. CONSTITUTION:If it is supposed that the control signal is at the lowest position of each track on the tape, counter 3 is reset at that point with the count value of 0. After this, the count value is increased by the pulse of clock signal generator 2 and then reset again to 0 with the next control pulse. This count value receives D/A conversion 4 to obtain the saw-tooth wave signal within one field. This signal is applied to piezoelectric elements 10a and 10b attached to heads 11a and 11b and via control signal supply circuit 5 which is controlled by the head switch signal. And heads 11a and 11b give the tracing to several tracks having the azimuths coinciding with each other to form one field. Accordingly, the noise band is eliminated or reduced although the tape is run in a higher speed for reproduction than the recording.
JP9442479A 1979-07-25 1979-07-25 Video tape recorder Pending JPS5619281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9442479A JPS5619281A (en) 1979-07-25 1979-07-25 Video tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9442479A JPS5619281A (en) 1979-07-25 1979-07-25 Video tape recorder

Publications (1)

Publication Number Publication Date
JPS5619281A true JPS5619281A (en) 1981-02-23

Family

ID=14109839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9442479A Pending JPS5619281A (en) 1979-07-25 1979-07-25 Video tape recorder

Country Status (1)

Country Link
JP (1) JPS5619281A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6148278A (en) * 1984-08-15 1986-03-08 Canon Inc Rotary head type reproducing device
JPS61237583A (en) * 1985-04-12 1986-10-22 Pioneer Electronic Corp Magnetic recording and reproducing device of helical scan type

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS499919A (en) * 1972-05-22 1974-01-29
JPS5369618A (en) * 1976-12-02 1978-06-21 Sony Corp Automatic tracking apparatus
JPS53146528A (en) * 1977-05-26 1978-12-20 Sony Corp Automatic tracking device
JPS5460522A (en) * 1977-10-24 1979-05-16 Sony Corp Reproducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS499919A (en) * 1972-05-22 1974-01-29
JPS5369618A (en) * 1976-12-02 1978-06-21 Sony Corp Automatic tracking apparatus
JPS53146528A (en) * 1977-05-26 1978-12-20 Sony Corp Automatic tracking device
JPS5460522A (en) * 1977-10-24 1979-05-16 Sony Corp Reproducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6148278A (en) * 1984-08-15 1986-03-08 Canon Inc Rotary head type reproducing device
JPS61237583A (en) * 1985-04-12 1986-10-22 Pioneer Electronic Corp Magnetic recording and reproducing device of helical scan type

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