JPS5642475A - Magnetic video recording and reproducing device - Google Patents

Magnetic video recording and reproducing device

Info

Publication number
JPS5642475A
JPS5642475A JP11851379A JP11851379A JPS5642475A JP S5642475 A JPS5642475 A JP S5642475A JP 11851379 A JP11851379 A JP 11851379A JP 11851379 A JP11851379 A JP 11851379A JP S5642475 A JPS5642475 A JP S5642475A
Authority
JP
Japan
Prior art keywords
mode
ntsc
reproduced
control signal
pal
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
JP11851379A
Other languages
Japanese (ja)
Inventor
Tadashi Yoshino
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 JP11851379A priority Critical patent/JPS5642475A/en
Publication of JPS5642475A publication Critical patent/JPS5642475A/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
    • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
    • H04N9/7925—Processing of colour television signals in connection with recording for more than one processing mode for more than one standard
    • 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
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback

Landscapes

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

Abstract

PURPOSE:To make it possible to change the reproduction mode over to the recording mode automatically by judging by the frequency of a reproduced control signal whether recording has been done in NTSC mode or PAL mode. CONSTITUTION:The turning speed of capstan 1 is detected by the frequency generator consisting of gear 6 and magnetic head 7, amplified 8 and then applied to NTSC and PAL mode speed detecting circuits 9 and 10. A control signal reproduced by control head 5 is applied to Schmitt trigger circuit 18 by way of voltage converting circuit 17 to generate trigger signals of hysteresis characteristics with the 1st and 2nd threshold voltages, thereby controlling change-over switches 11 and 15. As a result, when a magnetic tape recorded in NTSC mode is reproduced in PAL mode, the period of the reproduced control signal exceeds the 1st threshold level and switches 11 and 15 are controlled by outputting an NTSC mode signal to place them at the sides of circuit 9 and NTSC reference signal generator 13, thereby increasing the speed of motor 1.
JP11851379A 1979-09-13 1979-09-13 Magnetic video recording and reproducing device Pending JPS5642475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11851379A JPS5642475A (en) 1979-09-13 1979-09-13 Magnetic video recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11851379A JPS5642475A (en) 1979-09-13 1979-09-13 Magnetic video recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5642475A true JPS5642475A (en) 1981-04-20

Family

ID=14738485

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11851379A Pending JPS5642475A (en) 1979-09-13 1979-09-13 Magnetic video recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5642475A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095247A2 (en) * 1982-04-23 1983-11-30 Sony Corporation Apparatus for recording an information signal, with a control track, on a record medium
JPS61175953A (en) * 1985-01-30 1986-08-07 Hitachi Ltd Magnetic recording and reproducing device
GB2362025B (en) * 1999-11-29 2003-10-22 Matsushita Electric Ind Co Ltd Information recorder/reproducer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095247A2 (en) * 1982-04-23 1983-11-30 Sony Corporation Apparatus for recording an information signal, with a control track, on a record medium
US4549224A (en) * 1982-04-23 1985-10-22 Sony Corporation Digital video tape recorder that can be used with different television systems
JPS61175953A (en) * 1985-01-30 1986-08-07 Hitachi Ltd Magnetic recording and reproducing device
GB2362025B (en) * 1999-11-29 2003-10-22 Matsushita Electric Ind Co Ltd Information recorder/reproducer

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