JPS57195320A - Wow and flutter canceling device of rotary head type vtr - Google Patents

Wow and flutter canceling device of rotary head type vtr

Info

Publication number
JPS57195320A
JPS57195320A JP56079070A JP7907081A JPS57195320A JP S57195320 A JPS57195320 A JP S57195320A JP 56079070 A JP56079070 A JP 56079070A JP 7907081 A JP7907081 A JP 7907081A JP S57195320 A JPS57195320 A JP S57195320A
Authority
JP
Japan
Prior art keywords
wow
flutter
rotary drum
weight
inputted
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
JP56079070A
Other languages
Japanese (ja)
Inventor
Kenichi Hosoi
Yasumasa Kyodo
Fujio Kasashima
Yoshinari Onozawa
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 JP56079070A priority Critical patent/JPS57195320A/en
Publication of JPS57195320A publication Critical patent/JPS57195320A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • G11B20/225—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions for reducing wow or flutter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Landscapes

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

Abstract

PURPOSE:To prevent a wow and a flutter effectively by detecting the position where a wow and flutter component detected by a fixed sound head has a maximum value from the wow and flutter component, and fitting a weight body having prescribed weight at a position on a rotary drum which corresponds to said position. CONSTITUTION:A PG signal detected by a PG head 11 is applied to a waveform forming circuit 12, which generates a gate signal for every turn of a rotary drum. This gate signal is divided by the number of tap holes of the rotary drum to generate (n) pieces (n=8 in this case) of sampling pulses. On the other hand, the playback signal of several KHz from a sound head 14 is inputted through an amplifier 15, a limiter 16, a frequency discriminator 17, a sampler 18, and an A/D converter 19 to an arithmetic processing circuit 20, whose output is inputted to a display device 21. A counter 22 counts the maximum level of the output voltage of the discriminator 17 and then sends its count information to the display device 21. Therefore, address number information on a wow and a flutter is inputted to the display device 21 to display what tap hole of the rotary drum a weight should be screwed into and how heavy the weight should be.
JP56079070A 1981-05-25 1981-05-25 Wow and flutter canceling device of rotary head type vtr Pending JPS57195320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079070A JPS57195320A (en) 1981-05-25 1981-05-25 Wow and flutter canceling device of rotary head type vtr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079070A JPS57195320A (en) 1981-05-25 1981-05-25 Wow and flutter canceling device of rotary head type vtr

Publications (1)

Publication Number Publication Date
JPS57195320A true JPS57195320A (en) 1982-12-01

Family

ID=13679617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079070A Pending JPS57195320A (en) 1981-05-25 1981-05-25 Wow and flutter canceling device of rotary head type vtr

Country Status (1)

Country Link
JP (1) JPS57195320A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070915U (en) * 1983-10-18 1985-05-20 三洋電機株式会社 rotating head cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070915U (en) * 1983-10-18 1985-05-20 三洋電機株式会社 rotating head cylinder
JPH0320901Y2 (en) * 1983-10-18 1991-05-07

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