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JPS576460A - Digital signal recording and reproducing device - Google Patents

Digital signal recording and reproducing device

Info

Publication number
JPS576460A
JPS576460A JP8204980A JP8204980A JPS576460A JP S576460 A JPS576460 A JP S576460A JP 8204980 A JP8204980 A JP 8204980A JP 8204980 A JP8204980 A JP 8204980A JP S576460 A JPS576460 A JP S576460A
Authority
JP
Japan
Prior art keywords
signal
circuit
synchronizing
case
recording carrier
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.)
Granted
Application number
JP8204980A
Other languages
Japanese (ja)
Other versions
JPH028385B2 (en
Inventor
Masaru Kawabata
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8204980A priority Critical patent/JPS576460A/en
Publication of JPS576460A publication Critical patent/JPS576460A/en
Publication of JPH028385B2 publication Critical patent/JPH028385B2/ja
Granted 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To smoothly execute an acquisition of synchronization in case of controlling the running of a recording carrier by a pseudo servo-pulse from a frame synchronizing signal, by making this device execute the same operation as a regular phase synchronizing control in an asynchronous state of a control system. CONSTITUTION:A signal from a synchronizing signal detecting circuit 4 is inputted to a pseudo servo-pulse generating circuit 5, and it is provided to a PLL7 through a selecting circuit 16, and compared with a signal of a reference signal generating circuit 1, and it controls a relative speed of a reproducing head 3 and a recording carrier 2. In this case, a signal of the synchronizing signal detecting circuit 4 is inputted to a signal record detecting circuit 9 containing a counter 20, a flip-flop 19, a one-shot multivibrator 21, a gate circuit 8 is controlled, and also the selecting circuit 16 is controlled through a one-shot multivibrator 15. Accordingly, an acquisition of synchronization in case a control system enters a synchronizing state from an asynchronous state in the course of running of the recording carrier 2 is executed without delay, and the bit rate of a digital signal is kept exactly.
JP8204980A 1980-06-13 1980-06-13 Digital signal recording and reproducing device Granted JPS576460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8204980A JPS576460A (en) 1980-06-13 1980-06-13 Digital signal recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8204980A JPS576460A (en) 1980-06-13 1980-06-13 Digital signal recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS576460A true JPS576460A (en) 1982-01-13
JPH028385B2 JPH028385B2 (en) 1990-02-23

Family

ID=13763647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8204980A Granted JPS576460A (en) 1980-06-13 1980-06-13 Digital signal recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS576460A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01217243A (en) * 1988-02-26 1989-08-30 Hitachi Ltd Method and apparatus for detecting foreign matter
JPH0238951A (en) * 1988-07-29 1990-02-08 Hitachi Ltd Device and method for foreign matter detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01217243A (en) * 1988-02-26 1989-08-30 Hitachi Ltd Method and apparatus for detecting foreign matter
JPH0238951A (en) * 1988-07-29 1990-02-08 Hitachi Ltd Device and method for foreign matter detection

Also Published As

Publication number Publication date
JPH028385B2 (en) 1990-02-23

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