JPS5760787A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS5760787A
JPS5760787A JP55135599A JP13559980A JPS5760787A JP S5760787 A JPS5760787 A JP S5760787A JP 55135599 A JP55135599 A JP 55135599A JP 13559980 A JP13559980 A JP 13559980A JP S5760787 A JPS5760787 A JP S5760787A
Authority
JP
Japan
Prior art keywords
inputted
switch
digital information
bit length
picture information
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
JP55135599A
Other languages
Japanese (ja)
Inventor
Koichi Ogawa
Shigeru Arai
Akira Minami
Seiya Ogawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55135599A priority Critical patent/JPS5760787A/en
Publication of JPS5760787A publication Critical patent/JPS5760787A/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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To perform recording and reproducing of a very low error occurrence rate, by setting the bit length of digital information required for retrieval of picture information to an integral multiple of the bit length of picture information. CONSTITUTION:Digital information is inputted from A to a shift register 1, and the parallel signal is converted to a series signal and is sent to a switch 5. Meanwhile, digitized picture information is inputted from B to a shift register, and the parallel signal is converted to a series signal and is sent to the switch 5 The switch 5 switches and sends picture information and digital information to an optical modulator 6 and modulates the laser beam applied from D to record them onto an optical disc 7. When the frequency of a clock pulse CLOCK inputted to registers 1 and 3 is denoted as f0, the frequency of the pulse inputted to the register 1 becomes f0/n (n is an integer) through an FF2. Consequently, since the bit length of digital information inputted to the switch 5 is (n) times as long as the bit length of picture information, digital information is recorded and reproduced in a low error occurrence rate.
JP55135599A 1980-09-29 1980-09-29 Optical recording and reproducing device Pending JPS5760787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135599A JPS5760787A (en) 1980-09-29 1980-09-29 Optical recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135599A JPS5760787A (en) 1980-09-29 1980-09-29 Optical recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5760787A true JPS5760787A (en) 1982-04-12

Family

ID=15155580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135599A Pending JPS5760787A (en) 1980-09-29 1980-09-29 Optical recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5760787A (en)

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