JPS57109113A - Data recording method to magnetic recording medium - Google Patents

Data recording method to magnetic recording medium

Info

Publication number
JPS57109113A
JPS57109113A JP18454380A JP18454380A JPS57109113A JP S57109113 A JPS57109113 A JP S57109113A JP 18454380 A JP18454380 A JP 18454380A JP 18454380 A JP18454380 A JP 18454380A JP S57109113 A JPS57109113 A JP S57109113A
Authority
JP
Japan
Prior art keywords
magnetic
recording medium
copying
magnetization
wave
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
JP18454380A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6353605B2 (enrdf_load_stackoverflow
Inventor
Yoshiaki Makino
Shohei Mimura
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.)
Toppan Infomedia Co Ltd
Original Assignee
Tokyo Magnetic Printing 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 Tokyo Magnetic Printing Co Ltd filed Critical Tokyo Magnetic Printing Co Ltd
Priority to JP18454380A priority Critical patent/JPS57109113A/ja
Publication of JPS57109113A publication Critical patent/JPS57109113A/ja
Publication of JPS6353605B2 publication Critical patent/JPS6353605B2/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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • 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
    • G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
JP18454380A 1980-12-25 1980-12-25 Data recording method to magnetic recording medium Granted JPS57109113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18454380A JPS57109113A (en) 1980-12-25 1980-12-25 Data recording method to magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18454380A JPS57109113A (en) 1980-12-25 1980-12-25 Data recording method to magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57109113A true JPS57109113A (en) 1982-07-07
JPS6353605B2 JPS6353605B2 (enrdf_load_stackoverflow) 1988-10-25

Family

ID=16155039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18454380A Granted JPS57109113A (en) 1980-12-25 1980-12-25 Data recording method to magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57109113A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346103A (ja) * 1989-07-14 1991-02-27 Nippon Kaade Center Kk 磁気カードのリーダーライタ装置
JPH0261511U (enrdf_load_stackoverflow) * 1989-10-20 1990-05-08

Also Published As

Publication number Publication date
JPS6353605B2 (enrdf_load_stackoverflow) 1988-10-25

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