JPS6476560A - Optical memory card - Google Patents

Optical memory card

Info

Publication number
JPS6476560A
JPS6476560A JP23255387A JP23255387A JPS6476560A JP S6476560 A JPS6476560 A JP S6476560A JP 23255387 A JP23255387 A JP 23255387A JP 23255387 A JP23255387 A JP 23255387A JP S6476560 A JPS6476560 A JP S6476560A
Authority
JP
Japan
Prior art keywords
recording density
information
data
medium identification
identification 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.)
Granted
Application number
JP23255387A
Other languages
Japanese (ja)
Other versions
JP2506121B2 (en
Inventor
Tadashi Miyazaki
Kazuhiro Koyama
Shigeo Kikuta
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62232553A priority Critical patent/JP2506121B2/en
Publication of JPS6476560A publication Critical patent/JPS6476560A/en
Application granted granted Critical
Publication of JP2506121B2 publication Critical patent/JP2506121B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To surely read information even when cards are used whose recording density of data parts are different individual cards are used by providing a medium identification information information part in which the information of the recording density of the data part is recorded before the data part of an information storage part. CONSTITUTION:The information storage part 2 is constituted of the medium identification information part 3, the data part 4, and furthermore, a gap part 5 between them. And the recording density of the data part 4 at least following the medium identification information part 3 is stored in the medium identification information part 3 so as to be read surely by a card reader in spite of the recording density of the data part 4. In such a way, it is possible to recognize the recording density of the data part 4 by the reader, and to read the information by the reader surely even when optical cards 1 with different recording density in the data parts 4 are used.
JP62232553A 1987-09-18 1987-09-18 Optical memory card system Expired - Lifetime JP2506121B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62232553A JP2506121B2 (en) 1987-09-18 1987-09-18 Optical memory card system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62232553A JP2506121B2 (en) 1987-09-18 1987-09-18 Optical memory card system

Publications (2)

Publication Number Publication Date
JPS6476560A true JPS6476560A (en) 1989-03-22
JP2506121B2 JP2506121B2 (en) 1996-06-12

Family

ID=16941129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62232553A Expired - Lifetime JP2506121B2 (en) 1987-09-18 1987-09-18 Optical memory card system

Country Status (1)

Country Link
JP (1) JP2506121B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009301705A (en) * 1995-06-29 2009-12-24 Lg Electronics Inc Recording medium and information reproducing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5916113A (en) * 1982-07-19 1984-01-27 Hitachi Ltd Reading system of magnetic information
JPS5977606A (en) * 1982-10-25 1984-05-04 Sony Corp Reproducing device of digital disc
JPS62145590A (en) * 1985-12-19 1987-06-29 Dainippon Printing Co Ltd Recording method for optical digital data
JPS6355777A (en) * 1986-08-26 1988-03-10 Canon Inc Information recording and reproducing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5916113A (en) * 1982-07-19 1984-01-27 Hitachi Ltd Reading system of magnetic information
JPS5977606A (en) * 1982-10-25 1984-05-04 Sony Corp Reproducing device of digital disc
JPS62145590A (en) * 1985-12-19 1987-06-29 Dainippon Printing Co Ltd Recording method for optical digital data
JPS6355777A (en) * 1986-08-26 1988-03-10 Canon Inc Information recording and reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009301705A (en) * 1995-06-29 2009-12-24 Lg Electronics Inc Recording medium and information reproducing method

Also Published As

Publication number Publication date
JP2506121B2 (en) 1996-06-12

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