JPS5625238A - Data recording system of optical disk - Google Patents

Data recording system of optical disk

Info

Publication number
JPS5625238A
JPS5625238A JP9923379A JP9923379A JPS5625238A JP S5625238 A JPS5625238 A JP S5625238A JP 9923379 A JP9923379 A JP 9923379A JP 9923379 A JP9923379 A JP 9923379A JP S5625238 A JPS5625238 A JP S5625238A
Authority
JP
Japan
Prior art keywords
optical disk
recorded
data
data block
unrecorded
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
JP9923379A
Other languages
Japanese (ja)
Inventor
Hiroyasu Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9923379A priority Critical patent/JPS5625238A/en
Publication of JPS5625238A publication Critical patent/JPS5625238A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To make it possible to attain random access to a desired data block easily by providing an unrecorded area, equivalent to at least one track or more, to each block on an optical disk.
CONSTITUTION: On optical disk 1, the 1st data block 2, for example, is recorded to a length equivalent to two rotations of disk 1 and the 2nd data block 4, on the other hand, is recorded to a length equivalent to one rotation. The 1st and 2nd data blocks 2 and 4 are recorded being separated and between the both, unrecorded area 3 for at least one track or more is provided. Optical head 5 runs on optical disk 1 in its radius direction to reproduce data optically. Then, a data area where data have been recorded can be discriminated from the unrecorded area on the basis of the output of the optical head and the number of unrecorded areas can be counted. Therefore, random access to a desired data block can easily be attained by counting unrecorded areas 3.
COPYRIGHT: (C)1981,JPO&Japio
JP9923379A 1979-08-03 1979-08-03 Data recording system of optical disk Pending JPS5625238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9923379A JPS5625238A (en) 1979-08-03 1979-08-03 Data recording system of optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9923379A JPS5625238A (en) 1979-08-03 1979-08-03 Data recording system of optical disk

Publications (1)

Publication Number Publication Date
JPS5625238A true JPS5625238A (en) 1981-03-11

Family

ID=14241953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9923379A Pending JPS5625238A (en) 1979-08-03 1979-08-03 Data recording system of optical disk

Country Status (1)

Country Link
JP (1) JPS5625238A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053898A (en) * 1982-10-15 1991-10-01 Canon Kabushiki Kaisha Recording and/or reproducing apparatus, particularly with means for searching for vacant tracks
US6061090A (en) * 1985-10-30 2000-05-09 Canon Kabushiki Kaisha Recording and/or reproducing apparatus
US6751176B1 (en) 1997-07-15 2004-06-15 Matsushita Electric Industrial Co., Ltd. Optical disk with buffer area and recording and reproducing apparatus and methods
EP1580736A1 (en) * 2002-10-21 2005-09-28 Sony Computer Entertainment Inc. Optical disc reproduction device and optical disc reproduction method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053898A (en) * 1982-10-15 1991-10-01 Canon Kabushiki Kaisha Recording and/or reproducing apparatus, particularly with means for searching for vacant tracks
US6061090A (en) * 1985-10-30 2000-05-09 Canon Kabushiki Kaisha Recording and/or reproducing apparatus
US6751176B1 (en) 1997-07-15 2004-06-15 Matsushita Electric Industrial Co., Ltd. Optical disk with buffer area and recording and reproducing apparatus and methods
US7016281B2 (en) 1997-07-15 2006-03-21 Matsushita Electric Industrial Co., Ltd. Optical disc, its recording method, its recording device, its reproducing method, and its reproducing device
EP1580736A1 (en) * 2002-10-21 2005-09-28 Sony Computer Entertainment Inc. Optical disc reproduction device and optical disc reproduction method
EP1580736A4 (en) * 2002-10-21 2007-10-24 Sony Computer Entertainment Inc Optical disc reproduction device and optical disc reproduction method

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