JPS5625238A - Data recording system of optical disk - Google Patents
Data recording system of optical diskInfo
- 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
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
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)
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 |
-
1979
- 1979-08-03 JP JP9923379A patent/JPS5625238A/en active Pending
Cited By (6)
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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