Method of controlling recording information on an optical disk using replacement control information
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 28, 1998
Grant Date -
N/A
app pub date -
Dec 18, 1995
filing date -
Dec 19, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Information is recorded on a rewritable optical disk apparatus in accordance with the second generation 5 inch rewritable-type optical disks standards that provide for reusing once-defective user blocks. Such disks have a user data recording region, a replacement recording region and a replacement control information recording region in which a table of information linking defective blocks in the user data recording region with replacement blocks in the replacement recording region is stored. Continuity of the distribution of the replacement recording blocks is maintained by treatment of replacement blocks that become unnecessary. Unnecessary replacement blocks are ones that are not used for storing data because of the subsequent successful recording of data in once defective user blocks to which the replacement blocks were previously linked. Such unnecessary replacement blocks are treated as being defective if a following assigned replacement block exists in the replacement block recording region and they are used in links with other defective user blocks and assigned replacement blocks. In addition to maintaining continuous distribution of the replacement blocks as required by the second generation standard, fewer replacement blocks are required to be used.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully