Defective sector determination device and optical disk drive
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMakoto Okazaki, Yasushi Ueda
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Abstract
To provide an optical disk drive having an enhanced replaying capability in case of an abnormality occurring in various kinds of synchronization of the optical disk drive or in replay of a defective sector. A frame synchronization counter value address translation decoder, low order ID address translation decoder, adder/subtracter, high order ID address translation decoder, and adder are used to translate information read from an optical disk medium into an absolute storage address in a storage medium, and thus data that is highly replayed can be stored in the storage medium.
Claims8
In readout from a rewritable optical disk medium storing sector physical address information that is a physical address of a sector besides sector logical address information included in data,
- a defective sector determination device, characterized in that the defective sector determination device comprises:
- continuity detection means of detecting a position where a difference occurs between the continuity of said sector physical address information and the continuity of said sector logical address information;
- defective sector detection means of finding a defective sector using said detected difference;
- and
- informing means of informing an external control means of said detected defective sector.
Dependencies are inferred from the claim text.