Back to results
US 6,788,642 B2Granted
Optical recording medium having unrecordable restricted block(s), and systems incorporating same
AssigneeHitachi, Ltd.
InventorsAkeimi Hirotsune, Harukazu Miyamoto, Yoshiko Nishi
Life of this patent
Estimating the term…
Abstract
In a medium having a restriction on its function, which has a extremely low overwrite cyclability as compared with a common one, information is arranged so as to allow restricted write and read operations in a commonly used current write and read drive, i.e., the medium is subjected to specific formatting. It is possible to perform write and read operations with security. The specific format can be performed with parameters taking into consideration special-purpose use conditions (i.e., overwrite cyclability). Consequently, it becomes possible to provide a low-priced information recording medium.
Claims20
An information recording medium, comprising:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- ones of the recording blocks having physical address data arranged thereon, the physical address data being made up of a code indicative of an address number and an address error detection code for verifying the correctness of the address number,
- wherein the code indicative of the address number is mismatched with the address error detection code for verifying the correctness of the address number in the restricted block.
The information recording medium according to An information recording medium, comprising:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- ones of the recording blocks having physical address data arranged thereon, the physical address data being made up of a code indicative of an address number and an address error detection code for verifying the correctness of the address number,
- wherein the address number indicated by the physical address data is different from the address number of the restricted block in the restricted block.
An information recording medium, comprising:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- wherein the user recording block is an error correction code block including a plurality of user sectors,
- wherein the user sectors individually have independent address numbers, and all the user recording blocks to which the user sectors having the smallest 257 numbers of the address numbers belong are at least unrecordable, restricted blocks.
An information recording medium, comprising:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- wherein a total number of the restricted blocks on the information recording medium is set to be larger than a total number of the recording blocks registrable in a defect management table.
A system comprising:
- an information recording medium drive having mechanical components to at least one of:
- produce, read and write an information recording medium having at least one restricted block;
- and
- at least one information recording medium including:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- ones of the recording blocks having physical address data arranged thereon, the physical address data being made up of a code indicative of an address number and an address error detection code for verifying the correctness of the address number,
- wherein the code indicative of the address number is mismatched with the address error detection code for verifying the correctness of the address number in the restricted block.
4 more elements
A system comprising:
- an information recording medium drive having mechanical components to at least one of:
- produce, read and write an information recording medium having at least one restricted block;
- and
- at least one information recording medium including:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- ones of the recording blocks having physical address data arranged thereon, the physical address data being made up of a code indicative of an address number and an address error detection code for verifying the correctness of the address number,
- wherein the address number indicated by the physical address data is different from the address number of the restricted block in the restricted block.
4 more elements
A system comprising:
- an information recording medium drive having mechanical components to at least one of:
- produce, read and write an information recording medium having at least one restricted block;
- and
- at least one information recording medium including:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- wherein the user recording block is an error correction code block including a plurality of user sectors,
- wherein the user sectors individually have independent address numbers, and all the user recording blocks to which the user sectors having the smallest 257 numbers of the address numbers belong are at least unrecordable restricted blocks.
4 more elements
A system comprising:
- an information recording medium drive having mechanical components to at least one of:
- produce, read and write an information recording medium having at least one restricted block;
- and
- at least one information recording medium including:
- at least two blocks of independently writable user recording blocks, and at least one block of the user recording blocks being an unrecordable restricted block;
- wherein a total number of the restricted blocks on the information recording medium is set to be larger than a total number of the recording blocks registrable in a defect management table.
3 more elements
Dependencies are inferred from the claim text.