Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-04-10
2007-04-10
Hindi, Nabil (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S053150
Reexamination Certificate
active
10514067
ABSTRACT:
The present invention allows the usability of a write-once recording medium to be enhanced. The write-once recording medium is provided with an ordinary recording/reproduction area, an alternate area, a first alternate-address management information area (DMA) and a second alternate-address management information area (TDMA). In addition, written/unwritten state indication information (a space bitmap) is also recorded. The second alternate-address management information area is an area allowing alternate-address management information recorded therein to be renewed by adding alternate-address management information thereto. In addition, the written/unwritten state indication information indicates whether or not data has been recorded in each data unit (cluster) on the recording medium. Thus, it is possible to correctly execute management of defects and properly implement renewal of data in the write-once recording medium.
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Kobayashi Shoei
Kuraoka Tomotaka
Terada Mitsutoshi
Hindi Nabil
Sony Corporation
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