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US 7,397,744 B2Granted
Recording and/or reproducing method and apparatus
AssigneeSony Corporation
InventorsMitsutoshi Terada, Shoei Kobayashi, Tomotaka Kuraoka
Life of this patent
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AssigneeSony Corporation
InventorsMitsutoshi Terada, Shoei Kobayashi, Tomotaka Kuraoka
Estimating the term…
In a write-once recording medium, an optimum updating of the management information and a simple matching processing are to be achieved. To this end, in a system of a write-once medium, rendered accessible at random by employing the write/non-write indicating information, the management information, including a space bitmap and the last recording position information (LRA) indicating the last position of the recorded user data, is updated on the disc responsive to the generation or extinction of a gap (unrecorded area) in a region ahead of the LRA. The state of matching between the management information on the disc and the recording state of the user data is confirmed, responsive to the updating of the management information on the disc by the generation or extinction of the gap in the management information, by detecting whether or not the gap in the management information (gap indicated by the space bitmap) or the LRA is coincident with the gap or the LRA on the actual disc. Lacking the matching, the management information is updated to match the space bitmap or the LRA.
A recording and/or reproducing apparatus for a recording medium in a write-once recording area of which allowing for writing data once the management information and the user data are recorded, and in which the written/unwritten indicating information indicating whether data has been written in each data unit in at least an area for recording said user data and the last recording position information indicating the last position of recording of the recorded user data are recorded as said management information, said apparatus comprising:
A recording and/or reproducing method for a recording medium in a write-once recording area of which allowing for writing data once the management information and the user data are recorded, and in which the written/unwritten indicating information indicating whether data has been written in each data unit in at least an area for recording said user data and the last recording position information indicating the last position of recording of the recorded user data, are recorded as said management information, said method comprising:
Dependencies are inferred from the claim text.