Method of immediate writing or reading files on a disc like recording medium
AssigneeKoninklijke Philips Electronics N.V.
InventorsPope Ijtsma, Dirk Hamelinck
Life of this patent
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Abstract
A method of recording digital information signals on a removable rewritable disc like recording medium, the method comprising recording user data on a logical area of the disc and, prior to removal of the disc out of a recording/reproducing apparatus, finalizing the disc with a lead-in and lead-out area comprising predefined medium format data. A general purpose area within the logical area for other use than recording of user data, is being reserved. Such as use may be for example defect management. Further the method involves interrupting recording a lead-in area or a lead-out area at predefined splice points whenever a request for user data is made.
Claims10
A method of recording digital information on a removable disc like recording medium, such as on optical disc, the method comprising:
- submitting fixed sized packets of user information for recording on the disc, the packets having a minimum packet size,
- allocating said packets to continuous sectors on the disc in a data area, said sectors having a minimum addressable sector size smaller than the minimum packet size, wherein said allocating comprises reallocating defect areas to a spare area on the disc, and
- recording said packets on the disc along a spiral track,
- characterized by,
- reallocating defect areas by a replacement area in a spare area, the size of the replacement area being substantially smaller than the minimum packet size.
An apparatus for recording digital information signals on a removable disc like recording medium, such as an optical disc, the apparatus comprising:
- input means for receiving signals representing fixed sized packets of user information for recording on the disc, the packets having a minimum packet size,
- allocating means for allocating said packets to continuous sectors on the disc in a data area, said sectors having a minimum addressable sector size smaller than the minimum packet size,
- defect management means for reallocating defect areas to a spare area on the disc,
- recording means for recording the signals representing user data along a spiral track on the disc,
- characterized in that,
- the defect management means are adapted to reallocate defect areas by a replacement area in the spare area, the size of the replacement area being substantially smaller than the minimum packet size.
Dependencies are inferred from the claim text.