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.
Claims13
A method comprising:
- submitting fixed sized packets of user information for recording, the packets having a minimum packet size,
- allocating the packets to sectors in a data area in a spiral track on a disc, the sectors having a minimum addressable sector size that is smaller than the minimum packet size, wherein the allocating includes reallocating defect areas to replacements areas in a spare area on the disc, the size of the replacement areas being substantially smaller than the minimum packet size, and
- recording the packets in the sectors to which they are allocated and reallocated on the disc along the spiral track.
Recording apparatus comprising:
- an input for receiving signals representing fixed sized packets of user information, the packets having a minimum packet size,
- means for allocating the packets to sectors in a data area in a spiral track on a disc, the sectors having a minimum addressable sector size smaller than the minimum packet size,
- defect management means for reallocating defect areas to replacement areas in a spare area on the disc;
- the size of the replacement areas being substantially smaller than the minimum packet size,
- means for recording the packets of signals in sectors to which they are allocated and reallocated along the spiral track on the disc.
Dependencies are inferred from the claim text.