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AssigneeKoninklijke Philips Electronics N.V.
InventorsGusbert J. Van Der Enden, Antonius P.G.E. Janssen, Arnoldus J. Niessen, Cornelis Teunissen, Franz H.U. Frank
Estimating the term…
Reading a partly written writable record carrier having a track structure for positioning the write head above unwritten areas of the track pattern by means of a reading device which positions the read head on the basis of written marks, yields problems when an isolated information block after an unwritten area must be read. A system is disclosed for writing and reading information blocks on a record carrier of a writable type such as a CD-RW or a DVD-RAM. The writing device is provided with status means for generating status information which is indicative of the fact that at least one area of the record carrier has been written, while the status information comprises initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks. The status information can be fixed on the record carrier. A reading device is also described, in which the positioning is dependent on the status information. Reading instructions with addresses outside the initial area can be rejected or translated via an address translation table into addresses in the initial area.
A device for writing information blocks in a track pattern on a record carrier of a writable type, which device is provided with a write unit for writing areas of the record carrier via a beam of electromagnetic radiation with marks representing the information blocks, and positioning means for positioning the write unit on the record carrier on the basis of a track structure which is indicative of the track pattern, characterized in that the device is provided with status means for generating status information which is indicative of the fact that at least one area of the record carrier has been written, the status information comprising initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks.
A writable record carrier having a track pattern for writing information blocks, and a track structure which is indicative of the track pattern, characterized in that the record carrier is provided with status information which is indicative of the fact that at least one area of the record carrier has been written, the status information comprising initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks.
A method of writing information blocks in a track pattern on a record carrier of a writable type, in which method marks representing the information blocks are written in areas of the record carrier via a write unit and a beam of electromagnetic radiation, the write unit being positioned on the basis of a track structure which is indicative of the track pattern, characterized in that status information is generated which is indicative of the fact that at least one area of the record carrier has been written, the status information comprising initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks.
A reading device provided with read means for reading information blocks represented by optically readable marks in a track pattern on a record carrier, said device being provided with a read unit for reading the marks via a beam of electromagnetic radiation, and positioning means for positioning the read unit on the basis of the marks, characterized in that the positioning means are adapted to position in dependence upon status information which is indicative of the fact that at least one area of the record carrier has been written, the status information comprising initial-area information which is indicative of an uninterrupted written initial area which extends from the start of a track pattern area intended for writing information blocks.
Dependencies are inferred from the claim text.