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US 9,025,426 B2Granted
Optical disc with pre-recorded and recordable regions and method of forming the disc
AssigneeThomson Licensing
InventorsJohn Matthew Town, Alan Bruce Hamersley, Holger Hofmann
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Abstract
An optical disc having a region with pre-recorded data and a recordable region, a method of fabricating the disc, a stamper for forming a disc master, and a recording device for use with the disc are disclosed. Data recorded in the recordable region may be used for activation of the disc, providing unique identification or enhancing program content on the disc.
Claims20
A recording device, comprising:
- a processor configured to:
- retrieve information for identifying at least one recordable region of a disc by one of:
- accessing pre-recorded data on the disc, and accessing a database external to the disc;
- and
- direct a laser to write additional data to the at least one recordable region during a finalization procedure after disc manufacturing;
- wherein the additional data includes at least one of:
- custom data for augmenting program content on the disc, custom data unique to the disc, control data, and file system data;
- wherein the at least one recordable region has at least one groove with a plurality of gaps;
- and the laser is configured for writing data to at least one of:
- the groove, and one of the plurality of gaps;
- and
- wherein the laser is configured to write data to at least one gap and each of the plurality of gaps has a length less than about 200 nm.
9 more elements
A recording device, comprising:
- a processor configured to:
- retrieve information for identifying at least one recordable region of a disc by one of:
- accessing pre-recorded data on the disc, and accessing a database external to the disc;
- and
- direct a laser to write additional data to the at least one recordable region during a finalization procedure after disc manufacturing;
- wherein the additional data includes at least one of:
- custom data for augmenting program content on the disc, custom data unique to the disc, control data, and file system data;
- wherein the at least one recordable region has at least one groove with a plurality of gaps;
- and the laser is configured for writing data to at least one of:
- the groove, and one of the plurality of gaps;
- and
- wherein the laser is configured for writing data to at least one gap having a length less than about 200 nm.
9 more elements
Dependencies are inferred from the claim text.