Optical disc with pre-recorded and recordable regions and methods of forming the disc
View Patent ↗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.
1. An optical disc, comprising:
a first region with pre-recorded data including program content; and
at least one recordable region;
wherein the program content is recorded during manufacturing of the disc, and is unreadable until data for finalizing the disc is written to the at least one recordable region.
2. The optical disc of claim 1 , wherein the data for finalizing the disc includes at least one of: control data and file system data.
3. The optical disc of claim 1 , wherein the program content is encrypted, and can be decrypted by writing decryption information to the at least one recordable region.
4. The optical disc of claim 1 , wherein the pre-recorded data includes information for at least one of: identifying a location of the at least one recordable region, identifying the data for finalizing the disc, and identifying additional data to be written.
5. The optical disc of claim 1 , wherein the pre-recorded data is formed on the disc by injection molding.
6. The optical disc of claim 1 , wherein the first region and the at least one recordable region are provided on a single data layer of the disc.
7. The optical disc of claim 1 , wherein the first region and the at least one recordable region are provided on different data layers of the disc.
8. The optical disc of claim 1 , wherein the at least one recordable region includes at least one groove.
9. The optical disc of claim 8 , wherein the at least one groove is configured for tracking by an optical pickup unit for recording data in the recordable region.
10. The optical disc of claim 1 , wherein the recordable region includes at least a grooveless recordable section.
11. The optical disc of claim 1 , wherein the recordable region includes at least one discontinuous groove.
12. The optical disc of claim 10 , wherein the grooveless recordable section has a length less than about 100 μm.
13. The optical disc of claim 12 , wherein the grooveless recordable section is located between two pre-recorded pits.
14. The optical disc of claim 12 , wherein the grooveless recordable section is located between two recording grooves.
15. The optical disc of claim 12 , wherein the grooveless recordable section has a length greater than about 10 μm.
16. The optical disc of claim 1 , wherein the at least one recordable region is configured for recording additional data that includes at least one of: data that matches at least one error correction code in the recordable region, and data for enhancing the program content.
17. The optical disc of claim 1 , wherein the at least one recordable region is located outside a lead-in area and a lead-out area of the optical disc.
18. An optical disc, comprising:
a recordable region having at least one grooveless region;
wherein the at least one grooveless region is configured for recording data after disc manufacturing, and has a length less than about 100 μm along a data track.
19. The optical disc of claim 18 , wherein the at least one grooveless region is located between two pre-recorded pits.
20. The optical disc of claim 18 , wherein the at least one grooveless region is located between two recording grooves.
21. The optical disc of claim 18 , wherein the at least one grooveless region has a length greater than about 10 μm.
22. The optical disc of claim 18 , wherein the recordable region is configured for recording additional data including at least one of: control data, file system data, data that matches at least one error correction code in the recordable region, and data for enhancing the program content.
23. An optical disc, comprising:
a recordable region having at least one grooveless region;
wherein the at least one grooveless region is configured for recording data after disc manufacturing, and has a length greater than about 10 μm.
24. The optical disc of claim 23 , wherein the at least one grooveless region is located between two pre-recorded pits.
25. The optical disc of claim 23 , wherein the at least one grooveless region is located between two recording grooves.
26. The optical disc of claim 23 , wherein the recordable region is configured for recording additional data including at least one of: control data, file system data, data that matches at least one error correction code in the recordable region, and data for enhancing the program content.