Patent EA-002300-B1 (EA)
Title: Method of storing an identification on a record carrier, device and record carrier
Inventor: VAN DEN EDEN GIJSBERT J
IPC: G11B20/12
Filed: 2000-01-28
Abstract: 1. A method of storing a disc-ID on a record carrier (1) comprising tracks (4) in which information can be stored, said disc-ID comprising a predetermined number of disc-ID bits (10), characterized in that the disc-ID bits (10) are stored on the record carrier (1) in a scattered way. 2. A method as claimed in claim 1, characterized in that disc-ID bits (10) are stored in groups of one bit on the record carrier (1) in a scattered way. 3. A method as claimed in claim 1 or 2, characterized in that the disc-ID bits (10) are stored at positions reserved for storing non-data bits. 4. A method as claimed in claim 1, 2 or 3, characterized in that the disc-ID bits (10) are stored in a preamble (8) of the data bits (6) on the record carrier (1). 5. A method as claimed in claim 1, characterized in that the disc-ID bits (10) associated with one disc-ID are stored in a predetermined number of tracks (4). 6. A method as claimed in claim 1 or 5, characterized in that the same number of disc-ID bits (10) is stored in the tracks (4). 7. A method as claimed in claim 1 or 5, characterized in that disc-IDs are stored several times on the record carrier (1). 8. A method as claimed in claim 7, characterized in that the same number of tracks (4) is used for storing the disc-IDs. 9. A method as claimed in claim 5 or 6, characterized in that a disc-ID byte is formed by eight disc-ID bits (10) having the same position in a direction perpendicular to a read direction of the record carrier (1). 10. A device for reading a record carrier {1), comprising a system (34, 48) for detecting and reading information present on the record carrier (1), said system comprising detection means for detecting a disc-ID on the record carrier (1), said disc-ID comprising a predetermined number of disc-ID bits (10), characterized in that the detection means are also adapted to detect a disc-ID whose disc-ID bits (10) are stored on the record carrier (1) in a scattered way. 11. A device for writing a record carrier (1), comprising write means (27) for inducing a detectable change on a layer of the record carrier (1), said write means (27) being further adapted to write a disc-ID on the record carrier (1), said disc-ID comprising a predetermined number of disc-ID bits (10), characterized in that the write means (27) are also adapted to write the disc-ID bits (10) on the record carrier in a scattered way. 12. A device as claimed in claim 11, characterized in that the write means (27) are also adapted to write the disc-ID bits (10) in groups of one bit on the record Garner (1) in a scattered way. 13. A device as claimed in claim 11, characterized in that the write means (27) are also adapted to write the disc-ID bits (10) at positions reserved for storing non-data bits. 14. A device as claimed in claim 10 or 11, characterized in that the device also comprises means (49) for providing access to information on the record carrier. 15. A record carrier comprising a disc-ID stored on the record carrier (1), said disc-ID comprising a predetermined number of disc-ID bits (10), characterized in that the disc-ID bits are stored on the record carrier (1) in a scattered way. 16. A record carver as claimed in claim 15, characterized in that the disc-ID bits (10) are stored in groups of one bit on the record carrier (1) in a scattered way. 17. A record carver as claimed in claim 15, characterized in that the disc-ID bits (10) are stored at positions reserved for storing non-data bits. 18. A record carrier as claimed in claim 15, characterized in that a plurality of disc-IDs is stored on the record carrier (1).