Method of storing a disc-ID on a record carrier, device and record carrier

Abstract

The invention relates to a method of storing a disc-ID on a record carrier ( 1 ) comprising tracks ( 4 ) in which information can be stored. This disc-ID comprises a predetermined fixed number of disc-ID bits ( 10 ). The disc-ID bits ( 10 ) are stored on the record carrier ( 1 ) in a scattered way. For example, the disc-ID bits ( 10 ) can be stored in groups of one disc-ID bit ( 1 ) and at positions reserved for storing non-data bits. The invention further relates to a device for reading the record carrier ( 1 ) with the scattered disc-ID, and to a record carrier ( 1 ).

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 carrier ( 1 ) in a scattered way.  
   
   
       13 . A device as claimed in claim, 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 carrier 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 carrier 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 ).