Data processing apparatus, data recording device, data reproducing device and method for writing data on recording medium with multiple recording layers
A technology for data processing devices and recording media, applied in optical recording/reproduction/erasing methods, data recording, digital recording/reproduction, etc., capable of solving problems such as inapplicability and inclusion layer boundaries that cannot be recorded, and achieving reliable addressing Effect
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Embodiment approach 1
[0053] 1( a ), ( b1 ), ( b2 ) and ( c ) show an outline of a data size adjustment method for image data for writing image data on the two-layer optical disc 19 . FIG. 1(c) schematically shows a cross-section of a two-layer optical disc 19. As shown in FIG. The double-layer optical disk 19 may be a double-layer DVD-R disk, or may be a recordable optical disk having multiple layers, such as a double-layer DVD-RW disk. 1( a ) and ( b2 ) respectively show image data 21 and image data 26 prepared assuming writing in the L0 layer and the L1 layer. FIG. 1( b1 ) shows image data processed by the processing of this embodiment.
[0054] As shown in FIG. 1( c ), a lead-in area 11 , a data-recordable area 12 , and an intermediate area 13 are formed from the beginning in the L0 layer. The physical address of the head sector of the recordable data area 12 of the L0 layer is represented by S, and the physical address of the last sector is represented by X. The middle area 13 is preformed....
Embodiment approach 2
[0158] In Embodiment 1, a case where the data size of the CMF data for the L0 layer is adjusted is described as an example. Assume that the CMF data is encrypted by CPRM.
[0159] In this embodiment, a data recording method when CMF data is encrypted by an encryption method different from the CPRM method will be described.
[0160]In addition to the CPRM method, encryption methods suitable for recordable discs include AACS (advanced access content system) and CSS (copy scrambling system). Next, in addition to the processing of the first embodiment, the processing when data is encrypted by the CSS method will be described. When the CSS method is adopted, encryption is performed using information unique to each disc to be recorded.
[0161] As information unique to each disc, identification information (disc key) of the medium recorded in the lead-in area can be used.
[0162] Also, no disc key is set in the existing DVD-R. Therefore, when using a DVD-R, a new type of disc i...
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