Combination optical media, device and method for accessing the combination optical media
An optical medium and medium technology, applied in the direction of recording/reproducing by optical methods, optical record carriers, record carriers used by machines, etc., can solve the problems of long startup time and uncertain startup of optical drives, etc.
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[0034] The following description focuses on embodiments of the invention applicable to combination optical media, particularly combination optical discs. However, it should be clear that the invention is not limited to this application, but can be applied to many other optical media including, for example, a Minidisc comprising both an MO recording layer and a compact disc with pre-recorded information. flower layers.
[0035] As mentioned above, it is desirable if the identification of the disc type can be done as quickly and as completely as possible.
[0036] in accordance with Figure 1A and 1BIn an embodiment of the invention, an electronic memory chip 4 is integrated into the combination optical disc 1 . The chip 4 contains a memory on which information relating to the format type of the layers 10, 11 on the disc 1 is stored. RF radiation is preferably used for reading out the information from the chip 4, wherein the energy for the information transfer from the chip i...
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