Information recording medium, information reading apparatus and information recording apparatus
a technology of information recording and reading apparatus, applied in the field of information recording medium, information reading apparatus and information recording apparatus, can solve the problems of wobble signal crosstalk, signal cn degrade, reference signal extracted from wobble signal becomes inaccurate,
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second embodiment
[0138] (Second Embodiment)
[0139] Next, referring to FIGS. 6 to 9, the following will discuss a second embodiment of an information recording medium according to the present invention.
[0140] A signal format of this embodiment is almost the same as that of the first embodiment shown in FIG. 1. However, the synchronizing signal and substantial data except the marker are randomized based on a predetermined random signal, and are each recorded as variation of the positions of pits in the circumferential direction (the direction of a pit reading) of a disk, that is, in the circumferential direction of the disk against a track formed in a spiral fashion. For example, when a pit is positioned forward in the direction of the pit reading (the advance side in time-axis), a mark "0" is assigned. When a pit is positioned backward in the direction of the pit reading (the delay side in time-axis), a mark "1" is assigned.
[0141] In the embodiment, any one of a lead-in area, a lead-out area and a dat...
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