| 摘要 |
In the read tracks (1) and (2), detectors (3) for information sections (4) are arranged, the switching-on edges (5a) and (5b) of which form trapezoids in the information sections (4a) and (4d) and parallelograms in (4b) and (4c). The 0/1 result of the edge evaluation is entered underneath the information sections (4): Bottom track on first: bit 1 = 0 Bottom track off last: bit 2 = 0 Top track on first: bit 1 = 1 Top track off last: bit 2 = 1 <IMAGE>
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