| 摘要 |
An information carrier has a pattern of substantially parallel tracks, each track includes a number of sectors and each sector includes an address-information area and an accompanying data area. In the address information areas, the so-called headers, immediately follow the data areas. These headers are composed of at least one address information field and at least one synchronization field and the address information areas in adjacent tracks overlap each other. The address information fields in adjacent tracks are positioned free of overlap relative to each other while adjacent synchronization fields overlap address information fields. This provides a more compact header. Apparatus for reading the information carrier uses a synchronization or a lock-in signal resulting from the reading of the synchronization fields, and the length of the synchronization fields is detected enabling a reliable read-out of the address information fields.
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