Disk apparatus used with a recording medium having clock marks detected by clock interpolation

摘要: Clock marks for sampling clock components have been formed in advance at constant intervals along the tracks of a disk recording medium and, when rotationally driving medium, these are detected to sample components. By component from thus fixed periods and further generating an interpolation region between on basis sampled component, very accurate can be obtained, as compared case which is reproducing code. Consequently, there realized large-capacity medium.