Information playback system having an address search operation using a variable speed pickup positioning system

摘要

Information playback system for playing back information recorded on a record disk on which a plurality of recording track portions are juxtaposed in a radial direction, includes a detector for detecting information of a relative position of an information reading point on the radial direction of the record disk. During an address search operation, the information reading point is moved across the recording track portions at a speed calculated on the basis of the relative position of the information reading point.