METHOD AND DEVICE FOR CONTROLLING TRACKING OF OPTICAL MEMORY CARD

摘要

A method and device for controlling the tracking of an optical memory card by which synchronism can be established easily, a track holding mistake can be detected and corrected easily, high speed operation can be realized and the double-writing, etc. can be avoided. The guide tracks (2) for optical memory cards are composed of the rows of guide track segments (4, 4a, 4b, 4c and 4d). A synchronizing signal is extracted from the row pattern of the guide tracks detected by photodetectors (11 and 12) and a data recording track (1) is identified to establish synchronism and a track holding mistake is detected and corrected.