Recording Apparatus and Method, and Reproducing Apparatus and Method

摘要

A reproducing apparatus for reading, or a recording apparatus for writing, data from or to a disc (1) having pre-formed thereon a pair of concentrical or spiral tracks (TrA, TrB) adjacent to each other and to which a common address is given, is adapted to control the time at which a read (11) or write head (12) is moved from one to the other of the pair of tracks or vice versa.