Formerly, it was difficult to exercise proper control for recording and outputting a plurality of contiguous data. To solve this problem, for example, a plurality of contiguous data are acquired from a stream in which the reference information for reproducing at an acquisition end a clock synchronized with a system clock prevailing at the time of generation is multiplexed. A plurality of timestamped data are then read from recording means. Timestamp information is removed from the read timestamped information. The resulting data without the timestamp information is handled as the read data and output with the timing dependent on the timestamp information. The timestamp information generation operation performed for a write and the output operation performed for a read with the timing dependent on the timestamp information are synchronized with an adjusted clock.