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 .