Multimedia contents editing apparatus and multimedia contents playback apparatus

摘要

A moving picture is played and displayed according to synchronization control description data specifying a display starting time of a moving picture in a specific period, an offset time from the head of image data to the period, and a process starting time before a starting point time of the period. At this time, the image data from the process starting time to the starting point time is obtained and played, but is not displayed on the screen.