A receiving apparatus for receiving image data from a server, which changes the order of frames of moving image data coded in the MPEG format or the like, and transmits second image data formed from only inter-frame coded frames after transmission of first image data formed from only intra-frame coded frames. Instructions are byte aligned and variable length. Dosages of the shots may be allowed to vary with respect to each other. Additionally, a recovery set of partitions is determined for which messages in supersteps after the recovery initiation superstep are not available.