. "n order to adjust the source packet size and divide; SPH (Source Packet Header) 305 indicating whether the source packet has a header based on the kinds of data or not; DBC (Data Block continuity Counter) 306 which is a counter for confirming continuity of the data block; FMT (Format) 307 indicating kinds of transmitted data; and FDF (Format Dependent Field) 308 including parameter necessary for e" . . .