In order to avoid disturbance in synchronization establishment at the time of data transmission in a system includes different communication protocols (e.g., a DV system and a MPEG system), a transmission system side which complies with a plurality of communication protocols, includes a reproduction phase control unit for generating common synchronization information which can be shared among the plurality of communication protocols; and a transmission packet processing unit for multiplexing the common synchronization information generated by the reproduction phase control unit with information to be transmitted and for transmitting the resultant information to a reception apparatus, and a recording system side includes a recording control unit for controlling data recording operation according to the common synchronization information.