To receive the transmission packet of content packages and to output audio data.

At the time of receiving a serial data CPS which is the transmission packet of digital transfer interfaces obtained by packaging the data of each item including at least audio item data, SDTI(serial data transport interface) core section 222 separates the frame sequence data inserted into the header area provided correspondingly to an audio data block area into which audio data are inserted and the number of audio samples inserted into an audio sample counting area from each other and supplies them to an interface section 30 as signals FA. The section 30 discriminates a video frame frequency from the frame sequence data and the number of audio samples, generates a reproduction reference signal based on the discriminated results, and outputs audio data DQU based on the reference signal.