A reproduction player (10) comprising a packet processing unit (14) for allowing A/V data reproduced from a recording medium by a disc reproducing unit (12) and an encoder (13) to be packet data so that communication packet is provided, and for inserting additional information indicating operating state of the reproduction player (10) into the communication packet, and a remocon (20) comprising a packet processing unit (25) for taking out additional information along with A/V data from communication packet that a receiving unit (24) has received, an output unit (21) for externally outputting music and/or image on the basis of the A/V data, and a display unit (22) for displaying operating state of the reproduction player (10) on the basis of the additional information are used to constitute a reproducing system which reproduces music and/or video data. User can recognize, on the real time basis, the state of the unit of the transmitting side which reproduces A/V data at an remote output equipment.