A transmit device and method, a record/play device and method, a record system as well as a media allowing selection of the ideal record media by the receiver. The EPG data generator of a transmit device generates an EPG (Electronic Program Guide) showing the scheduled transmission of the program to be broadcast. An editor generates supplemental information containing information indicating the program data quantity, adds the supplemental information to the EPG and a multiplexer transmits the EPG added with the supplemental information.