Program data communication system

摘要

In a program data communication system, in response to a notification request command signal from a program data receiver apparatus for requesting a notification as to whether or not at least one designated program data among a plurality of pieces of program data can be descrambled, a program data transmitter apparatus transmits a notification command signal including information as to whether or not the designated program data can be descrambled by a descrambling section to the program data receiver apparatus. Next, the program data transmitter apparatus descrambles the designated program data in response to a transmission request command signal from the program data receiver apparatus for requesting that the designated program data be transmitted, and then transmits descrambled program data to the program data receiver apparatus.