To select program data in order from the highest transmission priority and to transmit them while they are time-divisionally multiplexed by controlling a program data state in accordance with broadcast time information and selecting/transmitting program data in accordance with priority information among program data in a transmission possible state.
At the time of broadcasting video data of a base band, which is transmitted from a video camera and a vides server as a real time program, a content production device 11 transmits it to a broadcast management device 13 at the time of broadcasting it as a real time program and transmits it to authoring terminal equipment 12 at the time of broadcasting it as an accumulative program. Recording video sound data and other digital data are compiled and worked and content data is generated. Content data is stored in the content storage part of the broadcast management device 13. Program data constituting a program supplied to a viewer is decided by information on program organization, a stream based on data is generated and is transmitted to a transmission part 14. Program data is converted into the signal of a transmission line adaptation type and is transmitted.
SASADA MASAAKI
KASUGAI SHINICHIRO
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