Abstract
We developed the broadcast TS transmission system using the IP network and build SFN of a master/slave synchronization system. This system controls and fixes the delay time, and it transmits a stable broadcast TS and clock to relay stations. We confirmed by experiments for extended periods that it's possible to construct SFN on the IP network. A burden of the operator when using, is reduced by automating the delay time control of OFDM modulators. And we built an efficient and a reasonable system such as sharing the VPN with a 4FSK radio communication system by reducing null packets.
