In the rapid development of IP technology and constantly promote the triple play,thedigital TV front-end system is getting into large capacity，multi-service and lP. Systemequipment based on IP technology have high degree of integration, function of signal have themultiplexing，scrambling，processing，scheduling，backup protection and so on. Greatlyimprove the operational efficiency and safety broadcast performance, accord the demand ofrich program content and multi-service signal scheduling.Ethernet interfaces instead ASIinterface, the IP network to carry TS signal digital television technology has become a newtrend.