Cable TV network is the transmission of TV signals through the prime medium, and now the development direction is HFC(fiber coaxial hybrid network), the transmission is digital TV, the home terminal needs a decoder; Wireless TV network is transmitted through the air signal, each TV channel transmission frequency is not the same, the receiving end needs to receive the signal and then mixed, the common wireless TV network is the local TV station, still retain the traditional wireless transmission, as long as there is an antenna at home can receive the TV signal. There are also TV signals transmitted by satellite, which are radio video networks.