The use method of on-board TV can be operated according to the instructions. Digital TV technology is adopted to broadcast TV programs through wireless transmission and ground reception. The vehicle-mounted television system can be divided into two subsystems: the transmitter and the receiver. From the technical point of view, it can be divided into two parts: the source and the channel.

Vehicle-mounted mobile digital TV (hereinafter referred to as vehicle-mounted TV) is a kind of mobile digital TV, which is usually installed on public transport vehicles such as buses, subways and taxis. It uses digital TV technology to broadcast TV programs through wireless transmission and ground reception. Mobile digital TV is digital TV that can be watched on the move. Vehicle-mounted TV has the characteristics of wide coverage, rapid response, strong mobility, etc. It can keep the picture clear no matter in high-speed mobile or fixed state, realize the function of watching at any time and anywhere, and greatly meet the demand of the vast video audience for information in the fast-paced urban life.

Car TV was first applied in Singapore. Singapore has built a total of eight digital television transmission stations, and in February 2001, it began to install on-board television on 1500 buses, providing mobile digital television services for 1.5 million passengers per day.