The mobile receiving system is responsible for frequency conversion and demodulation of the received high-frequency modulation signal to obtain the digital television MPEG transmission stream (MPEG-TS), then demultiplexing, decoding, control and processing, and finally display on the display screen. The high frequency head of the digital television mobile receiver is responsible for converting the RF signal into the intermediate frequency or baseband modulation signal that the demodulator can receive. The demodulator is responsible for the channel characteristic compensation, channel demodulation and channel decoding, and the output is the broadcast data stream containing digital TV programs and multimedia services. The demultiplexer is responsible for separating the required broadcast data stream from other stream signals. According to the control information, the video and audio decoder selects the corresponding video and audio broadcast data stream of the machine from the separated stream signal to download or play in real time, and processes the obtained other multimedia data accordingly, and finally displays it on the display screen according to the user's requirements.

The mobile receiving system of terrestrial digital television broadcasting system consists of high gain omnidirectional mobile receiving antenna, mobile receiver, mobile receiving control software, mobile storage software, display screen and so on. Digital TV mobile receiver (or mobile receiving digital TV set-top box) also includes a high frequency head, demodulator, demultiplexer, video and audio decoder and other functional modules.

To sum up, before the national standard for terrestrial digital television is enforced, the systems that carry out terrestrial digital television broadcasting experiments in various regions must have the ability to be transformed to meet the national standard for terrestrial digital television in the future and carry out terrestrial digital television broadcasting experiments. Various places have also accumulated a lot of experience, which has laid a solid foundation for the development of terrestrial digital TV, and the overall digital transformation of radio and television is imperative.