The Design And Realization Of The Controlling System Of HDTV

The aim of this paper is to design the controlling system of BDB-T scheme of DTTB. The controlling system is the key part of the whole transport system. It consists of two parts: channel modulator's controlling system and the receiver's controlling system, including the interface designing of the demultiplexer, the controlling of the channel demultiplexer, IF modulator, tuner, the setting and transmitting of the system parameters, and the real-time monitoring of the whole system, etc. Based on the descriptions of the scheme of BDB-T and the principles of controlling circuits, this paper presents the hardware and software designing methods of the controlling circuits, and realizes a powerful, multifunctional and reliable controlling system which can automatically record the operational states of the system and communicate with other personal computers through a RS-232 serial interface.