Design And Realization Of SD And HD Hard Disk Broadcast Total Control System For Provincial TV Station

Currently, China TV broadcasting enterprises advance very rapidly, especially in the technological aspect. With the system and equipment digitalization in TV stations all over the country, the substantial transfer of the signal source from analog to digital has been finished. Further, the digitalization of the CATV network and the large-scale deployment of the digital set top boxes imply the completion of successfully transferring the signal transmission from analog to digital. The next task for the TV broadcasting industry is shifting to the high definition (HD) future from current standard definition (SD) age.In such situation, this paper presents a total control broadcasting system for provincial TV station. The proposed system employs the SD digital embedded audio SDI signal with seven TV channels, which is enough for almost all provincial TV stations. Moreover, considering the six to eight service life of the equipment in broadcasting total control system, the future trend of the broadcasting industry must be taken into account when designing the control system.The SD and HD Hard Disk Broadcast Total Control System for Provincial TV Station consist of the following subsystems:the video audio subsystem, the control subsystem, the network subsystem, the clock subsystem, the synchronous subsystem, the subtitle effect subsystem and the electric distribution subsystem. This paper will describe the seven subsystems in detail.The proposed system totally meets the strict demand in broadcasting safety of the TV total control, as there is no isolated breakdown point and the backup scheme is well defined and easy to implement. We believe the proposed system will provide a very valuable reference for building a broadcasting total control system for provincial TV station. HD channel design can achieve a channel of HD and SD with the broadcast or HD signal independent broadcast.