Cable Television Headend Multipicture Monitoring And Alarm System Design And Implementation

There are more than hundreds channels in various different levels, which cover across China. For preventing the interruptions by the unapproved broadcasting program, the Broadcasting and Television administration must supervise the signals on time. After the efforts in a long time, we combined the various latest skills and the broadcasting and television skills based on which we design an early supervising system for multi-frames in cable TV which is helpful to the supervisors preventing the defaults and intruding by the unapproved broadcasting program.This paper begins with an introduction to the development of the automatic supervising the television signal and the situation within China and the trend in the world. Following that it is discussing the general idea for the designing and the functions in the sub-systems. Then analyzing the critical skills including how to deal with the troubles such like stagnate screen, silence frame and how to deal with them, also probing the latest skills for the displaying in separated screens. As a conclusion showing the system's proceeding.This development of the software is based on the VF (model Haikangweishi DS-40XXHC) in the Windows desktop with vc++6.0. The system mainly focuses on supervising the analog television signal and probing the supervision and alarm for cable TV in multi-frame, its design and applying, and providing the display in multi-frame with analog signal, simultaneous supervision and alarm. When supervising the content and the quality of the showing program, the system also provides many supporting function such like multi-signals displaying in the same screen, video record in the disk and audio alarm. The system supervises the video frequency with the division and match of the digital pictures and send the alarm for the unusual television station's icon. When displaying the multi-frame in the same screen, the system provides the calculating for the division of the screen with constant ratio in the multi-frame, so the division of the screen can be auto or manual and the frame can be expanded much more and reasonably. The system provide with the early video recording when the disk video recording available. When applying this system in the practical program it proved that it is successful.