| With the acceleration of digitization and network in broadcast station, the central audio matrix system, which is the most important data transmission and exchange system, has been applied widely in broadcast stations and plays a key role. As the most important part of the system, matrix control system will make a notable impact on the normal works of the audio matrix directly; its reliability is also a crucial factor of the system.The design process of central audio matrix control system is analyzed in this paper. With c, c++ language, a high efficient control system relies on CobraNet audio matrix is developed. Firstly, the CobraNet protocol, its mechanism and practicability are introduced. Combining with the characteristic of audio transmission system, the predominance of central audio matrix control system which applied to central audio matrix system is clarified as well. Secondly on an analysis of broadcast station's application environment and requirement for central audio control system, a high reliable matrix control system are proposed, which including an embedded matrix controller and a control system based on PC. The embedded matrix controller is based on AT91RM9200, ARM-Linux OS and MiniGUI GUI system. In this paper the process of development which includes MiniGUI's transplantation, the structure of the system modules and the setup of the cross compile environment are introduced. Based on PC and Windows OS ,a suit of matrix control system software is designed and actualized finally, it amply introduces the process of design and implement including requirement analysis,module partition,module structure,the information design of system and so on.The multiple redundancies are the most special parts of this system. The embedded controller is used as redundancy backup for the system based on PC. The assistant server is used as redundancy backup for the main server. We also adopt C/S mode in the control system based on PC to enhance its security. |
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