Researches And Design Of Audio Matrix Based On CobraNet

With the continuous development of social economy, professional audio transmission and switching system are more and more frequently used at present. It is used in many places such as radio stations, large venues, large buildings, large entertainment venues. The traditional certer audio matrix adopts analog distribute and wiring mode,but it can not fullfill the task of transfering more and more complicated high qualjty audio system.In order to solve these problems,to make distribute and wiring become more convenient and improve the Synchronization and real-time of the audio system,this paper researches the CobraNet technology and audio matrix based on CobraNet technology.The article designed an audio matrix system based on CobraNet technology.Firstly,paper compared and analysed the differences of the conventional audio matrix and matrix based on CobraNet technology summaried the advantage of matrix based on CobraNet technology elaborated research status of the CobraNet technology at home and abroad. Next,Paper researched the related protocols and synchronization mode of system and introduced the fuction of the CobraNet processor,and analyzed and studied the exchange technology and principle.Then In order to implement digital audio transmission, the design made full use of audio transmission function of CS4961xx series chip. To realize routing switch of the digital audio, design realized routing exchange of the32x32digital audio channel using FPGA, and it can detectl audio signal of each audio channel. To control the routing switch and display the communication state of the system, the embedded module STM32F107was joined in the system, to control routing and query states,system can not only realize real-time monitoring and control through application software, but also can realize the local monitor through the keys and LCD.Finally paper analysied the process of debugging of the system including the update of firmware and the MAC address,routing and switching,the control of serial communication.CobraNet audio matrix system has realized the audio transmission function and the exchange functions. The whole system delays small,runs stably and transmisson quality meet demand.The design can be used widely in radio,large buildings and so on.