System Of Multi-channel Digital Audio Monitoring And Access Control

With the fast development of modern electronic technology, the public requirement for broadcasting quality is highly increased. The degitization of audio signals has already become the tendency of the public broadcasting equipment. The traditional broadcasting equipment need staff always on duty in the machine room, but along with the maturing of network technology, the networked system of multi-channel digital audio monitoring and access control make the staff enable to monitor the broadcasting equipment in real-time and remotely control to switch the output signal through the PC software, so that they can avoid working on duty in the machine room. The system will be well applicated in future.The system of multi-channel digital audio monitoring and access control is designed in this paper, and its function is achieved mainly by two modules: module of audio signal acquisition and processing; module of control and communication. The task of first module is to decode the input signal and monitor the signal quality, and also utilize automatic switching program to switch signal in order to satisfy the standard. The second module is responsible for communicating with the first module and interacting with the host computer through ethernet port that utilize TCP/IP network technology and network communication program based on VDK. It is the bridge between the first module and the host computer. Finally, this system had a good performance and satisfied the requirement after the test.