Digital public address system with central control using operational MICOM

There are two kinds of public address(PA) systems, which are an analog PA system and a digital PA system. The digital PA system has more communication quality than the analog PA, and there are a variety of digital PA systems made by many companies. A digital PA system is utilized in all public places attended by vast crowds of people. In this paper, we developed a digital, minimized and integrated PA system. It has facilities such as an external input, a microphone, CD and a radio for a PA system. Also, developed the digital integrated PA system with operational MICOM (micro computer) will make it possible to control the facilities of the digital devices centrally. The operational MICOM is composed of 3 layers which are a control layer, a processing layer and a user interface layer. In addition that, the remote control and key inputs are used for the central control. As an execution result, the system is able to operate each digital media individually or together concurrently.