嵌入式系統的應用在消費性電子產品上是愈來愈普遍且熱門的。其簡易的操控介面與作業系統的熟悉，讓使用者更容易上手，而程式設計者也更容易在高階的應用上做整合。早期的單晶片控制做低階的工業控制很容易，但稍具規模的系統則會受限於記憶體容量、運算速度與執行效能，已有漸漸被取代的趨勢，這也是嵌入式系統近年來廣泛被採用的原因之一。而利用嵌入式系統的觸控面板與液晶顯示來做「軟體按鍵」，可讓許多消費者感覺更具親和力一些，比起「硬體按鍵」也更具親和力與吸引力。

　　本論文即是利用嵌入式系統來做多媒體系統的控制介面，並透過簡易的RS-232介面來傳輸命令，讓多媒體控制系統能做影像與聲音的切換、單槍投影機的開啟與關閉、電動布幕的升降、麥克風與音量的控制，再搭配外部的紅外線遙控功能，且結合了RFID資料庫點名系統，來達成多功能控制的目的。

The applications of Embedded System on the consumer electronics are more and more common and popular. The operation interface and operation system are required to be easy understood and familiar and can such that make users more convenience to handle it. Easy programming to integrate on high-level application is another feature.

When the system is becoming more complicated, easily to use single chip control solution is not to be workable any more due to its limited memory capacity, poor performance and slow operating speed. The alternation aims to the Embedded System with much sophisticated functionality and friendly used interface such as LCD and “soft-button” touch panel on Embedded System.

The thesis use the Embedded System to control the Multimedia Control System, and transmit the command by the simple RS-232 interface, make Multimedia Control System switch the video and audio, projector on and off, electric screen up and down, the volume control of microphone and voice, with Infrared remote control, and combine the RFID Roll Call System to fulfill to the multi-function purpose.

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