近年來，由於數位科技的進步與多媒體技術的發展，數位化的資料具有高資料壓縮率、高抑制雜訊能力、保密性佳與可攜性等優勢，因此目前大部分的多媒體資料皆改由數位格式呈現。此外，藍芽無線網路系統具有不必透過纜線傳輸、大幅增加空間的使用性等特點，在一定的範圍內(10公尺以內) 可提供便利的資料傳輸環境。基於上述各項優點，本論文旨在發展出一套以PC為基礎之藍芽數位音訊無線廣播系統。
本系統以PC建構一MP3資料庫暨加密程式，透過Bluetooth USB Dongle將加密後的MP3音訊資料以無線方式廣播傳送，並在接收端以FPGA整合藍芽無線模組將接收到的無線訊號，經解調變與解碼後進行撥放。本論文主要包含以下設計：(1)設計GUI傳輸控制視窗；(2)結合Bluetooth USB Dongle及藍芽收發模組(BTM3015EC4C5-00)；(3)以FPGA為核心整合無線收發模組和MP3解碼晶片實現接收端播放平台。經實際測試後，本系統可以正確地將MP3音訊資料加密廣播並於接收端將其解密且進行即時撥放的動作。

Recently, the digital multimedia is becoming a major issue because of it has some significant properties such as high compression rate, noise reduction, secrecy, and pocketable. Therefore, the most data of the multimedia are presented with digital format. Furthermore, Bluetooth wireless network provides a convenient environment which can connect to the local area network without any wiring efforts and enjoy reliable high-speed connectivity. Inspired by the advantages mentioned above, a PC-based wireless audio broadcast system is proposed this study.
Firstly, the audio database with MP3 format have been built and encrypted in the host. Secondly, the encrypted data are broadcasted by Bluetooth USB dongle. Finally, these data are decrypted and displayed on FPGA-based receiver. The works of this study include: (1) design of GUI command window; (2) connection between Bluetooth Dongle and Bluetooth module; (3) integration among FPGA developed board, Bluetooth module, MP3 decoder, and DES for implementing the broadcast platform. In practical, the proposed system can work effectively and ensure data accuracy.

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