在寬頻高速網路環境下，人們使用著各式各樣的消費性、網路電子產品來取得多樣的影音媒體服務及應用。隨著使用者擁有多個不同種類的影音裝置，影音檔案存放在不同的裝置上，不同廠牌的裝置間使用不同的網路檔案傳輸方式、檔案格式及呈現方式，使得裝置間無法互相分享並播放多媒體檔案。為了成功地讓多媒體裝置播放儲存在其他裝置上的多媒體檔案，使用者必須在各個裝置上安裝檔案傳輸的應用程式，或是利用其他儲存媒介來移動、傳遞檔案。然而，受限於各類裝置軟硬體架構的可擴充性與否，很可能無法使用上述方法進行分享，且這類複雜的操作不符合使用效益。 本研究提出一個服務導向的影音匯流平台設計，此一設計包含影音裝置的控制方法以及跨區域網路和網際網路的多媒體串流服務機制。在此平台中包含四個主要的元件：負責發布和呈現多媒體影音內容的多媒體匯流伺服器、轉換並導入外部多媒體內容至家庭網路的轉換介面、區域網路中裝置及服務的發現與管理機制以及多媒體裝置的控制介面。此平台的設計與發展依循UPnP和DLNA針對家用網路影音裝置所製訂的規格及標準，以達到裝置在家庭網路中的互通性。 透過軟體的設計與實作，本研究發展出一套應用程式整合了UPnP所使用的網路傳輸協定、部分DLNA所制定的規格及FFmpeg函式庫，並運行於Android作業系統。在應用程式的展示中，呈現了基於此匯流平台設計所達到的功能及使用情境。使用者可以發現連接在同一家庭網路中的多媒體裝置，透過網路傳輸方式，於家庭網路環境中取用影音及手持裝置上的多媒體內容；亦可將網際網路上各式樣的影音串流及網頁影音服務導入家庭網路中，供多媒體裝置播放。 ;People in pervasive broadband networks can access various kinds of media services with modern consumer electronics in residential environments. When they intent to share media content stored in different devices, they often fail to play or access any media items due to the incompatible issues of network transport, media type, and presentation formats between media devices. To successfully render the media content as wished, users may have to manually change device settings, configurations, and functionalities both in hardware and software, which is complicated to many users. The study of this thesis proposes an integrated design of a service-oriented platform and controlling mechanisms for enabling multimedia and streaming services across different media devices in managed home networks. This design consists of four major components: (i) a media controller for controlling media devices, (ii) a convergence server of publishing and representing content, (iii) a device discovery manager for discovering and monitoring devices in a local network, and (iv) a transformation engine of enabling Internet media streaming and playback in a home network. The development of the proposed design follows the interoperability specifications guided by Universal Plug and Play (UPnP) Forum and Digital Living Network Alliance (DLNA) that are aimed for the standards of home AV entertainment on modern home-networked devices. The implementation of the proposed design provides a proof-of-concept application system that integrates UPnP protocol stacks, partial DLNA specifications and FFmpeg libraries on Android operating systems. Practical demonstration shows the scenarios, and evaluates the performance of the proposed system. Consequently, the effort of this study offers users a friendly and networked operational solution. Users are now able to enjoy various multimedia contents from internal and external networks with many off-the-self home-networked devices as well as handheld devices in home network environments.
