提供適當多媒體內容給異種客戶端系統

Abstract

在網路上多媒體內容的快速增加使得越來越多的網路工具能連上網際網路，而多媒體內容在網際網路傳送需要知道多種多樣客戶端平台的性能。為了使多媒體的內容能最佳的配合客戶端的性能，我們提出一個能使多媒體內容適當呈現的系統；此系統同時具備內容呈現的架構和內容的選擇。內容呈現的架構就是所謂的”金字塔資訊”，其對於媒體的內容提供多重解析和多重形式。內容選擇就是所謂的”策略工具”，它在客戶性能的資源限制下能選擇適合的內容。 對於策略工具，其依據客戶端性能來處理媒體內容資源時，是以用在多媒體內容的轉換的值架構為基礎來使用貪婪演算法，並且也允許在網頁內容項目上依其重要性加上優先順序。此外，我們的系統使合適的新聞內容送到個人電腦、個人數位助理和蜂巢式電話。

The rapid growth of multimedia content in the network makes more and more network appliances connected to Internet. The multimedia contents delivery over the Internet needs to address the capabilities of diverse client platforms. In order to adapt the multimedia contents to optimally match the capabilities of the client devices, we present an adaptive multimedia content agent which supplies content representation scheme and content customization. The content representation scheme called InfoPyramid provides multiple resolutions and multiple modalities for media contents. The content customization called policy engine selects suitable media contents adapted to the constraint of client capabilities. For policy engine, it process the resource requirements of the media content items according to the capabilities of the client devices using greedy algorithm based on value-framework for multimedia content transcoding. It also allows the prioritization on the content items with their importance in a web document. Furthermore, our agent-based content adaptation system adapts the news content to PC, PDA and cellular phone.