隨著多媒體系統與網路技術的成熟，讓使用者可存取散佈在異質網路中的影像的相關應用已越來越普遍，例如:防盜系統、流量控管系統、監視系統…等已可透過網路傳遞監視畫面給遠端的使用者，而其影像品質取決於不同使用者之存取能力而定，多數的監視系統採用不停歇的影像擷取，透過網路來傳遞監視畫面，不論在硬體或網路負載上都是一大挑戰。在有限的網路頻寬上，影像品質與傳輸效率是一個權衡取捨的議題，其因素包含使用者所處之網路、所用之設備…等，要如何將所有使用者所獲取的影像同步與調校也是一個值得挑戰的難題。在本篇研究中提出一演算法“基於過去已傳輸至使用者端之影格的網路延遲回饋以調適影格間暫停時間之傳送機制”來達成較有效率的同步畫面傳遞，最後我們將此演算法實作並與其他類似機制比較其效能差異。

Abstract—As multimedia system and network technology mature, the users in a heterogeneous network accessing the images has become increasingly universal. Frames can be passed through the network to the remote user in anti-theft systems, traffic control systems, surveillance systems…etc. The quality of access to the video among simultaneous viewers with different access capabilities is determined by the networks that the users are associated with and the devices which the viewers use. Unless in hardware or network loading, most of the surveillance system using the uninterrupted image capture passing through the network to surveillance screen is a major challenge. With the limited network bandwidth, balancing the video quality and the transmission delay is a trade-off issue. Furthermore, how to adapt the video content to reach a quality compromise among numerous simultaneous video viewers with various capabilities is also a challenging issue. The present research proposed an adaptive frame pausing scheme based on the delay feedback of past frame delivery from viewers. Besides, we also tried different frame pausing schemes in this work. The efficiency of the proposed mechanisms is also demonstrated.

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