應用於高效率視訊編碼的頻寬偵測技術;Available Bandwidth Estimation Technology for High Efficiency Video Coding

[[abstract]]隨著時代科技的進步，近年來影像傳輸技術也不斷進步，網際網路已經成為生活不可缺少的一部分，隨著智慧手機與平板電腦等行動裝置的普遍性，使得愈來愈多的相關應用程式移植到這些3C產品上面，也不斷推陳出新，網路多媒體的發展也越來越迅速，近年來像是網路直撥、影音廣告、網路通訊，這些裝置出現在生活中，頻寬偵測對多媒體傳輸的影響性就顯得非常重要了，可以讓用戶端達到高品質的服務。 本論文提出自動頻寬偵測，可以封裝影像串流的檔案，做為探測封包傳送，故在實作上不需再傳送大量額外探測封包，以免造成網路負擔。頻寬偵測中提出的頻寬計算方法，可提升頻寬偵測的準確性，最後實測得到，在有線網路環境下的頻寬準確度約為97.3%，無線網路環境下的頻寬準確度約為95.6%，相較於其他頻寬偵測工具準確。 In recent years, the service of multimedia transmission becomes universal due to the rapid development of wireless networks. Smart phone and tablet PC become more and more popularization, bring more convenience to people. The transmission of video streaming service for wireless is becoming increasingly popular, and most have a compressed video stream into different specifications to meet users for different bandwidth demand. However, bandwidth detection mechanism is very important in the transmission of video streaming. Using the information of bandwidth detection will make the clients to be high-quality services.The proposed bandwidth detection mechanism, which method is that encapsulate the video stream files become probing packet, and it do not need any additional burden. It has advantage of both active and passive measurement of detection. In this paper, the method used to calculate the bandwidth of self-made, so you can upgrade the client bandwidth detection accuracy. For the easily packet loss of wireless network environment, the methods we adopted, avoid the large amount of error from bandwidth detection due to packet loss, it can improve the accuracy. Our methods are proved to be superior to other bandwidth detection tools in measured results