دانلود مقاله ISI انگلیسی شماره 70340
عنوان فارسی مقاله

تطبیق نرخ پویا برای جریان ویدئو تطبیقی در شبکه های بی سیم ☆

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70340 2015 11 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Dynamic rate adaptation for adaptive video streaming in wireless networks ☆
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Signal Processing: Image Communication, Volume 39, Part A, November 2015, Pages 305–315

کلمات کلیدی
DASH - چند رسانه ای بی سیم
پیش نمایش مقاله
پیش نمایش مقاله تطبیق نرخ پویا برای جریان ویدئو تطبیقی در شبکه های بی سیم ☆

چکیده انگلیسی

In this paper, we investigate the streaming strategy for dynamic adaptive streaming over HTTP (DASH). Specifically, we focus on the rate adaptation algorithm for streaming scalable video (H.264/SVC) in wireless networks. We model the rate adaptation problem as a Markov Decision Process (MDP), aiming to find an optimal streaming strategy in terms of user-perceived quality of services (QoS) such as playback interruption, average playback quality and playback smoothness. We then obtain the optimal MDP solution using dynamic programming. However, the optimal solution requires the knowledge of the available bandwidth statistics and has a large number of states, which makes it difficult to obtain the optimal solution in real time. Therefore, we further propose an online algorithm which integrates the learning and planning process. The proposed online algorithm collects bandwidth statistics and makes streaming decisions in real time. A reward parameter has been defined in our proposed streaming strategy, which can be adjusted to make a good trade-off between the average playback quality and playback smoothness. We also use a simple testbed to validate our proposed algorithm. Experimental results show the feasibility of the proposed algorithm and its advantage over the existing work.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.