Joint Packet Scheduling and Content-Aware Playout Control for Video Streaming over Wireless Links

摘要

Media streaming over wireless links is a challenging problem due to both the unreliable, time-varying nature of the wireless channel and the stringent delivery requirements of media traffic. In this paper, we use joint control of packet scheduling at the transmitter and content-aware playout at the receiver, so as to maximize the quality of media streaming over a wireless link. Our contributions are twofold. First, we formulate and study the problem of joint scheduling and playout control within a dynamic programming framework. Second, we propose a novel content-aware playout control, that takes into account the content of a video sequence, and in particular the motion characteristics of different scenes. We find that the joint scheduling and playout control can significantly improve the quality of the received video, at the expense of only a small amount of playout slowdown. Furthermore, thanks to the content-aware playout, the slowdown takes place mainly in the low-motion scenes, where its perceived effect is limited