Rate-distortion based real-time wireless video streaming
- 作者：Hulya Seferoglu ; Ozgur Gurbuz ; Ozgur Ercetin ; Yucel Altunbasak
- 关键词：Channel coding ; Error correction ; Multimedia streaming ; Packet scheduling ; Rate-distortion optimization ; Video coding ; Wireless networks
- 刊名：Signal Processing ; Image Communication
- 出版年：2007
- 期刊代码：110_09235965
- 类别：cp
- 出版时间：July 2007
- 卷：22
- 期：6
- 页码：529-542
- 文件大小：438 K
摘要
This paper presents wireless video streaming techniques that exploit the characteristics of video content, transmission history, and physical layer channels to enable real-time efficient video streaming over wireless networks to a wireless client. The key contribution of the proposed video streaming techniques is the use of rate-distortion based, but simplified, low complexity packet scheduling as well as forward error correction (FEC) rate selection. To this end, we develop an optimization framework that jointly schedules the packets and selects the FEC rates. The rate-distortion optimized packet scheduling and FEC rate selection provides the optimum quality video on the receiver side albeit at a high computational cost. By some intelligent approximations, rate distortion optimized packet scheduling and FEC rate selection technique is transformed into two sub-optimal but low complexity video streaming techniques that can provide high video quality. We perform extensive simulations to understand the performance of our proposed techniques under different scenarios. Results show that, the proposed techniques improve video quality on the average by 4 dB. We conclude that significant benefits to end-user experience can be obtained by using such video streaming methods.