Rate-Distortion Optimized Streaming of Authenticated Video
Rate-Distortion Optimized Streaming of Authenticated Video
复制标题
已验证视频的率失真优化流式传输
DOI：
10.1109/icip.2006.312677
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
S. Wee
中科院分区：
文献类型：
--
作者：
Zhishou Zhang;Qibin Sun;L. Wong;J. Apostolopoulos;S. Wee
流认证方法通常会增加数据包之间的开销和依赖性。最先进的速率失真 (R-D) 优化流技术的直接应用为经过验证的视频产生了高度次优的 R-D 性能，因为它们没有考虑额外的依赖性。本文通过考虑身份验证依赖性和开销，提出了一种用于身份验证视频的研发优化流技术。它根据数据包在视频质量和身份验证依赖性方面的重要性来调度数据包传输。只要可以根据丢包概率定量计算验证概率，所提出的技术就适用于任何流认证方法。基于 H.264 JM 10.1 和 NS-2 的仿真结果表明，所提出的认证感知 R-D 优化流技术明显优于认证非感知 R-D 优化流技术。特别是，当信道容量低于源速率时，使用传统的 R-D 优化流技术，认证视频的 PSNR 很快下降到不可接受的水平，而所提出的技术仍然保持 R-D 优化视频质量。
Stream authentication methods usually impose overhead and dependency among packets. The straightforward application of state-of-the-art rate-distortion (R-D) optimized streaming techniques produce highly sub-optimal R-D performance for authenticated video, since they do not account for the additional dependencies. This paper proposes an R-D optimized streaming technique for authenticated video, by accounting for authentication dependencies and overhead. It schedules packet transmission based on packets' importance in terms of both video quality and authentication dependencies. The proposed technique works with any stream authentication method as long as the verification probability can be quantitatively computed from packet loss probability. Simulation results based on H.264 JM 10.1 and NS-2 demonstrate that the proposed authentication-aware R-D optimized streaming technique substantially outperforms authentication-unaware R-D optimized streaming techniques. In particular, when the channel capacity is below the source rate, the PSNR of authenticated video quickly drops to unacceptable levels using conventional R-D optimized streaming techniques, while the proposed technique still maintains R-D optimized video quality.