基于rtpudip协议的H.263编码视频隐藏方案

T.R. Huitika, H. Jeon, Nyeongkyu Kwon, P. Driessen
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引用次数: 0

摘要

具有实时性限制、有限带宽、多播分发和使用rtpudip协议的分组视频必须考虑由于网络拥塞而导致的数据包丢失(具有大的有效负载大小)。一个有效的解决丢包的方法是在接收端进行隐藏。在本文中,我们提出了一种针对“I”帧缺失奇片或偶数片的隐藏方案来解决上述问题。拟议中的隐藏方案使用前一帧宏模块(MB)或MB运动矢量与快速运动估计算法(MV),位于相同的空间位置失踪MB。MB之间的决定或MB MV快速运动估计算法之间的运动是由数量决定的解码上下1像素宽的边界(如果可用)失踪MB和MB位于相同的空间位置在前面的框架。与完全搜索隐藏技术相比,该方案产生了相似的峰值信噪比(PSNR)结果,而中央处理器(CPU)时间减少了30倍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A concealment scheme for H.263 coded video transported over the Internet using the RTPUDPIP protocol
Packet video with real-time constraints, limited bandwidth, multicast distribution, and using the RTPUDPIP protocol must take into account packet losses (with a large payload size) due to network congestion. An effective solution for packet loss is to perform concealment at the receiver. In this paper, we propose a concealment scheme for the 'I' frame missing odd or even slices that address the above problems. The proposed concealment scheme uses the previous frame macroblock (MB) or the MB motion vector (MV) with a fast motion estimation algorithm, located at the same spatial location as the missing MB. The decision between the MB or MB MV with a fast motion estimation algorithm is determined by the amount of motion between the decoded upper and lower 1 pixel wide boundary (if available) of the missing MB and the MB located in same spatial location in the previous frame. The proposed scheme produced similar peak signal to noise ratio (PSNR) results while the Central Processing Unit (CPU) time is reduced by a factor of 30 when compared to the full search concealment technique.
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