An error resilience technique based on FMO and error propagation for H.264 video coding in error-prone channels
An error resilience technique based on FMO and error propagation for H.264 video coding in error-prone channels
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基于 FMO 和错误传播的错误恢复技术，适用于易错通道中的 H.264 视频编码
DOI：
10.1109/icme.2009.5202472
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
S. Aramvith
中科院分区：
文献类型：
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作者：
Tien Huu Vu;S. Aramvith
灵活宏块排序（FMO）是H. 264中的一种新的错误恢复技术，可用于减轻易出错环境中的错误影响。使用FMO，每个宏块可以通过使用宏块分配图（MBAmap）独立地分配给特定的切片组。FMO工具取决于宏块的排序方式，已经提出了各种减少MBAmap创建过程中错误的方法。然而，这些方法通常集中在如何减少帧内错误宏块的影响，而没有考虑帧间的错误传播问题。本研究集中于估计当前帧的损坏宏块对下一帧以及同一切片组中的其它宏块所造成的影响。这些效应可以用于评估当前帧中宏块的重要性，并且可以生成具有减小的误差传播效应的合适的映射。实验结果表明，与不考虑帧间误差传播影响的方法相比，该方法在峰值信噪比（PSNR）和不可解码宏块数目上都有较大的改善。
Flexible Macroblock Ordering (FMO) is one of the new error resilience techniques in H.264 that can be used to mitigate the effects of error in error prone environments. Using FMO, each macroblock can be assigned independently to a certain slice group by using a macroblock allocation map (MBAmap). FMO tool depends on how the macroblocks are ordered, and various methods of reducing the error during MBAmap creation have been proposed. However, these methods usually focused on how to reduce the effects of error macroblocks within a frame while the issue of error propagation between frames has not been considered. This study concentrates on estimating the effects caused by the damaged macroblocks of the current frame to the next frame and the other macroblocks in the same slice group. These effects can be used in the evaluation of the macroblocks' importance in the current frame, and a suitable map with a reduced effect of error propagation can be generated. Results show that this method has improvements in PSNR and the number of undecodable macroblocks when compared to the other methods that did not take the effects of inter-frame error propagation into consideration.