一种基于运动跟踪的帧内刷新技术

An intra refreshment algorithm based on motion tracking

摘要:

为提高帧内刷新算法的抗传输差错能力,提出了一种基于运动跟踪的帧内刷新算法。首先,在相邻两个帧内刷新帧之间对运动影响区域内的宏块进行统计分析,选取对传输差错敏感的宏块进行帧内刷新。其次,对刷新帧后的帧间预测帧进行参考特性限制,进一步防止传输差错在帧内和帧间的扩散。实验结果表明,在多种丢包环境下,该算法与自适应帧内刷新算法相比,重建图像的峰值信噪比(PSNR)平均提高1 dB以上,主观质量明显提高,且运算复杂度低。

Abstract:

An intra refreshment algorithm based on motion tracking is proposed to improve the performance of error resilience.First,for every frame between two sequential intra refreshed frames,the blocks affected by motion are statistically analyzed,and the blocks which are sensitive to transmission errors are selected as intra refreshed macroblocks.Second,to suppress the potential spatial and temporal error propagation,the reference number of the inter predicted frame which is behind an intra refreshed frame is limi...