A multi-step temporal error concealment method

H.264/AVC has been deployed in various multimedia communication systems such as mobile TV and Internet video streaming systems. However, it suffers from various packet losses in transmission. Temporal error concealment is a kind of decoder-based error resilient solution without transmission delay. In this paper, a multi-step temporal error concealment scheme is proposed to improve the error concealment quality. The 4×4 sub-block partition is adopted as the motion vector recovery unit and motion vector recovery is done for edge motion vectors. An early termination method is also used to reduce some part of computation complexity. Furthermore, a weighted boundary matching algorithm is proposed to avoid error propagation. The experimental results show that our proposed scheme can obtain better video quality than conventional approaches.