An Error Concealment Scheme for Entire Frame Losses for H.264/AVC

In this paper, an error concealment scheme is proposed to conceal an entirely lost frame in a compressed video bitstream due to errors introduced during transmission. The proposed scheme targets low bit rate video transmission applications using H.264/AVC. The motion field of the lost frame is first reconstructed by copying the co-located motion vectors and reference indices from the last decoded reference frame. After the motion field estimation of the missing frame, motion compensation is performed to reconstruct the frame. This technique reuses existing modules of the video decoder and it does not incur extra complexity compared to decoding a normal frame. It has also been adopted as a non-normative decoder option to the JM reference software at the JVT meeting in Poznan, Poland in July 2005 [1] and has been incorporated into the SA4 video ad hoc group's toolkit at the 3GPP meeting at Paris [2] in September 2005. Simulation results will show its improved performance over other simple error concealment schemes such as "frame copy," both subjectively and objectively, without significant complexity overhead.