Spatio-Temporal Error Concealment Scheme Using Hybrid Algorithm with Postprocessing

In video streaming there is a problem of packet-loss during signal transmission. Because of this fact the quality of the video could be highly distorted. Different error concealment schemes are used at the decoder side or even after decoding process to fight this. In this paper a new spatio-temporal error concealment scheme with low computational complexity and high visual and objective quality is proposed. The algorithm exploits temporal information for finding the best candidate macroblock (MB) from previous frame to replace lost MB in current frame. After this step concealment estimation is performed. If concealment led to high discontinuities along the border of the restored block another temporal concealment algorithm is used or even spatial one if temporal concealment couldn’t give high-quality result. The algorithm was tested on 10 videos with different characteristics and results were compared to famous error concealment algorithms that work mainly in temporal domain.