Hybrid temporal/spatial error concealment strategy robust to scene transitions

Abstract

Error Concealment (EC) techniques attempt to reconstruct the lost area of a frame in a video sequence using spatial and/or temporal correlation. Temporal error concealment (TEC) performs better than the spatial error concealment (SEC) in terms of PSNR of the reconstructed macroblocks. However, the performance of TEC deteriorates drastically in presence of scene transitions due to lack of temporal correlation. In this paper, we propose an encoder driven scene transition detection which would facilitate error resilience at the encoder and concealment at the decoder. A new edge-direction based spatial error concealment scheme termed DEBSEC is also proposed.