MPEG-2 error concealment based on block-matching principles
IEEE Transactions on Circuits and Systems for Video Technology
A cell-loss concealment technique for MPEG-2 coded video
IEEE Transactions on Circuits and Systems for Video Technology
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In the transport of compressed video over error prone channels, motion vectors and displaced frame differences may be lost or received with errors. The effect of such information losscan be devastating because any demage to the motion vector may lead to severe error proposation and signifant visual distortion over several video frames at the decoder. To resolve such problem, several block-matching based techniques have been proposed to conceal the transfort error. However, the corresponding computational expense required by these schemes has been too intensive for a practical video decoder. In this paper, we introduce a technique that makes use of correctly received motion vectors of neighboring macroblocks around the lost macroblock to achive an effective block-matching. This technique enables us to reduce the computational expense to a great extent. Experiment results show that the proposed error concealment method can produce a high quality video while consuming reasonable computational power.