EURASIP Journal on Applied Signal Processing
Multimedia Tools and Applications
A temporal approach for improving intra-frame concealment performance in H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Mixture model-and least squares-based packet video error concealment
IEEE Transactions on Image Processing
Robust mobile video streaming in a peer-to-peer system
Image Communication
Hi-index | 0.07 |
In this paper, we propose a two-stage error-concealment method for block-based compressed video which was transmitted in an error-prone environment. In the first stage, we obtain initial estimates of the missing blocks. If the motion vectors associated with the missing blocks are available, motion compensation is used to provide good estimates. Otherwise, a novel algorithm which preserves image continuity is used to estimate the blocks. In the second stage, a maximum a posteriori (MAP) estimator, which employs an adaptive Markov random field (MRF) as the image a priori model is used to improve the video reconstruction quality. The adaptive model enables the estimation to incorporate information embedded not only in the immediate neighborhood pixels but also in a wider neighborhood into the reconstruction procedure without increasing the order of the MRF model. The proposed concealment method achieves very good computation-performance tradeoffs, as demonstrated via experimental results