A new hybrid error concealment scheme for H.264 video transmission

  • Authors:

  • Wei-Lin Chen;Jin-Jang Leou

  • Affiliations:

  • National Chung Cheng University, Chiayi, Taiwan;National Chung Cheng University, Chiayi, Taiwan

  • Venue:
  • Proceedings of the 2006 international conference on Wireless communications and mobile computing
  • Year:
  • 2006

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Abstract

For an entropy-coded video bitstream, a transmission error in a codeword will not only affect the underlying codeword but may also affect subsequent codewords, resulting in a great degradation of received video frames. In this study, a new hybrid error concealment scheme for H.264 video transmission is proposed. Here, pixel interpolation and the fast best neighborhood matching (BNM) algorithm are employed to conceal intra-coded I frames. For inter-coded P frames, the predicted motion vector (PMV) for a corrupted block is first determined by the spatial MVs around the corrupted block and the corresponding temporally motion-projected overlapping MVs in the previous frame. Then based on the PMV, the optimal candidate concealed block for a corrupted block is searched over all the motion-compensated blocks in the previous frame with their MVs being determined by all the available spatial and temporal information. After all the corrupted blocks in a P frame are initially concealed, error concealment refinement is performed on all the initial concealed blocks to improve the error concealment results. Based on the simulation results obtained in this study, the performance of the proposed scheme is better than that of the corresponding comparison schemes.