The authors propose efficient hybriderror resilience and error concealment (er-ec) algorithms for H.264 3D video-plus-depth (3DV+D) transmission overerror-prone channels. At the encoder, content-adaptive pre-process...
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The authors propose efficient hybriderror resilience and error concealment (er-ec) algorithms for H.264 3D video-plus-depth (3DV+D) transmission overerror-prone channels. At the encoder, content-adaptive pre-processing er mechanisms are implemented by applying the context adaptive variable length coding (CAVLC), the slice structured coding, and the explicit flexible macro-block ordering. At the decoder, a post-processing ec algorithm with multi-proposition schemes is implemented to recover the lost 3DV colour frames. The convenient ec hypothesis is adopted based on the lost macro-blocks size mode, the faulty view, and the frame types. For the recovery of the lost 3DV depth frames, an encoder-independent decoder-dependent depth-assisted ec algorithm is suggested. It exploits the previously estimated colour disparity vectors (DVs) and motion vectors (MVs) to estimate more additional depth-assisted MVs and DVs. After that, the optimum colour-plus-depth DVs and MVs are accurately selected by employing the directional interpolation ec algorithm and the decoder MV estimation algorithm. Finally, a weighted overlapping block motion and disparity compensation scheme is utilised to reinforce the performance of the proposed hybrid er-ec algorithms. Experimental results on standard 3DV+D sequences show that the proposed hybridalgorithms have superior objective and subjective performance indices.
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