Ahead of Print article · Journal article
Error Concealment for 3-D DWT Based Video Codec Using Iterative Thresholding
Error concealment for video coding based on a 3-D discrete wavelet transform (DWT) is considered. We assume that the video sequence has a sparse representation in a known basis different from the DWT, e.g., in a 2-D discrete cosine transform basis. Then, we formulate the concealment problem as l1-norm minimization and solve it utilizing an iterative thresholding algorithm.
Comparing different thresholding operators, we show that video block-matching and 3-D filtering provide the best reconstruction by utilizing spatial similarity within a frame and temporal similarity between neighbor frames. Experimental results show that the proposed error concealment provides up to 6-dB improvement in the peak signal-to-noise ratio in comparison with existing recovery methods.
Language: | English |
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Publisher: | IEEE |
Year: | 2017 |
Pages: | 1731-1734 |
ISSN: | 23737891 , 10897798 and 15582558 |
Types: | Ahead of Print article and Journal article |
DOI: | 10.1109/LCOMM.2017.2697428 |
ORCIDs: | Belyaev, Evgeny and Forchhammer, Søren |