Error concealment for 3-D DWT based video codec using iterative thresholding
Belyaev, Evgeny; Forchhammer, Søren; Codreanu, Marian (2017-04-24)
E. Belyaev, S. Forchhammer and M. Codreanu, "Error Concealment for 3-D DWT Based Video Codec Using Iterative Thresholding," in IEEE Communications Letters, vol. 21, no. 8, pp. 1731-1734, Aug. 2017. doi: 10.1109/LCOMM.2017.2697428
© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe2018080233262
Tiivistelmä
Abstract
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 l 1 -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.
Kokoelmat
- Avoin saatavuus [29694]