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Motion compensated frame interpolation (MCFI) is one of the most efficient solutions to generate side information (SI) in the context of distributed video coding. However, it creates SI with rather significant motion compensated errors for some frame regions while rather small for some other regions depending on the video content. In this paper, a low complexity intra mode selection algorithm is proposed...
In this paper, a distributed video coding technique with prioritized channel coding of W-Z frames is presented. In the proposed framework, W-Z frame macroblocks are classified into different groups based on the estimated quality of the side information. The information is transmitted via uplink channel back to the encoder so that macroblocks with similar error statistics can be grouped tighter in...
An auto-regressive (AR) based side information (SI) generation is proposed in this paper for block based chessboard pattern Wyner-Ziv (WZ) coding, where each WZ frame is split into two sets at encoder and then encoded separately. At the decoder, one set of the WZ frame will be firstly reconstructed, and then proposed AR model is used to generate the SI of the other set, where each pixel is generated...
This paper presents a concealment based approach to distributed video coding that uses hybrid key/WZ frames via an FMO type interleaving of macroblocks. Our motivation stems from a previous work of ours that showed promising results relative to the more common approach of splitting the sequence in key and WZ frames. In this paper, we extend our previous scheme to the case of I-B-P frame structures...
The function of interleavers in turbo codes are analyzed and the disadvantages of some existing interleavers are pointed out. Two novel interleavers, named block-based S-random interleaver (BSI) and pseudo random-based S-random interleaver (PRSI) respectively, are designed and simulated. Compared to some existing interleavers, the designed interleavers have better performance in aspects of iteration...
This paper presents a transform-domain distributed video compression (DVC) system with block-adaptive Wyner-Ziv coding. In the proposed system, the source symbols are reformatted into several blocks. The parity bits are requested only for the blocks with decoding errors. More accurate placement of the parity bits results in an improved system performance that is much closer to the performance of H...
The following topics were dealt with: stochastic video model; half-pel accurate motion-compensated orthogonal video transforms; spatial sparsity induced temporal prediction; hybrid video compression; order-1 normalized maximum likelihood model; DNA sequence compression; biological sequence compression; structure induction; lossless graph compression; multiple-description coding; dithered delta-sigma...
In this paper, we present a distributed video coding scheme based on low punctured turbo codes and zero motion encoding strategy. Most recent distributed video coding schemes have a common structure: the encoded bit streams consist of both side information derived from previous frames and syndrome bits derived from channel coding such as Turbo codes. Turbo codes are often punctured to generate scalable...
This paper presents a novel video compression system with a low complexity encoder. Based on the Slepian-Wolf theorem and the Wyner-Ziv theorem, a video is intraframe coded and interframe decoded in this system. The system performance, the compression rate and the video quality, is affected by the difference between the source information and the side information. To increase the accuracy of the side...
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