Smooth constrained motion estimation for video coding
Signal Processing
Studying the GOP size impact on the performance of a feedback channel-based Wyner-Ziv video codec
PSIVT'07 Proceedings of the 2nd Pacific Rim conference on Advances in image and video technology
The rate-distortion function for source coding with side information at the decoder
IEEE Transactions on Information Theory
An efficient search strategy for block motion estimation using image features
IEEE Transactions on Image Processing
Rate-distortion optimal motion estimation algorithms for motion-compensated transform video coding
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Wyner–Ziv Video Coding With Universal Prediction
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Perceptual-based distributed video coding
Journal of Visual Communication and Image Representation
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Recently, several distributed video coding (DVC) solutions based on the distributed source coding (DSC) paradigm have appeared in the literature. Wyner-Ziv (WZ) video coding, a particular case of DVC where side information is made available at the decoder, enable to achieve a flexible distribution of the computational complexity between the encoder and decoder, promising to fulfill novel requirements from applications such as video surveillance, sensor networks and mobile camera phones. The quality of the side information at the decoder has a critical role in determining the WZ video coding rate-distortion (RD) performance, notably to raise it to a level as close as possible to the RD performance of standard predictive video coding schemes. Towards this target, efficient motion search algorithms for powerful frame interpolation are much needed at the decoder. In this paper, the RD performance of a Wyner-Ziv video codec is improved by using novel, advanced motion compensated frame interpolation techniques to generate the side information. The development of these type of side information estimators is a difficult problem in WZ video coding, especially because the decoder only has available some reference, decoded frames. Based on the regularization of the motion field, novel side information creation techniques are proposed in this paper along with a new frame interpolation framework able to generate higher quality side information at the decoder. To illustrate the RD performance improvements, this novel side information creation framework has been integrated in a transform domain turbo coding based Wyner-Ziv video codec. Experimental results show that the novel side information creation solution leads to better RD performance than available state-of-the-art side information estimators, with improvements up to 2dB; moreover, it allows outperforming H.264/AVC Intra by up to 3dB with a lower encoding complexity.