Motion estimation and signaling techniques for 2D+t scalable video coding
EURASIP Journal on Applied Signal Processing
Motion driven adaptive transform based on wavelet transform for enhanced video coding
MobiMedia '06 Proceedings of the 2nd international conference on Mobile multimedia communications
Spatial-aided low-delay Wyner-Ziv video coding
Journal on Image and Video Processing - Special issue on distributed video coding
Perceptual optimization for scalable video compression based on visual masking principles
IEEE Transactions on Circuits and Systems for Video Technology
An attention emphasized bit arrangement in 3-D SPIHT video coding for human vision
Journal of Visual Communication and Image Representation
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We investigate the implications of the conventional "t+2-D" motion-compensated (MC) three-dimensional (3-D) discrete wavelet/subband transform structure for spatial scalability and propose a novel flexible structure for fully scalable video compression. In this structure, any number of levels of "pretemporal" spatial wavelet decomposition are performed on the original full resolution frames, followed by MC temporal decomposition of the subbands within each spatial resolution level. Further levels of "posttemporal" spatial decomposition may be performed on the spatiotemporal subbands to provide additional levels of spatial scalability and energy compaction. This structure allows us to trade energy compaction against the potential for artifacts at reduced spatial resolutions. More importantly, the structure permits extensive study of the interaction between spatial aliasing, scalability and energy compaction. We show that where the motion model fails, the "t+2-D" structure inevitably produces misaligned spatial aliasing artifacts in reduced resolution sequences. These artifacts can be removed by using pretemporal spatial decomposition. On the other hand, we also show that the "t+2-D" structure necessarily maximizes compression efficiency. We propose different schemes to minimize the loss of compression efficiency associated with pretemporal spatial decomposition.