| Paper: | IMDSP-L6.1 | ||
| Session: | Interframe Subband/Wavelet Video Coding | ||
| Time: | Friday, May 21, 09:30 - 09:50 | ||
| Presentation: | Lecture | ||
| Topic: | Image and Multidimensional Signal Processing: Image and Video Coding | ||
| Title: | (N,0) MOTION-COMPENSATED LIFTING-BASED WAVELET TRANSFORM | ||
| Authors: | Thomas André; Université de Nice - Sophia Antipolis | ||
| Marc Antonini; Université de Nice - Sophia Antipolis | |||
| Michel Barlaud; Université de Nice - Sophia Antipolis | |||
| Nikola Božinović; Boston University | |||
| Janusz Konrad; Boston University | |||
| Marco Cagnazzo; Université de Nice - Sophia Antipolis | |||
| Abstract: | Motion compensation has been widely used in both DCT- and wavelet-based video coders for years. The recent success of temporal wavelet transform based on motion-compensated lifting suggests that a high-performance, scalable wavelet video coder may soon outperform best DCT-based coders. As recently shown, however, the motion-compensated lifting does not implement exactly its transversal equivalent unless certain conditions on motion are satisfied. In this paper, we review those conditions, and we discuss their importance. We derive a new class of temporal transforms, the so-called N-1 transversal or (N,0) lifting transforms, that are particularly interesting if those conditions are not satisfied. We compare experimentally the 3-1 and 5-3 motion-compensated wavelet transforms for the ubiquitous block-motion model. In this case, the 3-1 transform outperforms the 5-3 transform due to the need to transmit additional motion information in the later case. This result, however, does not apply to motion models satisfying the transversal/lifting equivalence conditions. | ||
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