1 December 1991 Hierarchical motion-compensated interframe DPCM algorithm for low-bit-rate coding
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Abstract
The block-based motion estimation algorithm we have previously proposed possesses the advantages of a high estimation accuracy and a good prediction performance. It can efficiently be employed in a motion-compensated DPCM coder to minimize the data bits for the transmission of prediction errors. However, the motion overhead data rate, although it has been compressed dramatically by the coding method we proposed, is still too high to work at very low bit-rates like 64 kb/s. In this paper, a hierarchical motion-compensated interframe DPCM algorithm is presented to cope with low bit rates coding. In the meanwhile, the motion- compensated prediction error images are encoded by a hierarchical quadtree structure coder, which is more efficient and simpler than the commonly adopted DCT transform coding for the prediction errors. Experimental results show that an excellent performance has been obtained for very low bit rate coding. The signal-to-noise ratios of the reconstructed luminance images on average are about 37.5 to 38 db at 0.05 bits/pel and 38.7 to 39.5 db at 0.09 bits/pel for the sequences examined.
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Kan Xie, Kan Xie, Luc Van Eycken, Luc Van Eycken, Andre J. Oosterlinck, Andre J. Oosterlinck, } "Hierarchical motion-compensated interframe DPCM algorithm for low-bit-rate coding", Proc. SPIE 1567, Applications of Digital Image Processing XIV, (1 December 1991); doi: 10.1117/12.50832; https://doi.org/10.1117/12.50832
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