In the field of image coding, it has recently been shown that quad-tree schemes for representing geometric image features are unable to obtain the optimal exponentially decaying rate-distortion behaviour - a problem which can be rectified by following R-D optimal tree pruning with a leaf merging step. Inspired by such results, we note that quad-tree based motion representations for video compression suffer from the same fundamental shortcomings, which can again be overcome by leaf merging. Based on these observations, we describe a non-iterative low complexity extension to the existing motion model used by H.264, demonstrating significant improvements in overall compression performance. At low to moderate bit-rates, our experimental implementation yields reductions of 10% or more in overall bit-rate, relative to H.264. Perhaps more importantly, this paper reinforces the importance of leaf merging as a general tool for quad-tree based modeling schemes.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    On the benefits of leaf merging in quad-tree motion models


    Contributors:


    Publication date :

    2005-01-01


    Size :

    318949 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    On the Benefits of Leaf Merging in Quad-Tree Motion Models

    De Forni, R. / Taubman, D. S. | British Library Conference Proceedings | 2005


    Motion estimation using quad-tree phase correlation

    Argyriou, V. / Vlachos, T. | IEEE | 2005


    Motion Estimation using Quad-Tree Phase Correlation

    Argyriou, V. / Vlachos, T. | British Library Conference Proceedings | 2005



    Fast Adaptive Hybrid Mesh Generation Based on Quad-tree Decomposition

    Ebeida, M. / Davis, R. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2008