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9 January 1998 Generalized motion compensation for drift reduction
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Proceedings Volume 3309, Visual Communications and Image Processing '98; (1998)
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States
The most straight-forward approach in obtaining a down- converted image sequence is to decimate each frame after it has been fully encoded. To reduce memory requirements and other costs incurred by this approach, a down-conversion decoder would perform a decimation within the decoding loop. In this way, predictions are made from a low-resolution reference which has experienced a considerable loss of information. Additionally the prediction s must be made from a set of motion vectors which correspond to the full- resolution image sequence. Given these conditions, it is desirable to optimize the performance of the motion compensation process. In this paper we show that the optimal set of filters for performing the low-resolution motion compensation are dependent on the choice of down-conversion are provided. To demonstrate the usefulness of these results, a sample set of motion compensation filters for each class of down-conversion are calculated. The results are incorporated into a low-resolution decoder and comparisons of each down-conversion class are made. Simulation results reveal that the filters which were based on multiple block down-conversion can reduce the amount of prediction drift found in the single block down-conversion by as much as 35 percent.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anthony Vetro and Huifang Sun "Generalized motion compensation for drift reduction", Proc. SPIE 3309, Visual Communications and Image Processing '98, (9 January 1998);


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