Abstract:In block coding techniques a harmful effect is the gap between blocks. The mosaic effect is important in smooth areas. In block coding techniques, the subjective quality depends on the mosaic effect. Among regions and on edge zones the mosaic effect is less injurious than in smooth areas. If the difference between blocks coincides with contour areas the visual effect almost disappears. The objective is to select a block with contour boundaries. Then another problem appears. It is not possible to select a regul… Show more
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