Method for reducing code artifacts in block coded video signals

摘要

Digital data representing individual pixels of a video image frame are read and then encoded as a series of binary coded words describing blocks of pixels typically eight by eight for transmission or storage. When the words are decoded an assessment is made as to when a set of pixels representing a region of the video image frame signifying an object at least overlaps into other blocks. Subregions of the blocks in question which make up the whole region are identified and their pixel luminance and chrominance values and these values are interpolated across the region to smooth out transitions across boundaries artificially delimiting the subregions. A library of masks representing luminance values for all the pixels in a block can be made available in order to enhance the compression process.