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Abstract

A system, processor, and method are provided for encoding a data block, for example, of digital data. A processor may, from among a plurality of intra frame encoding modes each having a different direction for extrapolating already encoded pixels adjacent to the block, select an intra coding mode having a direction that most closely matches a direction of minimum pixel value change of the block. The processor may compute a predicted intra frame encoding residual data for the block associated with the selected mode based on the difference between the direction of the selected intra frame encoding mode and the direction of minimum pixel value change of the block. The processor may compute inter frame encoding residual data and compare the intra and inter frame encoding residual data. The processor may compress the data block using the intra or inter frame encoding having the smaller residual data.

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