Improving Intra Mode Coding in H.264/AVC Through Block Oriented Transforms
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Overview: This paper is a pre-processing stage based on block orientation that significantly improves H.264 at all bitrates In an H.264 video encoder, the important task of intra coding is performed in the residual domain after a spatial transform has been applied to the block data. Although the intra prediction is very efficient and shows the ability to capture some orientations of the image, after this spatial prediction the intra residual may still show regular structures. The paper utilizes a rate-distortion algorithm. The paper further proposes to calculate the real orientation of the block to decrease the amount of computation.