High Efficiency Video Coding
HEVC builds upon H.264/MPEG-4 AVC concepts. Both analyze video frames for redundancies within and between frames. Redundant parts are replaced with concise descriptions. HEVC enhances this by expanding comparison areas up to 64x64 pixels, refining variable-block-size segmentation, enhancing "intra" prediction within frames, improving motion prediction and compensation, and adding sample-adaptive offset filtering. These improvements increase compression processing, but decompression is less affected.