Image Processing Transform Coding Using the Residual Quadtree (RQT)
InHEVC,eachpictureisdividedintocodingtreeblocks(CTBs).ACTBisasquareblockandrepresentstherootofaquadtree,i.e.,thecodingtree.TheCTBsizemayrangefrom8×8to64×64lumasamples,buttypically64×64isused.EachCTBca