ref: 56e6c66b498e4d71eae35af54b00bbf7d00ab4de
parent: 6b1b34177491351fb15613637bd1667ced34c5ac
author: Tero Rintaluoma <teror@google.com>
date: Wed Feb 13 10:18:41 EST 2013
Avoid division in intra prediction - Using multiplication and shifting instead of division in intra prediction. - Maximum absolute difference is 1 for division statements in d45, d27, d63 prediction modes. However, errors can cumulate for large block sizes when using already predicted values. - Maximum number of non-matching result values in loops using division are: 4x4 0/16 8x8 0/64 16x16 10/256 32x32 13/1024 64x64 122/4096 Overall PSNR derf: 0.005 yt: -0.022 std-hd: 0.021 hd: -0.006 Change-Id: I3979a02eb6351636442c1af1e23d6c4e6ec1d01d