generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

remove low pass filtering from two 4x4 intra prediction

Browse Source 
In the process of developing new intra prediction modes, tests have
shown removal of the low pass filtering from B_HE_PRED and B_VE_PRED
has an overall minor positive impact in both PSNR and SSIM metric.
Overall difference is about 0.1%. The change shall also have a small
positive impact on speed. Intuitively, this change should also reduce
some of the tendency of "flattening"

Change-Id: I3c43b0daca833c6eff77d00f19c811f9ef9368a3
This commit is contained in:
Yaowu Xu 2010-11-01 14:04:01 -07:00
parent 39ceef38a7
commit 0867b81678
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
vp8/common/reconintra4x4.c
View File

@ -81,10 +81,10 @@ void vp8_predict_intra4x4(BLOCKD *x,
{
unsigned int ap[4];
ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2;
ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2;
ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2;
ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2;
ap[0] = Above[0];
ap[1] = Above[1];
ap[2] = Above[2];
ap[3] = Above[3];
for (r = 0; r < 4; r++)
{
@ -105,10 +105,10 @@ void vp8_predict_intra4x4(BLOCKD *x,
{
unsigned int lp[4];
lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2;
lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2;
lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2;
lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2;
lp[0] = Left[0];
lp[1] = Left[1];
lp[2] = Left[2];
lp[3] = Left[3];
for (r = 0; r < 4; r++)
{