Graphics Reference
In-Depth Information
Fig. 5.
Rate-distor
rtion performance using PSNR for parameter TileSize
We can see from Fig. 5 th
and the PSNR gain is amo
between 512x512 and 3840
nents (U, V). Totally speak
the influence of tile size on
•
hat 512x512 and 3840x2160 perform better than 128x
ong 0.1~0.3db, whereas there shows almost no differe
0x2160. The same result is also shown in Chroma com
king, the influence of tile size on PSNR result is small
the memory size is large [5].
128
ence
mpo-
but
Overlap filter (OF)
There are 3 values to be sel
ected:
─
0: Overlap filter is not us
─
1: Overlap filter is used i
─
2: Overlap filter is used b
sed neither in first step nor in second step
in first step
both in first step and in second step
The rate-distortion result in
is shown in Fig. 6 and Fig. 7
n terms of PSNR and SSIM on both Y and UV compon
7.
nent
Fig. 6.
Rate-distortion perform
mance using PSNR and SSIM for parameter OF on Y compon
nent
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