Graphics Reference
In-Depth Information
Planar mode
DC mode
0
1
Angular modes
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Fig. 4.2
8 luma prediction blocks generated with all the HEVC intra prediction
modes. Effects of the prediction post-processing can be seen on the top and left borders of the DC
prediction (mode 1), top border of horizontal mode 10 and left border of vertical mode 26
Examples of 8
4.2
Reference Sample Generation
The intra sample prediction in HEVC is performed by extrapolating sample values
from the reconstructed reference samples as defined by the selected intra prediction
mode. Compared to the H.264/AVC, HEVC introduces a reference sample substitu-
tion process which allows HEVC to use the complete set of intra prediction modes
regardless of the availability of the neighboring reference samples. In addition, there
is an adaptive filtering process that can pre-filter the reference samples according to
the intra prediction mode, block size and directionality to increase the diversity of
the available predictors.
