Graphics Reference
In-Depth Information
18
V-32
19
V-26
20
V-21
21
V-17
22
V-13
23
V-9
24
V-5
25
V-2
26
V0
27
V+2
28
V+5
29
V+9
30
V+13
31
V+17
32
V+21
33
V+26
34
V+32
Fig. 4.5
Angle definitions of angular intra prediction in HEVC numbered from 2 to 34 and the
associated displacement parameters.
H
and
V
are used to indicate the horizontal and vertical
directionalities, respectively, while the numeric part of the identifier refers to the sample position
displacements in 1/32 fractions of sample grid positions. Reproduced with permission from [
8
], ©
2012 IEEE
Tabl e 4. 2
Angular parameter
A
defines the directionality of each angular intra prediction mode
Horizontal modes
M e 2 3 4 5 6789 0 1 2 3 4 5 6 7
A
2 6 1 7 39520
2
5
9
13
17
21
26
Vertical modes
Mode
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
A
32
26
21
17
13
9
5
20259 3 7 1 6
array. For the modes with positive angular parameter
A
(
vertical modes 26 to 33
and horizontal modes 2 to 10
) the 1-D reference array is simply created by copying
reference samples from the direction of the prediction:
