Graphics Reference
In-Depth Information
Tabl e 4. 8
Key differences of intra prediction techniques between H.264/AVC and HEVC
Functionality
H.264/AVC
HEVC
Prediction block sizes
4
4, 8
8 and 16
16
4
4, 8
8, 16
16 and 32
32
Luma intra prediction modes
9 (4 4and8 8), 4
(16 16)
35
Chroma intra prediction modes
4
4 C the luma mode
Reference sample smoothing
8 8
8 8 and above
Boundary smoothing
N/A
Used for directly horizontal,
vertical and DC modes
Operation when reference
samples missing
Use DC mode
Reference sample substitution
Number of most probable
modes in mode coding
1
3
References
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