Information Technology Reference
In-Depth Information
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DC
prediction
Plane
prediction
Example of predicted
signal by Plane prediction
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Fig. 34
Intra 16x16 prediction
Fig. 35
Intra 4x4 prediction
In AVC/H.264, Motion Compensated Prediction can be performed by referring
two or more reference frames. That is, the frames of the past and the future are
stored in the frame memory, and can be chosen as reference frames for each block
partition greater than 8x8 sub-blocks. B slices in AVC/H.264 support prediction
from two reference pictures and the combination of the two pictures can be freely
chosen. In contrast to MPEG-2, it is possible to perform bi-prediction even from
two past pictures or two future pictures.
In AVC/H.264, 4x4 and 8x8 Integer Transform has been adopted for the con-
version from spatial domain to frequency domain; the integer transform ensures
that there is no mismatch between encoder and decoder. However, some parts of
the transform process are included in quantization and de-quantization processing.
