
Figure 14.2 MPEG
group of
pictures
(GOP). The GOP
depicted here has nine pictures,
numbered 0 through 8. I-picture 0
is decoded from the coded data
depicted in the dark gray block.
Picture 9 is not in the GOP; it is
the first picture of the next GOP.
Here, the
intra count (n)
is 9.
a new anchor. I-pictures and P-pictures form a two-
layer hierarchy. An I-picture and two dependent
P-pictures are depicted in Figure 14.3 below.
AAPEG provides an optional third hierarchical level
whereby
B-pictures
may be interposed between anchor
pictures. Elements of a B-picture may be bidirectionally
predicted by averaging