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80 4 Progressive Fine Granularity Scalable (PFGS) Coding
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Picture
Buffer 0
Picture
Buffer 1
Find
Max
Bit Plane
ME
MC
DCT
IDCT
VLC
IDCT
DCT
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Bitstream
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n(t)
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Base Layer
Encoder
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Video
S
Enhancement
Layer Encoder
HQPD
LQPD
Figure 4.9 Encoding diagram of the improved PFGS framework.
to save a reconstructed enhancement layer in a previous picture as a reference for
coding all enhancement layers.
The base layer encoding is the same as that of baseline FGS, which can be compat-
ible with other standards, such as MPEG-2, MPEG-4, and H.263. The motion estima-
tion (ME) module gets the motion vectors between two adjacent original pictures and