[Mp4-tech] global motion compensation (GMC)

[Sandip Ray]

Hi,
The global motion estimation generates VOP level parameters for S(GMC)-VOP
in MPEG 4 bitstream. I don't think it generates any macroblock level
parameters (e.g. motion vector). The macroblock type within a S(GMC)-VOP can
be intra, inter, gmc or not coded. I understand GMC parameters capture
camera motion rather than object motion.
Are there any macroblock types where motion vectors are used along with
global motion compensated VOP to capture both of camera motion and object
motion ? Please clarify my doubt and whether any of my understanding is not
correct.
Thanks,
Sandip
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