[M4IF Technotes] mpeg4-video : MB-Quant vs 4MV

[Chandra Sekhar Reddy G]

Hi All,
The Mpeg4-Video-Standard prohibits Quant and 4MV to be present in the same
Macroblock.
There may be some cases, where this will be useful.
e.g.., in the encoder,
1. when we do MB-level bit-rate-control, we may need to send Quant, if we do
that, we can not go for 4MV.
2. we may have decided to go for 4MV for that macroblock, if we do that, we
can not do MB-level bit-rate/quality control (by changing Quant).
that means, you have to only one tool, either "MB-level bit-rate/quality
control" or "4MV ".
Why such restriction in the standard?
I think, that choice should have been left for the intelligence of the
Encoder.
Regards,
Chandra