[M4IF Technotes] brightness change for sprites

[axel.binder philips.com]

Hi together,
I have a question about the brightness_change_factor in 14496-2 Amd.1 in 
chapter 7.8.6.
In the spec this factor is defined for the Y channel for static sprite and 
GMC sprite decoding, right?
However in the reference code (14496-5 from ISO) I couldn't find it's 
usage during decoding neither in the 
Microsoft nor in the MoMuSys implementation. It is encoded to the stream 
and decoded from the bitstream 
but during sample reconstruction it is ignored. 
Now my question: Do I need to take care of this factor for a compliant 
sprite decoder implementation
or can it be ignored?
Another question, is there anybody out there who sets this factor (to non 
trivial values == 1) during encoding?
regards
axel binder
=======================================================
Axel Binder                                              Philips Starnberg 
(SP3D)
Development Manager Software    Petersbrunner Str. 17
 D-82319 Starnberg, Germany
phone:  +49 8151 270 108 
fax:         +49 8151 270 200
mobile: +49 172 92 18 623
e-mail: axel.binder   philips.com
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