I"m not sure that I understand your question but I'll try and answer
it.
MPEG2 and MPEG4 video standards are determined by a committee that
Sony may or may not be a part of.
As a software manufacturer, their job is to ensure that the videos
produced by their software meet these standards for playback purposes
in a variety of hardware and software devices.
The biggest problem is that a lot of these standards are only
"recommended", not mandatory, which gives all software companies a lot
of leeway in meeting them.
Does that answer your question?
Mike