[M4IF Technotes] Distortion Testing for Encoder

[Rob Koenen]

> But are there any objective tests for distortion that can be used
> for testing which encoders are better. If distortion is the 
> competitive measure, there
> should be distortion thresholds available that may be used to 
> call some encoders good and some bad.

The point is that there are no encoding quality requirements in the 
MPEG-4 standard. Of course there are many things you can do that go 
beyond the standard. 
NB - Nothing beats human evaluation, and I have yet to see proof that 
anything non-human beats signal-to-noise ratios. (Interestingly, this
point comes up every 2-3 months on this list.)
Best Regards,
Rob