Pls explain difference between Posterization & Banding artifcacts

[countryMouse]

I'm new to this forum, and I must say, this place is jam-packed with information. I'm going to be spending a LOT of time browsing and learning.


My question ---
I've scanned a bit in several forums and Wikepedia, and the few example screen-shots I found make these two phenomena look the same.

If I understand correctly, both are caused by using a too-low bit setting. I have an avi video capture (used Huff to YUY2) that looks very smooth. But it then shows these type of artifacts when I try to use AviSynth filters to brighten and intensify the color, even though I have VirtualDubMod set for 24-bit output.

Please, can someone explain the difference between banding and posterization? How to prevent them? How to correct them?

any advice will be most appreciated.
Thanks

[countryMouse]

Hi blutach. Thank you for the welcome

and thanks even more for the link, I hope it will answer my questions.

[blutach]

I accidently killed the post. Sorry.

It is more in line for MPEG 2 encoding, anyway.

Here's the link again - http://www.doc.ic.ac.uk/~nd/surprise...ab/report.html

And

Regards

[countryMouse]

thanks for explaining the vanishing post.
I slipped into the Twilight Zone there for a moment.