Posterising

[GlenR]

I have noticed instances of posterising lately. Mainly in the shadow areas on darker close-ups of faces. The area under the chin and on the neck occassionally posterise badly going quite magenta and without detail.

I first noticed it on Underbelly, but notcied it on Channel 10 last night.

I have updated my graphics drivers recently, but I'm fairly sure this started prior to that, and nothing else has changed. Has anybody else seen this?

I'm not sure if it's a transmission/station thing or my settings, so i want some opinion from here before I try and play around with my previously satisfactory setups.

[logifuse]

Yeah I'm seeing it more (if we're talking about the same thing - instead of a smooth colour tone transition, it steps like isobars on a weather map?).

I'm a video driver junkie, so I don't know if it's drivers or transmission - I suspect the latter. I think there is experimentation going on with the transmissions in an effort to reduce macro-blocking - the cost being colour smoothness.

Justin