Join Date: Sep 2000
Location: Marin County, CA
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ptelles is on the right track here - from what I understand of this problem coming at it from a game perspective is that its extremely difficult to hide banding with this type of vivid computer-generated material. In fact, depending on how the film was transferred or projected, I wouldn't be surprised if there's banding in the theaterical presentations...
The problem is, as he stated, there are just not enough bits in the current color-processing pipeline to hide this completely. Real photography hides it better, due to a combination of film grain and more variation on color on "real world" objects, but a computer-generated gradient like you'd find in a cartoony-CG movie is just brutal on the colorspace.
Until we have "deep color" this will be a persistent problem in certain types of content, I think. All the common solutions videogame developers use like dithering just end up adding noise of the picture to cover up unavoidable banding. I'm not sure anyone wants their copy of Ice Age to look like Miami Vice.
I don't think just because HDMI can support deep-color means BD or HD-DVD will be able to support it, their chipsets are (presumably) geared around processing in a particular color-space for display and can't have those pathways upgraded.
Anyway, doubt its compression-induced. This sort of material should be very easy to compress w/o artifacts. These are a different sort of artifact.