slavka

Mr Johnson, that fuzzy region on your X-ray indicates one of two things. Either you have multi-drug resistant tuberculosis, or the copy-protection system on our computer thinks that part of your left lung looks like Mickey Mouse.

Alongside the all-or-nothing approach of disabling output, Vista requires that any interface that provides high-quality output degrade the signal quality that passes through it if premium content is present. This is done through a “constrictor” that downgrades the signal to a much lower-quality one, then up-scales it again back to the original spec, but with a significant loss in quality. So if you're using an expensive new LCD display fed from a high-quality DVI signal on your video card and there's protected content present, the picture you're going to see will be, as the spec puts it, “slightly fuzzy”, a bit like a 10-year-old CRT monitor that you picked up for $2 at a yard sale (see the Quotes for real-world examples of this). In fact the specification specifically still allows for old VGA analog outputs, but even that's only because disallowing them would upset too many existing owners of analog monitors. In the future even analog VGA output will probably have to be disabled. The only thing that seems to be explicitly allowed is the extremely low-quality TV-out, provided that Macrovision is applied to it (see the Decreased System Reliability section for further discussion of Macrovision problems with Windows).

The same deliberate degrading of playback quality applies to audio, with the audio being downgraded to sound (from the spec) “fuzzy with less detail” [Note G].

Amusingly, the Vista content protection docs say that it'll be left to graphics chip manufacturers to differentiate their product based on (deliberately degraded) video quality. This seems a bit like breaking the legs of Olympic athletes and then rating them based on how fast they can hobble on crutches.

The Microsoft specs say that only display devices with more than 520K pixels will have their images degraded (there's even a special status code for this, STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH), but conveniently omit to mention that this resolution, roughly 800x600, covers pretty much every output device that will ever be used with Vista. The abolute minimum requirement for Vista Basic are listed as 800x600 resolution (and an 800MHz Pentium III CPU with 512MB of RAM, which seems, well, “wildly optimistic” is one term that springs to mind). However that won't get you the Vista Aero interface, which makes a move to Vista from XP more or less pointless. The minimum requirements for running Aero on a Vista Premium PC are “a DX9 GPU, 128 MB of VRAM, Pixel Shader 2.0, and minimum resolution 1024x768x32”, and for Aero Glass it's even higher than that. In addition the minimum resolution supported by a standard LCD panel is 1024x768 for a 15" LCD, and to get 800x600 you'd have to go back to a 10-year-old 14" CRT monitor or something similar. So in practice the 520K pixel requirement means that everything will fall into the degraded-image category.

(A lot of this OPM stuff seems to come straight from the twilight zone. It's normal to have error codes indicating that there was a disk error or that a network packet got garbled, but I'm sure Windows Vista must be the first OS in history to have error codes for things like “display quality too high”).

http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.html