KGK
1200
Jag har inte hunnit läsa hela men det verkar ju sådär lagomt bra.
http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt
The Vista Content Protection specification could very well constitute the
longest suicide note in history.
"Vista's content protection mechanism only allows protected content to be
sent over interfaces that also have content-protection facilities built
in. ... Since S/PDIF doesn't provide any content protection, Vista
requires that it be disabled when playing protected content. In other
words if you've invested a pile of money into a high-end audio setup fed
from a digital output, you won't be able to use it with protected
content. Similarly, component (YPbPr) video will be disabled by Vista's
content protection, so the same applies to a high-end video setup fed from
component video."
"So the instant any audio derived from premium content appears on your
system, signal degradation and disabling of outputs will occur. What
makes this particularly entertaining is the fact that the
downgrading/disabling is dynamic, so if the premium-content signal is
intermittent or varies (for example music that fades out), various outputs
and output quality will fade in and out, or turn on and off, in sync. "
"Vista requires that any interface that provides high-quality output
degrade the signal quality that passes through it. 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. In fact the spec 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.
The same deliberate degrading of playback quality applies to audio, with
the audio being downgraded to sound (from the spec) "fuzzy with less
detail"."
http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt
The Vista Content Protection specification could very well constitute the
longest suicide note in history.
"Vista's content protection mechanism only allows protected content to be
sent over interfaces that also have content-protection facilities built
in. ... Since S/PDIF doesn't provide any content protection, Vista
requires that it be disabled when playing protected content. In other
words if you've invested a pile of money into a high-end audio setup fed
from a digital output, you won't be able to use it with protected
content. Similarly, component (YPbPr) video will be disabled by Vista's
content protection, so the same applies to a high-end video setup fed from
component video."
"So the instant any audio derived from premium content appears on your
system, signal degradation and disabling of outputs will occur. What
makes this particularly entertaining is the fact that the
downgrading/disabling is dynamic, so if the premium-content signal is
intermittent or varies (for example music that fades out), various outputs
and output quality will fade in and out, or turn on and off, in sync. "
"Vista requires that any interface that provides high-quality output
degrade the signal quality that passes through it. 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. In fact the spec 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.
The same deliberate degrading of playback quality applies to audio, with
the audio being downgraded to sound (from the spec) "fuzzy with less
detail"."
