Re: Apple GPUs now 2 generations out of date?

In article <0_idnVD7ds17kXLanZ2dnUVZ_sudnZ2d@xxxxxxxxxxx>,
"Hasta La Vista" <noemail@xxxxxxxxx> wrote:

"Alan Baker" <alangbaker@xxxxxxxxx> wrote in message
news:alangbaker-BCB586.20175929032008@[74.223.185.199.nw.nuvox.net]...
In article <jc-dnQsnKp58n3LanZ2dnUVZ_oaonZ2d@xxxxxxxxxxx>,
"Hasta La Vista" <noemail@xxxxxxxxx> wrote:

"Timberwoof" <timberwoof.spam@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:timberwoof.spam-61663F.19384129032008@xxxxxxxxxxxxxxxxxxxxxxxxxxx
In article <Nc6dnTtpy-u2aHPanZ2dnUVZ_g6dnZ2d@xxxxxxxxxxx>,
"Hasta La Vista" <noemail@xxxxxxxxx> wrote:

"Timberwoof" <timberwoof.spam@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:timberwoof.spam-237C4F.17233129032008@xxxxxxxxxxxxxxxxxxxxxxxxxxx
In article <lSzHj.27644$r76.6048@xxxxxxxxxxxxxxxxxxxxxx>,
Tim Murray <no-spam@xxxxxxxxxxxx> wrote:

On Sat, 29 Mar 2008 00:02:43 -0400, Steve de Mena wrote:
Visually you can stand across the room and tell that the cheaper
card
is more washed out and doesn't have as much "punch" as the ATI
card.

I stealing a line from Alan, and coughing out a bull***.

A digital value for a certain color is the same across video cards.
Generally
I see you as pretty technical, so I don't think you'd say that
without
reason. If you can enlighten me as to how that's possible, then I'm
all
ears.

In any video system, even a digital-input monitor, there's an
amplifier
at the end of the signal path that has to provide a specific voltage
or
current level for the pixel element. If it's calibrated wrong (with
the
wrong gain or bias levels) then the image will look bad.

However, analog video signals are standardized so that 0.0 V is
black
and 1.0 V is white. It's not rocket science to calibrate an AD
converter
to provide that voltage range for the full input range. There's more
variation between different types of monitors than between video
cards.

The only way I'd accept that diagnosis is with two identical
monitors
from the same production run, connected with an ABX switch, to the
video
sources in question.

You described an analog input. Digital inputs aren't levels of
current
or
voltage to brightness level, i.e. they're not analogs of brightness of
the
scene. The brightness of each pixel in a digital system are
expressed
by a
binary number, not a current or voltage level.

That's true at the graphics card's connector, yes. But you missed where
I wrotre,

I don't think I missed it.

In any video system, even a digital-input monitor, there's an
amplifier
at the end of the signal path that has to provide a specific voltage
or
current level for the pixel element.

The final feed to a pixel is analog, not digital. So the same problems
apply.

No, the final feed is not analog. Of the three color elements that make
up
a pixel, each receives a discrete level, defined by a number. Analog
feeds
to the pixel can vary any level between minimum and maximum, there's no
fixed steps of graduation.

By your own definition, the final feed *is* analog.

Not by my defintion, Gimp.

You defined "digital" in this context binary numbers and "not a current
or a voltage level".

I defined digital as levels in discrete steps, and analog as a continuously
variable level that can be value between minimum and maximum.

Your definition is wrong.

The fact that each binary number corresponds to a discrete voltage level
doesn't change the fact that it *is* a voltage level.

But it does make it digital instead of analog.

No, it doesn't.

You can define a tail to be a leg, but a dog will still have four legs.

All a DVI system does is move where the change from binary
representation to discrete voltage takes place. In a VGA system, the
video card converts a pixels binary representation into discrete
voltages which get put onto the output pins. From there they got to the
monitor which converts the VGA standard levels to those actually
necessary to drive its LCD pixel elements. In a DVI system, the binary
representation of the pixels colours is what gets transmitted down the
wire and the monitor converts those binary numbers into discrete
voltages.

You clearly don't understand what you're talking about, Gimp.

IOW, you don't understand what he's talking about.

--
Timberwoof <me at timberwoof dot com> http://www.timberwoof.com
"When you post sewage, don't blame others for
emptying chamber pots in your direction." ?Chris L.
.

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