Re: HDVD - RIP

AZV14@xxxxxxxxxxxx wrote:

I do not follow your arguement,,,??

If you can not see the scan lines at 3X distance - then why would you
also be able to see the difference between an SD and an HD picture at
more than 3 X distance,,,,,?

and to get back to the original point of the post, which was not if
under a particular set of contrived conditions a sub set of people can
see the difference between SD and HD - the point was would enough
people see the difference to make HD TV a commercial success.

The answer still stands at NO,,,,just look at this forum, 90 percent
are buying/asking questions about 50 inch or smaller TVs,,,,a 60 inch
diagonal TV is HUGE,,,and isnt something most are buying....

Popular Mechanic ran exactly the tpye of comparison I am taliking
about in last months issue. They compared an $80 upsampling DVD player
to the Toshiba HD player - using a 42 inch TV, with viewers at 6 feet
and 12 feet. Conclusion was - save your money, not even the
Videophile participant could consistantly identify the HD version of
the movie.

I do not dispute if you blow up the picture big enough you can detect
a difference - can you sell that difference, answer still stand at NO.




Tom Stiller <tomstiller@xxxxxxxxxxx> wrote:

In article <44e75109.3369109@xxxxxxxxxxxxxxxxx>, AZV14@xxxxxxxxxxxx wrote:

"R Sweeney" <DockScience@xxxxxxxxx> wrote:

<AZV14@xxxxxxxxxxxx> wrote in message news:44e9752f.33905703@xxxxxxxxxxxxxxxxxxxx
If you sit back from the set more than 6 feet or so - the human eye
does not have the angular resultion to tell the difference between a
good 480i DVD and an HD one.
That is bull.
I sit back 12 feet from a 60" and can tell easily tell
HD from DVD for the same material.


Sorry but unless your ancestors cross bread with an eagle at some
point,,its not bull shit, its a fact of human anatmony.

the human eye only has so many rods and cones per square centimeter of
retina,,,that defines the angular accuity. It has nothing to do with
focus, the human eye is limited in the arc seconds it can resolve.
This is why you can not see the individual scan lines - except when
you get right up to the screen.

apparently, your SD DVD source is not very good, and your HD source is
better, or more likely your HD and SD sources have different
color/brightness balances, and you perfer the HD balance. Its the same
trap "audiophiles" run into, when one comparison source is a few DB
louder than another, they naturally think the louder source is the
better one.

Note that I said a well made,,not all DVDs are well made, nor do all
DVD players display them at there best.

12 feet is only about 5 times picture height for a 60" screen. Anything less than about 7 times picture height is enough to resolve the scan lines in a well focused SD picture. Anything over about 3 times picture height is far enough that the normal eye cannot resolve the scan lines in an HD picture. So at 12 feet, the average human eye should easily distinguish between SD and HD images.

--
Tom Stiller

PGP fingerprint = 5108 DDB2 9761 EDE5 E7E3 7BDA 71ED 6496 99C0 C7CF


That article was...
http://www.popularmechanics.com/specials/upgrade/3279591.html?page=4&c=y

And is consistent with most other studies done comparing HD to upconverted DVD on 42" TV or less.

HD is definitely about bigger than 42". If you were comparing an image captured at true 480P on a native ED 42" TV it would look better than the same image captured with 1080i on a 42" Plasma for instance. The down converted 1080i would not look as good as the native 480P.

Bob Miller
.

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