[opendtv] Re: New Chips Improve Color TV Dramatically
- From: "John Willkie" <johnwillkie@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 2 Jul 2004 20:04:43 +0100
Thansk for the feedback and correction, Don. I remember from my childhood
the dark, cathedral-like viewing situations for early color TVs. There
might be an angle to reintroduce the purer green phosphors, methinks, when
one considers the dark, cathedral-like viewing situations of modern
home-theater setups and the financial abilities of people interested in the
"best."
Of course, that IS a premium niche (or premium, niche) market.
John Willkie
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Don McCroskey
Sent: Friday, July 02, 2004 6:41 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: New Chips Improve Color TV Dramatically
The reason why receiver manufacturers quickly abandoned the NTSC green
phosphor was because of low screen brightness compared to the
yellow-green phosphors used since the mid-50's. The continued search
for an NTSC green phosphor with the desired light output has been
unsuccessful AFAIK. I would guess that Cliff was viewing the CT-100
in comparatively dark surroundings.
Don McCroskey
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of John Willkie
Sent: Wednesday, June 30, 2004 7:01 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: New Chips Improve Color TV Dramatically
Is it still as difficult to acquire the rare-earth green phosphors as
it once was (the reason I've always heard for using less-vivid green
phosphors?)
John Willkie
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of cliff benham
Sent: Tuesday, June 29, 2004 7:15 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: New Chips Improve Color TV Dramatically
Last summer, I saw NTSC pictures on a restored, properly adjusted
CT-100, the very first RCA color set and the only "TV Set" ever built
with an unequal bandwidth I-Q decoder and a 15GP22 CRT, the only CRT
ever to employ the original NTSC phosphors.
Next to it was a properly adjusted 12 inch (Sony Trinitron CRT)
Tektronix 650 color monitor. The source material was transferred film
and video on DVD.
The RCA had much darker, richer greens than the TEK, and produced a
subjectively more pleasing color picture than the TEK.
The RCA pictures had a very different look than the TEK and were more
preferable to me. The TEK produced yellowish greens.
If all the decoding and phosphor coordinates are so close, why did
they look so different?
Doug McDonald wrote:
>--- Alan Roberts <roberts.mugswell@xxxxxxxxxxxxxx>
>wrote:
>
>
>>Mark, we all agree that they are near identical.
>>
>>
>
>
>I do not agree. The blues are near identical.
>
>The reds are very close.
>
>The greens except the original NTSC (and Adobe RGB) green are very
>close. The original NTSC is wildly different from all the others
>(except Adobe RBG), and is wildly inferior. The NTSC green is green,
>the other are a rather sickly yellow green.
>
>And my eye is pretty well calibrated from decades of staring at pure,
>monochromatic, at the edge of the CIE diagram, lasers. I can tell
with
>10 nm the wavelength of any color, and within 3 nm for the 555-620
nm,
>just by looking. This gives some idea of what a trained person can do
>at the edge of the chart. Inside, while I can do pretty well at the
>dominant wavelength, I have no good ability to tell saturation ...
>especially in the blue-green.
>
>Doug McDonald
>
>
>=====
>Doug McDonald
>my last name at scs dot uiuc dot edu, not here at Yahoo, please
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts:
