[opendtv] Re: New Chips Improve Color TV Dramatically
- From: cliff benham <cbenham@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 29 Jun 2004 22:14:46 -0400
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
>
>
>
>
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