NTSC Pennant?
 

Does anyone have a nice high-res version of the NTSC pennant? This is a small version of an image that I scanned from an old TV book. There are problems with colors bleeding through from the other side of the page, etc. I have seen the little image at Ed Reitan's website, but that's not what I'm looking for as a screen background.

Phil Nelson

The only other place I've seen this is on the cover of the Jan 54 IRE Proceedings, and every copy I know of has been loved to death - in much worse condition than what you have. Sorry I can't help - good luck.

I wonder if it was ever meant to be used as a televised image. May just have been a print illustration. I suppose one could photoshop the correct hues and make a DVD, but what would be a correct/proper orange?

how's this?

Test image: note +/- I bars and +/- Q bars in upper left (Y, I, Q all full bandwidth)
http://farm3.static.flickr.com/2465/...3ea58e0d_o.jpg

Q turned off (transmitter side, I filtered at to 1.5 Mhz bandwidth):
http://farm3.static.flickr.com/2650/...fe8101cf_o.jpg

I turned off (transmitter side, Q filtered to 0.5 Mhz bandwidth):
http://farm3.static.flickr.com/2774/...36c43d42_o.jpg

Encoded and decoded with I/Q demods, subcarrier notch filter in Y channel, shows: cross color in awning; Q smear on green-magenta edge; subcarrier dots on color bar edges.
http://farm3.static.flickr.com/2704/...d925c47b_o.jpg

NOTE: computer simulation was simplified by making the color subcarrier phase coherent with the pixel placement in these images, resulting in the slight aspect ratio distortion seen here.

Interesting! John

That seems likely. The plate in this book just reproduces the IRE illustration, which certainly isn't in TV format.

I think I have seen a recommendation from you for this book, in fact -- Basic Television by Bernard Grob.

I have been using this as a computer desktop background and thought someone might happen to have a better version. The scan I made looks kinda fuzzed when blown up to 1440 x 900 resolution. Still jolly, though.

Phil

Oops! (slaps forehead w/left hand) I shoulda knowed!
:bash:

+I = orange

Cool! I had not noticed cross color in the awning before your pointing it out. Neat simulation.

Pete

The printers must still have been setting up the press when they printed my color plate as it is not as good as the image you posted. Your color is more accurate -- especially yellow -- and so is your registration. Like to get my hands on the original color separations. It'd be like Chuck Pharis acquiring the original RCA Indian Head artwork.

Pete

Here's an enlarged (and slightly color-corrected) version of the original image that was posted above... it could still be sharpened a bit, if that's your preference.

The size is now 1024 x 599.

Hope this is useful...

-Kevin

Cool. How did you do color correction? I'm a dolt when it comes to using Paintshop. I have the original scan (820K !) at http://antiqueradio.org/art/temp/NTSCBackground.jpg .

Phil

Wow-- thanks for supplying the original scan, Phil!

I've similarly color corrected the original (as well as did a quick bit of clean-up to even out the lighter blue on the right, and get rid of a few dark spots and image flaws), and reduced it to the same 1024 x 599 size. The reduction route gives much nicer results than blowing up a small image, since the final picture retains a lot of the texture of the original, which my blow-up wouldn't have had, even if it were sharpened.

Looks decent enough, I'd say... :)

-Kevin

That's much better. It's already on my desktop. Thanks!

Phil

Did a little photoshopping http://www.videokarma.org/attachment...6&d=1256797967

And the digital version as well :D http://www.videokarma.org/attachment...5&d=1256797967

http://farm3.static.flickr.com/2465/...3ea58e0d_o.jpg

It seems, based on the colors as registered in this JPEG file, that 205° would be the RGB position for -I, 24° for +I, 275° for +Q and 95° for -Q, would that sound correct? (Being that RGB values are different from the phase positions in video language.) I had done my own research of position values in Photoshop and Corel Photo-Paint 11, and had come up with:
- 204° for -I
- 24° for +I
- 272° for +Q
- 92° for -Q