Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!usc!celia!neil From: neil@celia.UUCP (Neil Richmond) Newsgroups: comp.sys.amiga.graphics Subject: Re: DCTV Message-ID: <935@celia.UUCP> Date: 11 Mar 91 19:28:13 GMT References: Reply-To: celia!neil@usc.edu (Neil Richmond) Organization: Rhythm & Hues, Inc., Hollywood Lines: 23 In article tbissett@nstar.rn.com (Travis Bissett) writes: >I saw DCTV recently at a user group meeting. IMHO, the output was clear and >no color banding was evident -- without having a side-by-side comparison or >a video technician's eye for such differences I'd guess that it stood up >very well in output against a Targa board. And, when oyu especially consider If you want a good test for color banding. Try something like interpolating a dark blue to a darker blue or a dark red to a darker red or a light green to a slightly darker green. Got the idea? With NTSC you will always get banding when you interpolate shades that are close in hue and value. Why? Because NTSC is not very good a resolving small changes, because NTSC color is a kludge. As long as there is a wide range of values, you will get a good picture. This goes for whatever output device you use ie DCTV, Targa, Video Toaster etc. If you want good looking color use RGB. You can always run the signal through an encoder to get NTSC. This is a bit more expensive than composite output, but it has more flexibility. neil -- Only 3218 shopping days left till the next millenium! Neil F. Richmond INTERNET: celia!neil@usc.edu Rhythm & Hues Inc. UUCP: ...{ames,hplabs}!lll-tis!celia!neil)