Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!usenet.ins.cwru.edu!gatech!taco!hobbes.catt.ncsu.edu!kdarling From: kdarling@hobbes.catt.ncsu.edu (Kevin Darling) Newsgroups: comp.sys.amiga.advocacy Subject: Re: CDTV News Message-ID: <1991Jun15.064926.27796@ncsu.edu> Date: 15 Jun 91 06:49:26 GMT References: <1991Jun12.205030.4401@news.iastate.edu> <1991Jun14.125339.18489@NCoast.ORG> <1991Jun14.214105.1414@ncsu.edu> <1991Jun15.025015.13046@mintaka.lcs.mit.edu> Sender: news@ncsu.edu (USENET News System) Organization: North Carolina State University Lines: 31 In article <1991Jun15.025015.13046@mintaka.lcs.mit.edu>, Ray writes: >>[ stock CDTV is ] bad enough for color and fleshtones, but also consider >>B&W photographs... and then think about the limited greyscale of stock CDTV. > >Well, if CDTV is "inadequate" for fleshtones and B&W, so is CD-I. Bogus conclusion. In many cases, 64 grey levels are considered sufficient (and necessary). CD-I has 256 shades of grey available per pixel, but CDTV has only 16. What we have to wait and see, is if it's true that CBM plans to make a DCTV adapter available to Photo-CD customers. >> "The Photo CDs will also produce high quality photographic display >> on Philips' new Compact Disc Interactive (CD-I) players." > >Assuming CD-I gets a revised chipset. NTSC can hardly be considered >"high quality" when compared to 24-bit megapixel. By the time CD-I >and Kodak's system hits the market CDTV could already have the DCTV >set which lets you rival CD-I's image quality. True, obviously NTSC can't show all the Photo-CD pixels. But then, you'd need a workstation to do that, wouldn't you? The majority of people will be viewing them on their home TV, for which CD-I is ideal. Kodak's idea is that players will zoom and pan around the image. And don't compare DCTV to CD-I's DYUV. They are not the same at all. DCTV has only a quarter of the color range, only half the horizontal color resolution, and only half the vertical luminance resolution. Not to mention that the higher res chipset planes used for DCTV would further slow down the CDTV cpu, something DYUV does not do on CD-I. - kevin