From ns.itep.ru!Radio-MSU.net!alpha.phys.msu.su!news.rssi.ru!news.mtholyoke.edu!uhog.mit.edu!nntp.club.cc.cmu.edu!miner.usbm.gov!news.er.usgs.gov!stc06.ctd.ornl.gov!fnnews.fnal.gov!uwm.edu!chi-news.cic.net!nntp.coast.net!col.hp.com!fc.hp.com!myers Wed Dec 20 11:47:54 1995 Path: ns.itep.ru!Radio-MSU.net!alpha.phys.msu.su!news.rssi.ru!news.mtholyoke.edu!uhog.mit.edu!nntp.club.cc.cmu.edu!miner.usbm.gov!news.er.usgs.gov!stc06.ctd.ornl.gov!fnnews.fnal.gov!uwm.edu!chi-news.cic.net!nntp.coast.net!col.hp.com!fc.hp.com!myers From: myers@fc.hp.com (Bob Myers) Newsgroups: comp.sys.ibm.pc.hardware.video,sci.engr.television.advanced,rec.video.desktop,comp.os.ms-windows.win95.misc Subject: Re: Can I substitute a 27" TV for my puny monitor? Followup-To: comp.sys.ibm.pc.hardware.video,sci.engr.television.advanced,rec.video.desktop,comp.os.ms-windows.win95.misc Date: 19 Dec 1995 15:52:15 GMT Organization: Hewlett-Packard Fort Collins Site Lines: 34 Message-ID: <4b6n3f$psf@fcnews.fc.hp.com> References: <48l2to$a99@ixnews2.ix.netcom.com> <493g4d$nma@odo.PEAK.ORG> <495qct$4m9@guysmiley.blarg.net> <4a7c0m$ava@news.vanderbilt.edu> <4a9v5l$j86@fcnews.fc.hp.com> <4b4btg$8aq@alecto.METC.DOE.GOV> <4b4q0r$7kd@fcnews.fc.hp.com> <4b4u9t$hf5@news.voicenet.com> NNTP-Posting-Host: hpfcrlm.fc.hp.com X-Newsreader: TIN [version 1.2 PL1.4] Xref: ns.itep.ru comp.sys.ibm.pc.hardware.video:52987 sci.engr.television.advanced:1287 rec.video.desktop:893 comp.os.ms-windows.win95.misc:73849 Artem Koutchine (artem@omni.voicenet.com) wrote: > NTSC (american broadcasting) about TTTTx400 (xxxx mean i do not remember how > many thousands) > PAL/SECAM: YYYYx600 (YYYY>TTTT) > but still, not enough even for 640x480 :((( vertical resolution on TVs sucks These are the BROADCAST formats, not what the display actually resolves. (And really, the only thing meaningful in these is the number of lines per field or frame; analog broadcast standards know nothing about the notion of the number of pixels per line.) The actual numbers for both formats are 525 lines/frame total for NTSC (including vertical blanking) and 625 lines/frame for PAL/SECAM. The "active" image area is closer to 480-484 lines/frame for NTSC, and around 570-590 for PAL/SECAM. "Digital" versions of these are usually taken to be 640 x 480 for NTSC (which is where the VGA format came from originally) and 768 x 576 for PAL/SECAM. However, the receiver doesn't actually resolve this many pixels or lines in either direction; the bandwidth of the system is too low for 640 pixels horizontally, and the effects of interlacing (and other factors, summed up in the Kell factor) drop the effective resolution vertically. As I said, the best you can hope for in delivered, effective resolution in the broadcast NTSC case is around 400 x 300. (And THAT may seem generous in some people's opinions!) Bob Myers | myers@fc.hp.com Senior Engineer, Displays & Human Interface | Note: The opinions presented Workstation Systems Division | here are not those of my employer Hewlett-Packard Co., Ft. Collins, CO | or of any rational person.