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Join Date: Jul 2000
Location: Florida and West Virginia, USA
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It appears a couple of comments are due in response to a few of the recent postings in this thread. First I use a HDTV STB for HD and to output Std. Def. Directv and Over the Air scaled to 1080i (or 720p) to drive my Sony G70 projector (relatively high end). I also use a HTPC for scaled DVD playback. Therefore I only need a scaler for viewing the output of my SVHS VCRs, LD player and as an alternative to my Panasonic STB for outputting over the air channels. Basically any scaler output, regardless of price, looks pretty bad given the relatively poor quality of the NTSC VCR or OTA analog sources as compared to DVD via the HTPC or HDTV via the STB. I have found that even the Viewsonic VB50 ($99 street price) is better than DScaler on the HTPC (i.e., far more capable of handling rapid motion than DScaler), better than the iScan doubler and subjectively equal to my far more expensive Dwin doubler from a few years ago. Therefore in discussing the Viewsonic Nextvision products it come down to spending less than $400 to get rid of the scanning lines, but perhaps accepting a few digital artifacts vs. spending thousands of dollars to scale a soon to be obsolete analog NTSC based source to provide perhaps 5% to 10% better image than the new generation low cost scalers. I have also used the iScan doublers and found them to be totally unacceptable for analog sources because they overload and clip at slightly less then the 0.7 volts ( the standard video voltage level for composite or S-Video) I also noted that analog sources including my Sony and JVC SVHS VCRs and my Sony LD player all produce output peak levels more like 0.75v and the iScan doubler I tested began clipping just below 0.7 volts. The iScan doublers work OK with most DVD players however since most do not induce clipping with the iScan. Also any doubler will not significally reduce the visible scanning lines when use with a high quality projector such as the G70, where you really need a scaler with at least a 720p output.
As for the $200 vs. $400 for the NextVision 6, it appears that between the time of the May 2002 press release and the unit's introduction Viewsonic decided to double the price. I would expect some on-line dealers, such as buy.com to discount the NV6 to about $300.
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