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- Xref: sparky comp.compression:2852 rec.video:9706 rec.video.satellite:3839 rec.video.production:1184
- Path: sparky!uunet!ogicse!uwm.edu!rutgers!uwvax!astroatc!vidiot!brown
- From: brown@vidiot.UUCP (Vidiot)
- Newsgroups: comp.compression,rec.video,rec.video.satellite,rec.video.production
- Subject: Re: Compression artifacts in NBC Olympic coverage
- Message-ID: <3717@vidiot.UUCP>
- Date: 28 Jul 92 18:02:55 GMT
- Article-I.D.: vidiot.3717
- References: <MONTA.92Jul26181344@image.mit.edu> <1992Jul27.162002.21503@unixland.natick.ma.us> <1992Jul27.201440.7121@cs.tu-berlin.de>
- Reply-To: brown@vidiot.UUCP (Vidiot)
- Organization: Vidiot's Hangout
- Lines: 40
-
- In article <1992Jul27.201440.7121@cs.tu-berlin.de> harry@cs.tu-berlin.de (Harald Brinkmann) writes:
- <Hi There!
- <
- <Well, I haven't seen those artifacts that you lot in the US rave
- <about. Anyway here some some thoughts of mine about that:
- <
- <They could be standard conversion atrifacts, but I'm surprised that
- <no-one has ever noticed them elsewhere. I have heard that they use at
- <least for slow motion (I'm not sure about standard conversion) a new
- <system with motion estimation, which is intended to make movements
- <more smooth. Fast movements on existing standard converters looks
- <really messy. (For those of you who can pick up PAL signals look for
- <Spacenet S2 at 69 deg 3920 MHz Vertical which is supposed to be
- <ECO/Galavision for Europe already PAL transcoded. Look for for moving
- <letters like scrolling subtitles or credits.)
-
- Thanks for your input. I greatly helps my point. The problem has been seen
- previously, during the Winter Olympics, where these new standards converters
- were first brought on line. They are the same ones, since NBC loaned them
- to CBS.
-
- While these new converters really help motion, they sure introduce other
- problems.
-
- <American TV programmers often insist on using their own cameras in
- <international events. They may relay the international feed and mix it
- <with their own output. Often their own cameras are in NTSC, so there
- <would be no stanard conversion then. Indoors with 50 Hz lighting this
- <may be impractical though, but I have seen that during the Winter
- <Olympics for Outside broadcasts.
-
- In this case, there is no NTSC cameras there. Apparently to make life easier
- for NBC, all of the equipment they are using is PAL. See previous article
- regarding this. I agree that this has been the case most of the time in the
- past.
- --
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