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- Path: news.internetMCI.com!news-admin
- From: David Gentry <dgentry@vlsi4.racal.com>
- Newsgroups: comp.sys.amiga.multimedia,comp.sys.amiga.misc,comp.sys.amiga.graphics,comp.sys.amiga.hardware
- Subject: Re: Amiga NTSC Line Doubling
- Date: 30 Jan 1996 21:31:51 GMT
- Organization: Racal-Datacom
- Message-ID: <4em2o7$2os@news.internetmci.com>
- References: <4e5kkg$b6j@news.microsoft.com> <1115.6598T1401T905@mbox3.swipnet.se>
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- roland.bengtsson@mbox3.swipnet.se (Roland Bengtsson) wrote:
- >
- > >:Somebody had mentioned to me that the Amiga (the 3000 to be specific) had
- > >:the capabilites to do NTSC and PAL line doubling.
- >
- > >:As a none Amiga user, I'm curious if this is true, and if so has anybody
- > >:applied this to a home-theater setup? It seems like this would be a
- > >:terrific alternative to the Faroudja Line-Doubler which can cost well over
- > >:$10K.
- >
- >I don't know what this "Faroudja" is, but I have a A3000 and it simply double the PAL
- >signal 15 KHZ to VGA 30 KHZ so I can use a standard VGA-monitor for PC to watch PAL & NTSC
- >screens. It's a great trick indeed, and it's the only Amiga that handle this by default.
- >
-
- Actually, this mode promotion comes with AGA machines.
-
- Anyway, I don't think the Amiga, or a high-power Pentium PC, for that matter could
- match the performance of a Faroudja Line-Doubler. First of all, you have to have the
- ability to input the video stream in real-time and the ability to redisplay it in
- real-time. There are plenty of PC options, but very, very few options for the Amiga.
-
- On top of this, the would-be Line-Doubler would have to be able to intercept both the
- even and odd scan lines, by predicting the change between frames for each field for
- every frame, convert it to 30kHz, and redisplay both even and odd field scan lines as
- a composite image. The prediction part is what separates the Faroudja between lesser
- line-doublers.
-
- This is a very tall order for any machine. Think of the bandwidth and processing
- power needed. It would be quite a lucrative market if this were possible, since many
- line-doublers are >$5000 easily and when you have a 8 foot screen in a home theater
- that shows those glaring scan lines. But I believe Faroudja line-quadrupler was just
- released...
-
- D. G.
-
-