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From: grr@cbmvax.cbm.UUCP (George Robbins)
Newsgroups: comp.sys.amiga
Subject: Re: Future Amiga Video
Message-ID: <1814@cbmvax.cbmvax.cbm.UUCP>
Date: Thu, 30-Apr-87 22:44:59 EDT
Article-I.D.: cbmvax.1814
Posted: Thu Apr 30 22:44:59 1987
Date-Received: Tue, 5-May-87 04:39:19 EDT
References: <10726@topaz.RUTGERS.EDU> <1964@hoptoad.uucp>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 41

In article <144UD118191@NDSUVM1> UD118191@NDSUVM1.BITNET writes:
>Kim mentions the possibility of doing Chroma Keying with a special device in
>the future that would possibly fit into the specialized video slot of the
>Amiga 2000. Ok...I ask you this much: What is your definition of Chroma Key?
>I use the chroma key at a TV studio everyday, and it is part of the Master
>Control in the TV control room. What good is having a chroma key without a
>TV studio? I can't see any use of having a "Chroma Key Card" unless a person
>wanted to stand in front of a green curtain (like I do when doing TV weather)
>and have him/herself "superimposed" over the Amiga image.

	Don't you think we want to see our images floating over a graphics
	background also?  Professional toys have little to do with desire.

>                                                          This would be very
>difficult to do, and think of the cost of such a device. If it were to be a
>professional chroma key, Commodore would have to do a better job at making
>this great chroma key card than they did the Amiga Genlock.

	Actually, since I found out what chroma-keying was about, I've thought
	it is something that should be part of the Genlock peripheral.  Once
	you've done the RGB separation, the actual chroma-keying shouldn't be
	difficult, just three video-speed comparators and a touch of logic.
	Might cost five dollars or so.

>                                                              I've never
>laughed harder than the day when we connected an Amiga Genlock to our Master
>Control and it didn't work! Genlock...HA HA HA! And now a Chroma KEY? Oh, do
>we all have a TV studio in our back yard? Think of the extreme vertical
>market!

	Well?  How did it fail and were you able to get it to work?  My
	understanding is that for real broadcast quality output, you need
	to run the RGB video into the studio bus and the SYNC through
	some kind of sync regenerator.  Was it worse than this?

	BTW, how many A1000's and Genlock's can you buy for the price of
	a typical studio titler or other typical piece of equipment?
-- 
George Robbins - now working for,	uucp: {ihnp4|seismo|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@seismo.css.GOV
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)