Path: utzoo!dciem!dretor!client1!king
From: king@client1.DRETOR.UUCP (Stephen King)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Message from designer of FlickerFixer
Message-ID: <940@client1.DRETOR.UUCP>
Date: 23 Aug 88 12:39:19 GMT
Article-I.D.: client1.940
References: <3328@crash.cts.com> <5662@utah-cs.UUCP> <128@antares.UUCP>
Reply-To: king@client1.UUCP (Stephen King)
Organization: D.C.I.E.M., Toronto, Canada
Lines: 21

In article <128@antares.UUCP> jms@antares.UUCP (joe smith) writes:
>Does this mean that when the networks are providing a live feed and the
>TV camera is panning horizontally across a scene with a lot of vertial
>lines, we will see pictures updated at only 30 Hz?  I was under the
>impression that the camera does no buffering; if the image changes 
>it will output consecutive frames that do not match, just like the Amiga.
>
>Is this correct?
>
If the studio is using a conventional TV camera, then the vertical lines
may appear to be jagged, depending on the speed with which the cameraperson
pans the camera. Each successive field will show the verticals as being
slightly displaced horizontally due to the camera motion. FlickerFixer
cannot fix this. Complete frames occur at a 30Hz rate. Fields are 60Hz.
Interlace causes the problem. Shuttered cameras have been developed wherein
the image sensor is exposed briefly and a frame is stored until both fields
have been transmitted. I don't know (exactly) how they work, but they will
alleviate this annoying problem. Does this answer any questions?
-- 
***** DCIEM Simulation & Training Group *********** Stephen J King **********
- is not responsible for this message.	     {utzoo|mnetor}!dciem!dretor!king