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Author Topic: DCTV Question for Amiga 2000  (Read 9232 times)

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Offline Fingers

Re: DCTV Question for Amiga 2000
« Reply #44 from previous page: April 29, 2014, 07:46:07 AM »
Quote from: amigadave;328123
I once saw at an Amiga Show an stock 030 A3000 w/DCTV running the complete Back to the Future movie in DCTV format from the hard drive, smoothly and at full speed with no skipped frames.


I have a DCTV & had absolutely NO IDEA it could do such things! :O

Here I was thinking it just captures images...please more info on this...please?

PZ.
 

Offline psxphill

Re: DCTV Question for Amiga 2000
« Reply #45 on: April 29, 2014, 09:20:33 AM »
Quote from: desiv;763359
That being said tho, the Wii composite output looks decent on composite (I've moved to component, but the composite isn't hideous...)

The Wii is mostly simple cartoon graphics, but I would say it is pretty bad. Component is far superior, except it shows just how blocky the graphics are.
 
Quote from: Sean Cunningham;763246
S-Video isn't necessarily better than standard Composite video when connecting two devices. It depends on which device has the better comb filter. The signal is exactly the same before chroma and luma are split.

S-video was created purely to skip the step of combining and separating.
 
I can't think of any reason why you'd have something that would generate the chroma and luma. combine them to composite and then stick them through a filter to extract the chroma and luma. If you get a better picture using composite than using svideo, then either your equipment sounds broken or your definition of better is different to everyone else's.
 
Of course if your equipment can really only output composite, then you have the choice of letting your TV split the signal or put in a box that splits it and feeds it to the TV. But it's possible the DCTV does have points on the board you can tap the pre mixed chroma and luma.
« Last Edit: April 29, 2014, 09:25:08 AM by psxphill »
 

Offline Sean Cunningham

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Re: DCTV Question for Amiga 2000
« Reply #46 on: April 29, 2014, 03:26:23 PM »
Welcome to video?

S-VHS, Laserdisc, etc. these S-Video capable formats didn't actually store to media the video as anything but composite.  Then either your player or your set comb filtered the signal and the quality of the filter at either end determined whether or not it was advisable to do it in the player or in the set.

It wasn't a function of whether the equipment could only output composite or S-Video (which is still composite video, since chroma is not separated into its component form) this is how the base signal being displayed is recorded and generated.  It's always composite and sometimes a mildly better composite.  

Whether there is a more opportune place to tap into the process when an RGB source is being converted to composite video would depend on the components used and whether or not existing RGB->Y/C in fact created discrete streams of Y and C or did a single stream conversion and then offered a second path through a comb filter.  In the case of DCTV this is a big "if" because its whole success is based on a hack of the composite signal affecting both streams.  Ultimately the tweak to composite only slightly increases luminance resolution since chroma stays abysmally low until you're working true component video in the style of BetaCAM and better.
« Last Edit: April 29, 2014, 03:31:38 PM by Sean Cunningham »
 

Offline desiv

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Re: DCTV Question for Amiga 2000
« Reply #47 on: April 29, 2014, 11:44:44 PM »
And, quick rant..
Why didn't Digital Creations support DCTV with Brilliance!!!!!

It's their software and their hardware!!!

Oh well, DCTV Paint is pretty good..

desiv
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Offline magnetic

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Re: DCTV Question for Amiga 2000
« Reply #48 on: April 30, 2014, 02:14:21 AM »
Quote from: amigadave;328123


I thought there was one game that came out in DCTV format, but can't think of the name.  Maybe I am confusing it with the 24bit game that came with the OpalVision card?


yes dave you are thinking of the Karate game that came with Opalvision. DCTV never came with a game afaik.
I used to use DCTV with an a2000 for outputting Vista Pro Animations in DCTV format super fast and lest OCS/ECS amigas have 18 bit color output.
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