RE: Interlace Noise (field swapping?) on Pinnacle PCTV

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Hi Mike,

Hmm... Well, I'd never buy a Radio Shack 'noise injector' ;), but I do
have a high-quality RF amp kicking about that I'll hook up.

I had assumed that since xawtv displayed a good picture, my signal
strength was fine, but perhaps this isn't really so... An interesting
suggestion. Thanks, I'll let you know if it makes the difference.

Cheers,
Pat

-----Original Message-----
From: video4linux-list-admin@xxxxxxxxxx
[mailto:video4linux-list-admin@xxxxxxxxxx] On Behalf Of Mike Wood
Sent: Wednesday, February 20, 2002 9:54 AM
To: video4linux-list@xxxxxxxxxx
Subject: Re:  Interlace Noise (field swapping?) on Pinnacle PCTV


    I own the same card as you, and found that my picture quality was
pretty poor until I hooked up one those radio shack cable TV amplifiers.
The problem wasn't very pronounced in fbtv, but when I encoded
mpegs/divx's it was fairly noticeable.  Try going and picking on of
these things up, and if it doesn't solve your problem you have 15 days
or so in which to return it.


----- Original Message -----
From: <video@xxxxxxxxxxxxx>
To: <video4linux-list@xxxxxxxxxx>
Sent: Wednesday, February 20, 2002 3:43 AM
Subject: RE:  Interlace Noise (field swapping?) on Pinnacle PCTV


> Aha.  That's what I think too. :)
>
> The question I now need to answer is: If it isn't interlace noise, 
> what is it?
>
> Anyone have any ideas?  I'm going to try to grab some raw frames to 
> see what it looks like un-encoded.
>
> Regards,
> Pat
>
> -----Original Message-----
> From: video4linux-list-admin@xxxxxxxxxx 
> [mailto:video4linux-list-admin@xxxxxxxxxx] On Behalf Of Trevor Boicey
> Sent: Wednesday, February 20, 2002 12:40 AM
> To: video4linux-list@xxxxxxxxxx
> Subject: Re:  Interlace Noise (field swapping?) on Pinnacle PCTV
>
>
> video@xxxxxxxxxxxxx wrote:
> > It's a short clip, but you can clearly see these lines, even with 
> > mpeg1 encoding..  Can anyone compare this to thier results, and let 
> > me
>
> > know if this is typical?
>
>   That doesn't look like interlacing to me, it looks way too coarse.
>
>   Interlacing lines are much much finer, more or less one scan line 
> high on a 640x480 capture for NTSC...
>
>   I'll email you a picture of "typical" interlace issues.
>
> --
> Trevor Boicey, P. Eng.
> Ottawa, Canada, tboicey@xxxxxxx
> ICQ #17432933 http://www.brit.ca/~tboicey/
> "So Hungry... can't eat car..." - Homer
>
>
>
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