[opendtv] Re: Math of oversampling
- From: Bob Miller <bob@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 25 Apr 2005 20:47:46 -0400
Don Munsil wrote:
>From: "Doug McDonald" <mcdonald@xxxxxxxxxxxx>
>
>
>>It depends on the source material. Theatrical films are very poor source
>>material for telling HDTV from SDTV (DVD is SDTV). Nevertheless it is
>>very very easy to tell the difference on a good HD, even at 40 inches,
>>which is what I own.
>>
>>
>
>Very very easy for you and I and others on this list, sure. For the general
>public? I have severe doubts.
>
>
>
>>That's not to say that really really good 480p, originally
>>made with true HD or 480p TV cameras is not quite good ... as was shown
>>by Fox before they went true HDTV.
>>
>>
>
>So we agree. :-)
>
>
>
>>The true test is not movies ... it is sports shot live on 720p or 1080i,
>>Leno, or the better ABC HDTV sitcoms.
>>
>>
>
>Agreed. However, I've made the comparison of the same sports material at
>720p and 480p (using the downsampling capabilities of my HD-Tivo), and other
>sports at 1080i converted to 480p, and while I thought the differences were
>significant (and how could they not be?), "real" 480p still looked
>surprisingly good, and certainly much improved over deinterlaced 480i.
>
>If I can find the time, I'll do some tests here with 720p compared to
>720p->480p->720p. Obviously it'll look worse, but I think many will be
>surprised at how good 480p can look. If I can find a clip or still I can put
>on the net, I'll stick the comparison somewhere folks can see it.
>
>Don
>
>
This discussion is turning out real well. Glad I started it. Which I
could participate.
Bob Miller
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