[opendtv] Re: Optimizing the system
- From: JohnWillkie@xxxxxxxxxx
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 20 Dec 2004 13:15:28 -0800 (PST)
More succinctly, the only 24 fps formats are progressively scanned.
John Willkie
> Tom,
>
> Believe it. You can see this phenomenon all the time on any of the
> Standard
> Definition digitally delivered programming services such as DirecTV, Dish
> Network, or digital cable where they squeeze the programming into 1 Mbps
> or
> less. Heads are constantly surrounded by (and this is a semi-official
> description of the effect) clouds of bees that simply aren't there in
> uncompressed digital video. For a repeatable and reliable demonstration
> of
> this effect, look at the ticker crawl at the bottom of the screen on MSNBC
> on DirecTV.
>
> As for the Blu-Ray DVD, I don't know if 1080p24 is a display resolution in
> WM9 or AVC. I do know that it does not exist in the infamous ATSC Table 3
> of formats. That table tops out at 1080i30
>
> John Shutt
>
> ----- Original Message -----
> From: "Tom Barry" <trbarry@xxxxxxxxxxx>
>
>
>> Sorry, I do not believe it is just compression artifacts though I admit
>> the possibility. And all my comments about 1080p have been prefaced
>> with the qualification that sufficient (not equal) bit rate was
>> available.
>>
>> At any bit rate and codec there is probably a sweet spot resolution.
>> But my hope for 1080p was based upon blue laser DVD with maybe 30 GB on
>> a blu ray or dual layer HD-DVD, using WM9 or AVC. That should be enough
>> for 1080p and I really hope they use it.
>>
>> - Tom
>
>
>
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