[opendtv] Re: 1080p @ 60 is Next?

  • From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Thu, 17 May 2007 14:01:34 -0400

Dan Grimes wrote:

> Call me nuts and unscientific, but when I compare 1080i
> and 720p original source material from a camera of a
> static scene on two monitors side by side, I prefer the
> 1080i at almost any distance for various reasons
> including perceived sharpness.
>
> When I compare 1080i source material off of a HDCam tape
> and a 720p source off a DVCProHD, I can tell the
> difference across the studio floor.  The 1080i wins
> hands down, but not necessarily based on resolution.
> Color (and especially color resolution) has a lot to do
> with it.

I don't find that unscientific at all. I figure, you are noticing that
the 1080i has greater chrominance and luminance bandwidth than 720p.

> But, when I compare 1080i material and 720p material
> from transmitted sources (OTA, DBS, Cable, etc.), the
> 720p format wins everytime at any distance, independent
> of the screen resolution (that is 720 or higher) and
> especially if motion is involved.

The interesting test would be to see whether a 25 or 30 Mb/s channel
changes that result for 1080i transmission.

Bert
 
 
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