[opendtv] Re: Analysis: Should Apple Buy Hollywood?

  • From: Craig Birkmaier <craig@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Fri, 2 Mar 2012 09:46:52 -0500

At 2:24 PM -0800 3/1/12, dan.grimes@xxxxxxxx wrote:
Craig wrote:

"MPEG-2 MP@ML specifies 4:2:0 sampling which tends to limit the accuracy of the color samples when there is rapid motion."

But not just in rapid motion. One can see major color problems in still motion video and is particularly prevalent in graphics, especially those with brighter/saturated colors (less luminance relationship) and with rounded edges. Color is quite blocky. Going to 4:2:2 is a major improvement over 4:2:0, in my opinion.

Dan

Yup. But your not going to see that in the big distribution pipes. What you are seeing is the move to progressive scanning at all resolutions, in which case 4:2:0 works just as well as 4:2:2 for interlaced sources.

The problem is not MPEG, the problem is iNtErLaCe.

Regards
Craig


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