[opendtv] Re: Why Europe should choose 720P for HDTV
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 12 Dec 2004 11:52:32 -0600
Craig Birkmaier wrote:
> I would also like to point out that some of the loss of resolution
> that Doug is seeing in motion with 720p is another form of artefact
> that John did not discuss in his analysis. That is, he is seeing
> MPEG-2 compression artefacts, because the ATSC channel and/or other
> downstream MPEG-2 concatenation errors are removing detail from the
> images.
Uh, no on that last one. I am seeing blurring that occurs inside
the camera. For example, a white line marker in football retains
sharp edges with a horizontal pan, and everything else shows
the same blurring. Also ... the blurred frames should be
much easier to compress since the originals lack
much detail at high horizontal frequencies.
The killer argument is that the same blurring is seen
on the analog show, which never had MPEG-2 done to it.
Doug McDonald
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