Hmmm, I got this today:
Sorry it took so long to get back to you. We have very recently received a couple of more complaints of this nature - smearing or ghosting with fast motion. This feed comes directly to us from PBS,
and the best we can tell is that they may be having problems with shows that were not originally filmed in HD. They "upconvert" these shows, and it appears that the upconversion process may have
some issues with fast motion. To be honest, we really haven't seen the problem here so we have to assume that it is only on occasional shows.
We haven't changed our subchannel lineup or bandwidth parameters in over a year, and this appears to be a recent problem, so I don't think this is an issue. FYI, we use a system that dynamically
allocates bandwidth to whichever channel(s) need it most at any given time, with the HD channel as a priority, so this shouldn't be a problem for all but the most demanding video.
We'll keep an eye on this and if we can catch it in the act we'll be able to determine if it's coming from the source.
Best regards and thanks for viewing!
Director of Engineering and Technology
Western New York Public Broadcasting Association
simplicity is genius...