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RCinFLA said:
I notice there are no transmissions of 1080p (progressive scan), only 1080i.

Is a TV that does 1080p doing the scan sequence on its own frame buffer, meaning there is no difference in the transmitted information content, only the ways the TV presents it?

My understanding (or not) is there can be some motion shift (feathering, combing, line twitter, flicker) in the two interlaced scans and the progressive scan avoids this by presenting a frame as a film projector does. This would seem to need some interpolation smarts in the receiver and a faster scan rate to turn an "i" into a "p" scan sequence.
If your tv deinterlaces the signal correctly there should be no difference in the picture you receive whether getting the signal in 1080i or 1080p.

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