Originally Posted by DTV_Engineer
You have a point here, but there are several practical issues concerning the different variants of 1080p that need to be kept in mind. 1080p/24 especially, and 1080p/30 to a lesser degree, have readily perceived flicker on a number of displays; more to the point, these aren't formats used by any broadcast networks or syndicators, and much of our HD studio equipment does not even support these frame rates. Are they valid under the ATSC standard? Sure... but as a practial matter they are irrelevant to over-the-air broadcasters.
On the other hand, 1080p/60 represents a qualitative improvement over both 720p and 1080i as generally implemented, and is the frame rate most people infer when you talk about 1080p.
To say that we can't encode 1080p into an ATSC system isn't so much a myth as a shorthand that addresses the only variant someone would likely want to encode, and ignores the others.
HDD-5, HDCAM, & HDCAM SR all support 1080PsF/23.98, 1080PsF/24, 1080PsF/29.97, & 1080PsF/30. The HDD-5 also support all of those frame rates in total P. So I don't understand your comment about no studio decks support those frame rates.