OTA gets 13 MB/s, and I'm pretty sure that's what Cable uses. That's not really enough for 1080i. I know that DirecTV moved to MPEG4. Not sure if it helped at a

OTA gets 13 MB/s, and I'm pretty sure that's what Cable uses. That's not really enough for 1080i. I know that DirecTV moved to MPEG4. Not sure if it helped at all. And FiOS using more bandwidth than OTA, I believe.