Although several TVs can't output 720p, most can accept a 720p signal and upconvert it to 1080i. CRT HDTVs usually only output 480p and 1080i, but they usually accept a 720p signal and upconvert it to 1080i. Without the ability to do this, they would likely not pick up a lot of HD channels that way.
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Although several TVs can't output 720p, most can accept a 720p signal and upconvert it to 1080i. CRT HDTVs usually only output 480p and 1080i, but they usually accept a 720p signal and upconvert it to 1080i. Without the ability to do this, they would likely not pick up a lot of HD channels that way.