Cable TV High Definition converter


My brother in law told me today (I am a newbie to home theater) that if I have cable (Comcast) the HDTV signal being sent over the cable is being compressed and that there is a box I can buy that decompresses it so that I get true (or at least better) HDTV. Is this true? If so, what is this box called? What brands are there? Is any one of them better than another?

Thanks
jaw11

Showing 2 responses by quicke

I have also heard the compression comment. I use a cox cable converter (I think Motorola) for DiscoveryHD, ESPNHD, HBOHD, INHD1 & INHD2 and a Zenith OTA receiver for the networks and can not really tell the difference. In fact, it appears to me to be driven more by content quality than anything else I can see. Some of the geographic stuff on DiscoveryHD is breathtaking while yesterday's NFL playoff game on ABC was just good. PBS over the air has some high quality stuff and HBO's movies can be soft. WRT the latter, my understanding is that that relates to the studios being nervous about the potential for bootlegging high quality digital movies. The same rationale for holding back on HD-DVD's.
Equal to or better than DVD? They better be better than DVD, 1080 vs 480 lines!