Originally Posted by PooperScooper
Too much compression can degrade PQ. Or cable providers putting too many feeds on one QAM channel.
Word on the street is that, because Cablevision can't afford anything better than 4 HD per QAM, they're only sending 9 Mbps for each of their four HD channels (AMC, IFC, WE, whatever the other is) to everyone, so no one can say Cablevision looks worse. So, everyone gets to watch AMC HD as if it were crammed on one QAM with four other channels, whether or not that is actually the case. As a result of this practice, even Verizon has decided to put all four on one QAM to free up bandwidth for programming that would actually benefit from the higher bandwidth.
If you're interested in PQ, it seems like your best bets are VOD (possibly), iTunes (only 720p), or just waiting for the Blu Rays.