I've recently purchased a Panny plasma. I have Comcast analog cable and have the cable hooked directly to the TV. I am able to receive HD channels from OTA broadcasters. I believe this is refered to as Qam or clear Qam. What perplexes me is that a couple of local channels (this is from the Boston area, WLVI and WSBK) the HD channel is shown in the AR of 4:3 but the analog channel is shown as 16:9 for the same program. This confuses me because doesn't the HDTV specs call for 16:9? So I wondering are these programs being shot at 4:3 or 16:9?