Originally Posted by Falcon_77
Assuming that KABC is following other ABC O&O's, we will have to deal with an *HD sub-channel* on KABC.
ABC's picture quality isn't that great already, but it looks like it's going to only go downhill from here.
There's no assumption. KABC made a very big splash on their news programs today. By tomorrow it will be operating--if it isn't up already.
Originally Posted by HarrisonS
That will be an unprecidented
move here! Two HD subchannels at once - I don't think it could possibly look very good at all. At 720p to begin with, I wonder how "HD" it could still be!
I'm amazed too. I've already realized that the 1080 vs 720 could have a lot to do with what's left over for sub-channels, but I never dreamed you could have two 720s going at the same time.
I've been wondering if they are just using the wrong terminology, saying "high definition" when they meant "digital," i.e. just another SD sub-channel.
Originally Posted by HoTatII
Of course this gets into the classic "which is better 720P vs. 1080i" debate, but I thought the reality is that they both transmit approximately the same amount of information as an HD standard and thus require about same amounts of bandwidth. For instance what 720P looses to 1080i in transmitted lines per frame, it pretty much regains in the 2X frame rate of 60/s as opposed to 30/s for 1080i.
However, I agree in how I do not see this as very practical since a good quality HD signal of either format is around 10-12 mb/s at MPEG-2. So one of the sub-channels is going to have to suffer some appreciable degradation here.
I've often thought the same thing. Upon the initial debut of HDTV and upon reading the tech literature I didn't see how 1008i could possibly be better than 720p, since the 1080i requires significantly more compression. I thought it was just moving the interpolation from the receiver to the station. Now that I've seen the difference I believe my lying eyes. Even on a 720 television I'm convinced that I can see the difference, that 1080i looks better. It's subtle but I believe the 1080i looks better.
You've all read Randy Hoffner's piece
, right? It made a lot of sense when I first read it, but that was way before I ever had my own HDTV. Now that I've seen the difference (or lack thereof) to me the report just doesn't play out.
Here in Los Angeles it seems that the 720p stations are running more sub-channels on the average. I had assumed the 1080 vs 720 trade-off had something to do with the ability to host sub-channels.
It will be amusing to see the signal tomorrow. I don't see how they can pull it off. But hey, let's just see it tomorrow. I've never seen two HD channels on the same carrier...
And worse, I'm a cooking enthusiast interested in healthy cooking--and their channel concept looks really sucky. I'll be amazed if they attract an audience.