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This being after the OTA (over the air) analog shutdown.
Let's cover the common case first, a network station, hence they broadcast in HD.
Answer 1:
Nothing. The D* SD LIL feed is what they received OTA analog from an antenna in the market and sent up to the satellite. Once the local station stops analog transmission, D*'s local feed will go dark or just plain disappear as a channel.
This would be great from D*'s point of view, it saves a lot of bandwidth. It also reflects the "real world". But there's a problem. Anyone with an MPEG-2 only receiver (most non-HD receivers) will not be able to receive any locals at all.
Answer 2:
You will see a downrezzed letterboxed version of the ATSC OTA station that D* creates in-house.
This keeps those with MPEG-2 receivers working. But it wastes bandwidth. And, since HD-capable stations tend to broadcast ONLY in HD (16:9), that means that when watching an SD program (4:3), it will be pillarboxed to 16:9 at the station and then letterboxed to 4:3 by D*, making a small picture with black borders on all 4 sides. And those with SD sets likely do not have a "zoom" button to correct for this. A person with an MPEG-2 receiver/SDTV literally will never see a program on a major network that fills the entire screen. It'll either be letterboxed or doubleboxed. If you have a 16:9 SDTV, you're in almost the same boat, although you can hit the zoom button to get out of the doublebox problem.
Answer 3:
You will see a downrezzed anamorphic (16:9) version of the ATSC OTA station that D* creates in-house.
This also keeps those with MPEG-2 receivers working. Those with 16:9 SDTVs can now see proper 16:9 shows (in SD) and 4:3 will be pillarboxed by the station. But anyone but anyone without a widescreen TV has no way to correct the anamorphic stretch.
Answer 4:
Your local station will create a special SD feed for cable and SAT customers. This will be 4:3. D* will put that in the SD slot.
In reality, what station is going to keep producing a 4:3 signal when they don't broadcast it over the air? Knowing the TV stations, there's no guarantee this won't be doubleboxed anyway.
For ATSC SDTV stations (480i/480p 4:3), things work a lot better.
Answer 1:
You get an MPEG-2 SD version of the SD station in the slot. Seems pretty straightforward. D* neither saves nor loses bandwidth from before.
Answer 2:
Nothing. D* drops the MPEG-2 LIL version of this since they were dropping all the other network LILs. (This seems as unlikely as the "go dark" possibility above).
All in all, I think I learned a couple things here.
1. Woe to the people using converter boxes or D* MPEG-2 receivers. Unless they have auto de-pillarboxing, people with SD TVs will be staring at a lot of doubleboxed content and will be unhappy.
2. I think it's likely the network stations will have absolutely zero use for any program that isn't 16:9 after Feb 17th, 2009. Wondering when reality TV would go HD (or at least 16:9)? You know the date now. With stations no longer producing 4:3 signals, 16:9 becomes king.
3. Boy, I bet D* wishes they had rolled out MPEG-4 receivers to everyone by now. Even if they can't output HD. They could go dark on the old MPEG-2 LILs and save a lot of bandwidth.
Let's cover the common case first, a network station, hence they broadcast in HD.
Answer 1:
Nothing. The D* SD LIL feed is what they received OTA analog from an antenna in the market and sent up to the satellite. Once the local station stops analog transmission, D*'s local feed will go dark or just plain disappear as a channel.
This would be great from D*'s point of view, it saves a lot of bandwidth. It also reflects the "real world". But there's a problem. Anyone with an MPEG-2 only receiver (most non-HD receivers) will not be able to receive any locals at all.
Answer 2:
You will see a downrezzed letterboxed version of the ATSC OTA station that D* creates in-house.
This keeps those with MPEG-2 receivers working. But it wastes bandwidth. And, since HD-capable stations tend to broadcast ONLY in HD (16:9), that means that when watching an SD program (4:3), it will be pillarboxed to 16:9 at the station and then letterboxed to 4:3 by D*, making a small picture with black borders on all 4 sides. And those with SD sets likely do not have a "zoom" button to correct for this. A person with an MPEG-2 receiver/SDTV literally will never see a program on a major network that fills the entire screen. It'll either be letterboxed or doubleboxed. If you have a 16:9 SDTV, you're in almost the same boat, although you can hit the zoom button to get out of the doublebox problem.
Answer 3:
You will see a downrezzed anamorphic (16:9) version of the ATSC OTA station that D* creates in-house.
This also keeps those with MPEG-2 receivers working. Those with 16:9 SDTVs can now see proper 16:9 shows (in SD) and 4:3 will be pillarboxed by the station. But anyone but anyone without a widescreen TV has no way to correct the anamorphic stretch.
Answer 4:
Your local station will create a special SD feed for cable and SAT customers. This will be 4:3. D* will put that in the SD slot.
In reality, what station is going to keep producing a 4:3 signal when they don't broadcast it over the air? Knowing the TV stations, there's no guarantee this won't be doubleboxed anyway.
For ATSC SDTV stations (480i/480p 4:3), things work a lot better.
Answer 1:
You get an MPEG-2 SD version of the SD station in the slot. Seems pretty straightforward. D* neither saves nor loses bandwidth from before.
Answer 2:
Nothing. D* drops the MPEG-2 LIL version of this since they were dropping all the other network LILs. (This seems as unlikely as the "go dark" possibility above).
All in all, I think I learned a couple things here.
1. Woe to the people using converter boxes or D* MPEG-2 receivers. Unless they have auto de-pillarboxing, people with SD TVs will be staring at a lot of doubleboxed content and will be unhappy.
2. I think it's likely the network stations will have absolutely zero use for any program that isn't 16:9 after Feb 17th, 2009. Wondering when reality TV would go HD (or at least 16:9)? You know the date now. With stations no longer producing 4:3 signals, 16:9 becomes king.
3. Boy, I bet D* wishes they had rolled out MPEG-4 receivers to everyone by now. Even if they can't output HD. They could go dark on the old MPEG-2 LILs and save a lot of bandwidth.