Yep, they sure do. So that’s another way they can save bandwidth. Do away with the simulcast on satellite and have just a primary HD service (just like ABC HD which doesn’t have an SD simulcast at all). All they would need to do then is some down conversion trickery at each terrestrial site to meet terrestrial SD simulcast requirements. Every site is already capable of converting MPEG-4 SD to MPEG-2 SD, so surely they can convert MPEG-4 HD to MPEG-2 SD as well? There’s no other reason they need 2 x WIN’s on VAST. Every single viewer has a VAST Certified MPEG-4 HD set-top box.
I could go on and on about how much VAST/networks misuse precious satellite bandwidth, but I think I’ve said it here enough times. Just racks my brain.