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Discussion in 'DIRECTV Programming' started by Sixto, May 29, 2012.
Brain fart--what's linear HD? I forgot.
Regular HD full-time CONUS channels ... no push or anything special ...
I always thought it was used for insertion of local commercials on CONUS channels. They do push local commercials to my DVR, and use them on certain channels I believe.... is that done through channels/transponders you might not even be able to see? (Do they use Spotbeams for those pushes, would make sense too)
They're starting to slip CINEHD into 1060 slots now? That's probably a positive, so far as getting further up the max curve on that theoretical 44 new HD slots.
Is cinehd 24fps? You should easily fit 6 per TP then. Show time and Starz have been multiplexing big qty's of their movie channels for years now and I thought part of it was slightly reduced framerate.
Well, looking at the map (not updated yet for this morning), the pattern that jumps out is that if there are two or more Cinema HD on a TP, that TP only has 4 channels on it, not 5.
Dunno if that's a recent phenomenon or not.
well that or the PPV / part time feeds slots.
try again now, gct posted new revision ...
Would make sense as the Cinema channels are 1080p and would require more bandwidth.
Are they? I know internet downloads can be 1080p, but are the channels?
As far as I know, yes. I don't use PPV much, but they show with a 1080p logo in my guide.
I've always questioned though;
Unless the increase in bandwidth is due to far less compression being applied to the 1080p Cinema PPV programs in the 100-200 ch. # range.
All other things equal, 1080i sending 540 lines at 60 fields/s requires more bandwidth than 1080p at 24 frames/s.
Nope, there are no "lines", MPEG sending base pictures and updates [P,B] to them in format 1920x1080 pixels. No lines ! But FR is 30 FPS for whole picture combined from two and each has have of half of full scan (odd,even) as inheritance of old analog TV standard/equipment.
Oh I didn't mean it was exactly conveyed in that way (line by line) in an encoded MPEG stream.
But from beginning to end 540 lines@60 fields/s from source to display must be sent for 1080i vs. 1080 lines@24 frames/s for 1080p regardless of the precise way its formated at some point in between.
I think the bandwidth between 1080i & 1080p/24 turns out to be about the same, due to the change in frame rate.
Exactly, 1080i/60 is 60 540x1920 fields per second, which the display deinterlaces to 30 1080x1920 fields per second. 1080p/24 is 24 1080x1920 fields per second, or actually slightly LESS data than 1080i/60.
I need to study this further ... they may have just moved the push to D10 ... now two transponders of push on D10.
Ah, you are correct. We sometimes watch PPV, but only the pre-downloads or internet downloads, never the PPV numbered channels. But now that you point it out to me, I see it in the guide that way as well. Tho as Titan25 points out, if it is 1080p24, then it is actually somewhat less bandwidth than 1080i, all things being equal (i.e. compressability and encoder efficiency for the content).