Originally Posted by JamesCT
Do they actually employ engineers there who can add 1080 + 480 + 480 + 480 and see that this is more physical bandwidth than is allocated on a single channel?
How do you figure, let's crunch numbers here:
Program 3 @ 12mbps w/ 384k audio for surround, 1080i, + Program 4 @ 2mbps w/ 128k audio stereo, 480i + Program 5 @ 2mbps w/ 128k audio stereo, 480i, + Program 6 @ 2mbps w/ 128k audio stereo, 480i, + 200kbps for guide data and PSIP = 18.968mpbs w/ 422kbps of "stuffing" = 19.39mbps. Oh gosh, you're right, it doesn't add up.
(The above values are set at CBR w/ 1 day of guide data)
I hate it, with a passion, when people try to arm-chair quarter back engineering for a station, and trash the station's engineering staff. I've seen it on these forums time and time again. You can make a point without attacking a station's engineering staff.
I know some of the engineering staff at CPTV, and they do a fine job. They probably tried to stat-mux the 4 program streams , like what WGBX in Boston does, but determined that anytime you have an SD stream running below 3 mpbs, especially a sports channel, it looks lousy.