Originally Posted by James_in_Utah
Surveyed my channels this morning. Noticed that the ABC affiliate was sending out 3 days of PSIP. Great! CBS and NBC and ION are all sending out 11 hours worth or so. One of the PBS channels was sending out 12, the other PBS channel was sending out none. I called them up when I got to work. Finally got to the engineer, and he confirmed it wasn't working, and they had just not noticed. I asked him how much they send out, and he said as a personal preference of his, he likes to send out 3 days. He said they have 20 MBytes to allocate to the two sub channels, and that sending out 3 days of data takes about 1 MBytes, and that actually sacrifices some picture quality. I told him I appreciated the 3 days of data, and would let him know if I see any picture quality issues since I'm watching on a repeater. Anyway, so far my box is working just fine with PSIP.
19.3 Mbps, to be precise. </spock> My completely subjective observation is that you need about 10Mbps for reasonable HD and 2.5Mbps for reasonable SD, plus a little more for audio; perhaps a bit less if a statmux is used. But it is subjective and depends on things like the size of your TV screen, so some find anything under 15Mbps for HD unacceptable.
I'm actually a bit surprised a 3-day guide takes even 1Mbps bandwidth. Generally, the further in the future an EIT block is, the less frequently it's transmitted, so you can send out quite a bit of guide data without sacrificing picture quality. (The details may depend on the station's equipment, though.) The trade-off is that it takes longer for a box like the Pal to download all the guide data, so it may not get all the data during its automatic scans. If you see less guide than you think you should, try "lingering" on the channel for a few minutes and see if the rest eventually fills in.
Originally Posted by ko220
Originally Posted by JHBrandt
WATL is a full-power station, so they should be sending some
guide info. But it might have gotten messed up. I've seen that happen here in the DFW area. Sometimes it can take weeks to get a station's EPG fixed! WATL may not have even known it was on the fritz until you emailed
Oh, Snap! I have had the best luck with the local stations yesterday. I did email WATL, and lo and behold, they wrote me back and the program guide miraculously appeared that afternoon. I also contacted every broadcast station in Atlanta and asked them to consider expanding their listings from 12 hours to 72 or more. I was very polite in the email, and just pointed out that having expanded program listings affects what shows we watch.Our ABC station instantly went up to 24 hours, and said they would see how it goes for 48 (something about if they send out too much info, it interferes with people's ability to view the channel?) All the other stations said they would look into going at least to 48. While it isn't the full week we used to have with TVGOS, it's still pretty good.
I'm often surprised how few
folks actually pay any attention to the guide info. Mostly it's just folks with PSIP-based DVRs like us that care what's on more than a few hours from now. So it's really easy for these things to go out and for no one to notice, let alone complain.