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Comcast HDTV - Page 384

post #11491 of 11976
The guide here shows 11 HBO and 7 ST channels. Appears only 1 HBO and 1 ST are HD. I don't subscribe so don't know what the PQ is.
post #11492 of 11976
Quote:
Originally Posted by Cal1981 View Post

And to my knowledge, Comcast seems to be reluctant to do a final digital conversion of the channels below 34 in the Bay Area. That would free up a bit of bandwidth.

That will most likely not last long. The FCC required cable companies to keep analog for local stations through February 2012. After that they can vote again to see if they will extend it.

Here are a couple of articles that I found about it:
Cable Television and the Digital Transition
FCC to cable: You must support analog TVs until 2012
post #11493 of 11976
Quote:
Originally Posted by CaptMorn2374 View Post

That will most likely not last long. The FCC required cable companies to keep analog for local stations through February 2012.

That's is ONLY if an operator offers ANY other analog signals - you missed this part of the article:

Quote:


they can offer digital SD only and roll out converter boxes to all their subscribers (which could be expensive).

CC is/has ALREADY done this very thing on about 1/2 dozen of their systems. (Augusta, GA is one that comes to mind) In these markets, they offer all limited basic subs 3 DTA's at no extra charge. Why they haven't started doing this on the rest of their systems (such as in SF with ALL those bandwidth-hogging analogs) is beyond me - but they ARE supposed to eventually be eliminating ALL analog signals on most, if not all their systems. Considering their limited basic subs are a fraction of their expanded basic+ subs, it should NOT take that long to get those subs the DTA's out in a timely matter. (but this IS CC after all...)

There are actually several other cable systems that have NO analog at all &/or have not for some time: Bend Broadband (OR), RCN, Massillon Cable (OH), San Bruno Cable (CA) & some Cablevision systems come to mind.
post #11494 of 11976
I did see the "CAN" and "expensive" parts of the article and that pretty much answered it for me. I live in Seattle, where the subscriber base is about 1.2 million in out system. About 12-15% is limited only subscribers. That is a lot of equipment for the company to buy and then lease (at no cost or at a cost)to their customers, especially if there is a potential of 3 for each household.

There are other stations carried on our analog system besides locals, such as Hallmark and Discovery channels. Does that mean that they can't switch over yet?

Comcast also doesn't do everywhere at once. They generally roll out market by market over a few months or year when they do upgrades or new initiatives.
post #11495 of 11976
OK, I know this thread is about COMCAST, just wanted to compare and contrast my last two hotel stays with CC digital. At two "high" class hotels in the DC area I stayed at last week all they had was analog video from Lodgenet (tm) !? Disgusting. I had a CRT TV in one hotel and plasma at the other hotel (looked like 720p display). Both suffered from analog type intereference: ghosts, snow, fade outs, interference, etc. - no digital noise artifacts. Sheesh. Makes me appreciate my CC HD digital and 42 inch 1080p plasma TV.
post #11496 of 11976
Quote:
Originally Posted by dishrich

That's is ONLY if an operator offers ANY other analog signals - you missed this part of the article:

CC is/has ALREADY done this very thing on about 1/2 dozen of their systems. (Augusta, GA is one that comes to mind) In these markets, they offer all limited basic subs 3 DTA's at no extra charge. Why they haven't started doing this on the rest of their systems (such as in SF with ALL those bandwidth-hogging analogs) is beyond me - but they ARE supposed to eventually be eliminating ALL analog signals on most, if not all their systems. Considering their limited basic subs are a fraction of their expanded basic+ subs, it should NOT take that long to get those subs the DTA's out in a timely matter. (but this IS CC after all...)

There are actually several other cable systems that have NO analog at all &/or have not for some time: Bend Broadband (OR), RCN, Massillon Cable (OH), San Bruno Cable (CA) & some Cablevision systems come to mind.
Comcast of Willow Grove (suburban philly) is shutting off all analog mid September. I recu Ed the mailer about it a few weeks ago. I hope they add some new hd, as we are still a 750 system and lack quite a bit compared to philly.
post #11497 of 11976
Quote:
Originally Posted by Satcom15 View Post

OK, I know this thread is about COMCAST, just wanted to compare and contrast my last two hotel stays with CC digital. At two "high" class hotels in the DC area I stayed at last week all they had was analog video from Lodgenet (tm) !? Disgusting. I had a CRT TV in one hotel and plasma at the other hotel (looked like 720p display). Both suffered from analog type intereference: ghosts, snow, fade outs, interference, etc. - no digital noise artifacts. Sheesh. Makes me appreciate my CC HD digital and 42 inch 1080p plasma TV.

some place have HD with analog mixed in HD one place had ESPN HD, ESPN 2 HD and other HD + HD net movies but WGN america on analog.


now comacst needs to do something like Directv's Residential Experience for Hotels.

I hear that time warner has cable boxes with custom software for hotels.
post #11498 of 11976
Quote:
Originally Posted by Joe The Dragon View Post

some place have HD with analog mixed in HD one place had ESPN HD, ESPN 2 HD and other HD + HD net movies but WGN america on analog.


now comacst needs to do something like Directv's Residential Experience for Hotels.

I hear that time warner has cable boxes with custom software for hotels.

Interesting - Mixed analog/digital service. Who'd a thunk it. Why not just go with all digital? And, where does Lodgenet get its analog programming? Do they take the digital channels then convert to analog? One of the hotels I stayed at had just been refurbished, so you would have thought it would be all digital from the outset. Curious.

Oh well, whenever I see Lodgenet for hotel TV service I anticipate poor programming.
post #11499 of 11976
HTBruceM discovered that Comcast is really aggressively recompressing a local station even though the station has made unusual decision to devote their entire bandwidth to their HD channel. They're taking a bit rate slightly over 18.1 Mbps (remember those?) and squashing it down to a little over 10 Mbps.

What does this look like? Look at the opening of How I Met Your Mother:

Fairly detailed OTA screenshot.

Blurry blocky Comcast screenshot.

This is really bad. With SEC football on the way I'm glad I have an antenna.
post #11500 of 11976
Comcast regularly puts 2 and sometimes 3 HD channels into one QAM freq, so this is not surprising (although disappointing). Here in the ATL they don't load more than 2 OTA channels on one QAM.
post #11501 of 11976
Quote:
Originally Posted by slowbiscuit View Post

Comcast regularly puts 2 and sometimes 3 HD channels into one QAM freq, so this is not surprising (although disappointing). Here in the ATL they don't load more than 2 OTA channels on one QAM.

You can fit two full bit rate ATSC channels onto one QAM channel without any loss or recompression. A QAM channel has twice the bit rate of an ATSC channel.
post #11502 of 11976
Quote:
Originally Posted by scowl View Post

You can fit two full bit rate ATSC channels onto one QAM channel without any loss or recompression. A QAM channel has twice the bit rate of an ATSC channel.

In virtually all areas where CC has or is in the process of transitioning to an all digital system, they are encoding 3 HD channels per encoder, which does require some recompression. With software allowing real time, variable compression per channel, it generally works better than it should (certainly better than U-verse (especially when delivered to the home via old copper cabling). However, if you try doing what KTRK-13 and other ABC O & O stations are required to do...encoding 2, 720p channels (ABC and Living Well), and you try replacing "Living Well" with say a NASCAR race while football is running on ABC......then you get a major case of compression artifacts on both channels. The same thing happens if more than one of the 3 channels that CC encodes requires a large amount of bandwidth at the same moment. In fact, folks who wonder why QAM channel assignments change more often than one might think reasonable are simply experiencing the results of CC engineers trying to find more compatible channel combinations per encoder.

In short, there's no substitute for greater bandwidth when there are fast moving, highly detailed programs on multiple HD channels.
post #11503 of 11976
Quote:
Originally Posted by hdguru View Post

In virtually all areas where CC has or is in the process of transitioning to an all digital system, they are encoding 3 HD channels per encoder

But does this include OTA ATSC HD channels???

I was told by one of mods here that this is NOT the case, but...
post #11504 of 11976
Quote:
Originally Posted by hdguru View Post

In virtually all areas where CC has or is in the process of transitioning to an all digital system, they are encoding 3 HD channels per encoder, which does require some recompression. With software allowing real time, variable compression per channel, it generally works better than it should (certainly better than U-verse (especially when delivered to the home via old copper cabling). However, if you try doing what KTRK-13 and other ABC O & O stations are required to do...encoding 2, 720p channels (ABC and Living Well), and you try replacing "Living Well" with say a NASCAR race while football is running on ABC......then you get a major case of compression artifacts on both channels. The same thing happens if more than one of the 3 channels that CC encodes requires a large amount of bandwidth at the same moment. In fact, folks who wonder why QAM channel assignments change more often than one might think reasonable are simply experiencing the results of CC engineers trying to find more compatible channel combinations per encoder.

In short, there's no substitute for greater bandwidth when there are fast moving, highly detailed programs on multiple HD channels.

The packing of 3 HD channels per QAM is done with national HD channels that are sourced from Comcast Media Center in Colorado and have nothing to do with local OTA HD channel transmission. I can't speak for other Comcast markets, but here in the San Fransisco bay area market, which is likely Comcast's second largest market, Comcast does not pack 3 local HD channels per QAM the last time I checked anyway. Each station is afforded the equivalent of one half a QAM channel, essentially 19mb/s. Now, if a station is using multiple sub-channels, such as ABC with their 2 "HD" channels and some SD channels, they still only get 19mb/s worth of bandwidth to squeeze all that data into. If they're only running 1 channel, I think our CBS station, KPIX, is still only using 1 channel, then they can utilize that full 19mb/s worth of bandwidth. There are several other national channels that also are packed only 2 per QAM such as ESPN, TNT and I believe Discovery HD(or what ever it's called now).
post #11505 of 11976
Quote:
Originally Posted by dishrich View Post

But does this include OTA ATSC HD channels???

I was told by one of mods here that this is NOT the case, but...

As I noted in my last post, to the best of my knowledge, Comcast still does not pack local OTA stations more than 2 per QAM. What those stations do with that bandwidth is up to them, but each station is provided with half of QAM's worth of bandwidth.
post #11506 of 11976
Here in CO, our local PBS station crams 3 channels (HD prime program and SD Create and V ME) into one channel. Even OTA the video is the pitts compared to HD (and even better BluRay) disks of the same program. On Comcast we used to see lots of digital artifacts (pixelation, freezes, dropouts, etc.). It was hard to tell if that was Comcast or the source (I'd see similar instances but not as bad OTA). One of the guys here locally has a relatively inexpensive satellite receive setup and gets the Ku-Band national feed. He says the difference is night and day.
post #11507 of 11976
Same here with PBS Knowledge and Kids SD channels, but they are very low bitrate so the main HD feed still looks great to me either OTA or on Comcast.
post #11508 of 11976
Quote:
Originally Posted by keenan View Post
As I noted in my last post, to the best of my knowledge, Comcast still does not pack local OTA stations more than 2 per QAM.
Then it's a mystery why our Comcast is recompressing our CBS affiliate down to 10-11 Mbps. They've been broadcasting a full 18 Mbps HD stream since mid-June and it's the best HD I've seen in years.
post #11509 of 11976
Quote:
Originally Posted by scowl View Post
Then it's a mystery why our Comcast is recompressing our CBS affiliate down to 10-11 Mbps. They've been broadcasting a full 18 Mbps HD stream since mid-June and it's the best HD I've seen in years.
I suppose anything is possible in any given market. Have you contacted the station to see if they can shed some light on why it's happening?
post #11510 of 11976
Maybe things have changed, but a couple of years back I remember the FCC not allowing TV providers to re-compress local TV ATSC stations. Has this changed?
post #11511 of 11976
Quote:
Originally Posted by keenan View Post

I suppose anything is possible in any given market. Have you contacted the station to see if they can shed some light on why it's happening?

I haven't because I still have my antenna () but I hope others will.

This was the one station in the area which for years refused to let Comcast rebroadcast their HD channel.They have a contentious history.
post #11512 of 11976
I live in West Jordan but this likely applies to all of the Salt Lake City area, saw this in my bill for this month....finally getting Fox Soccer HD!

Quote:


Effective October 31, the following channel changes will take place: BBC America (162) will move from Digital Preferred to Digital Starter. The following HD channels will be dropped but the content will be carried On Demand and standard definition: 5StarMax (733), ActionMax (732), HBO Comedy (731), HBO Family (741), HBO Signature (740), and MoreMax 742). The following channels will be added to the Sports Entertainment Package: Tennis SD (405), Tennis HD (749), Fox Soccer HD (732)and NHL HD (733). The following HD channels will be added to Digital Starter: Oxygen (742), BBC America (740), and Galavision (731). Galavision HD will also be added to Multilatino Max. Fox Soccer HD (732) and NHL HD (733) will be added to Digital referred.

+ Tennis HD (749) (this actually happened last week I believe)
+ Fox Soccer HD (732)
+ NHL HD (733)
+ Oxygen (742)
+ BBC America (740)
+ Galavision (731)

- 5StarMax (733)
- ActionMax (732)
- HBO Comedy (731)
- HBO Family (741)
- HBO Signature (740)
- MoreMax (742)
post #11513 of 11976
Interesting. We don't have Tennis or FSC in HD here in Atlanta. We do have NHL, Oxygen and BBC America. Don't know or care about Galavision.
post #11514 of 11976
Game2 HD added in Baltimore.
post #11515 of 11976
1st time here
Hello everyone
Anyone have problem with comcast reset cable box?
Comcast keep reset my cable boxes every almost week, I'm getting tired of this BS ...from them. If this question already answers, please point it to me
Thank You
BTW I'm from Md.
post #11516 of 11976
Quote:
Originally Posted by n o o d l z View Post

I live in West Jordan but this likely applies to all of the Salt Lake City area, saw this in my bill for this month....finally getting Fox Soccer HD!



+ Tennis HD (749) (this actually happened last week I believe)
+ Fox Soccer HD (732)
+ NHL HD (733)
+ Oxygen (742)
+ BBC America (740)
+ Galavision (731)

- 5StarMax (733)
- ActionMax (732)
- HBO Comedy (731)
- HBO Family (741)
- HBO Signature (740)
- MoreMax (742)

Got a mailing in DC about set top boxes. Assume this means they're eliminating analogs, freeing up some bandwidth for some more HD channels and (hope) that we'll finally get FSC-HD, and some additional HBO/SHO in HD. Please!
post #11517 of 11976
Quote:
Originally Posted by commodore_dude View Post

Interesting. We don't have Tennis or FSC in HD here in Atlanta. We do have NHL, Oxygen and BBC America. Don't know or care about Galavision.

Galavision does have soccer matches from MLS and other leagues on there. On that note... come on Comcast hurry up and get Fox Soccer HD here in the Twin Cities.
post #11518 of 11976
Quote:
Originally Posted by Marcus Carr View Post

Game2 HD added in Baltimore.

And in DC.

Also, there are "blank" listings for Chs. 970-972 on the programming guide. Anyone have an idea what's going there?
post #11519 of 11976
Quote:
Originally Posted by Marcus Carr View Post

Game2 HD added in Baltimore.

Wow! We don't even have game1 hd in harford county. What channels are they using for these?
post #11520 of 11976
Quote:
Originally Posted by iontyre View Post

Wow! We don't even have game1 hd in harford county. What channels are they using for these?

787 Team HD
789 Game1 HD
790 Game2 HD
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