Technical question: Is BEV 1080i or 720p?

  • Thread starter Thread starter travisbell
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I can confirm the following for the channels listed below. I am still waiting to hear back about the resolutions of the channels not listed (I'm not able to check this out myself unfortunately).

ABC HE: 1280x720, 16000 kbps, 384 kbps
GLB HE: 1280x720, 65000 kbps, 384 kbps
CBS HE: 1280x720, 16000 kbps, 384 kbps
CBC HE: 1280x720, 65000 kbps, 384 kbps
SRC HE: 1920x1080, 27999 kbps, 384 kbps
FOX HE: 1280x720, 16000 kbps, 192 kbps
NBC HE: 1920x1080, 16000 kbps, 384 kbps
PBS HE: 1920x1080, 65000 kbps, 384 kbps
A&E HD: 1280x720, 65000 kbps, 192 kbps
SN HD: 1280x720, 65000 kbps, 384 kbps
WGN HD: 1920x1080, 27999 kbps, 384 kbps
CTV HW: 1280x720, 65000 kbps, 384 kbps
ABC HW: 1280x720, 16000 kbps, 384 kbps
CBS HW: 1920x1080, 27999 kbps, 384 kbps
PBS HW: 1920x1080, 65000 kbps, 384 kbps
M HD: 1280x720, 65000 kbps, 384 kbps
MC HD1: 1280x720, 65000 kbps, 384 kbps
Discovery HD: 1280x720, 14000 kbps, 384 kbps
Raptors HD: 1280x720, 16500 kbps, 384 kbps
Treasure HD: 1280x720, 65000 kbps, 384 kbps
Oasis HD: 1280x720, 65000 kbps, 384 kbps
HD Net: 1920x1080, 65000 kbps, 384 kbps (VBR 177 kbps)
Rush HD: 1280x720, 65000 kbps, 384 kbps
Equator HD: 1280x720, 65000 kbps, 384 kbps
BTV HD (? carrier alone, no stream yet)
Vu HD: 1280x1080, 27999 kbps, 384 kbps
Vu HD1: 1280x720p, 27999 kbps, 384 kbps
Vu HD2: 1280x720p, 27999 kbps, 384 kbps
Vu HD3: 1280x720p, 27999 kbps, 384 kbps
Vu HD4: 1280x720p, 27999 kbps, 384 kbps
Vu FHD: 1280x720p, 27999 kbps, 384 kbps

Unknown: Vu FH1, NFL H1, NFL H2, NFL H3, NFL H4, NFL H5, NFL H1*, NFL H2*, NFL H3*, NFL H4*, NFL H5*, NHL H1, NHL H2, NHL H1*, NHL H2*, NCAA7, NCAA8, NCAA7*, NCAA8*, LFS HD: (tagged as "Data" so far)
 
Alot also depends on how long they have been working there. There is actually alot of stuff they have to learn and alot of the people never used BEV before doing this job. They cannot possibly learn everything during their training.
 
And Bell states in their support section -->

"Question:
How many HDTV formats are available with Bell ExpressVu hardware?

Answer:
Bell ExpressVu provides their customers 1080i and 720p HDTV formats. They pass formats offered by broadcasters on to the customers."

They do seem to get around the requirement to pass on the formats by asking the broadcaster for 720p as they did with Global (as stated in previous posts)
 
This is what I was not sure about: is the transponder bandwidth limit still 30 Mbps?
I thought it could have changed over the last 2 years.

Diogen.
 
No such luck, the laws of physics still apply. :cool: EV could increase the bandwidth by using better compression such as 8PSK or MPEG4 (like Dish.) Using 8PSK would obsolete all 6000 receivers and EV has no receivers that handle MPEG4. That may change in future though.
 
I have my 9200 and my HDTV set to 1080i, I've tried them at 720p but to my eyes the 1080i setting seems to have more detail, if it's broadcast in 720p shouldn't that setting look better?
 
My info is acurate as of May 15, 2006. As long as BEV continues to provide the great number of channels they do in HD, they can not pass on native 1080i.
 
Can you check those numbers again. I would expect something in the range of what 57 said. You are listing single channels with 28 and 65mbps!
 
So, you don't want Bell to compress at all? Meaning they run out of space on their satellite and have to delete HD channels?
 
BEV carried HDNET as 720P when I recorded the Velvet revolver concert earlier today using my 6000 and nextcom usb hdtv recorder.
 
what I it would like is that ExpressVu wake up and that it adds a function to the 9200 so that it can outpout the native resolution of channel synthonized rather than only one fixed resolution.

In this way we would stop making double treatment with our display.

ex.

Display native 1280 x 720p
Channel brodcast in 1280 x 720p
9200 set to 1080i

in 720p-9200 scale it to 1080i-display re-scale it in 720p

:mad:
 
Be careful. Those bitrates are the maximum value written in the stream, not the real value. For a TP with 2 HD, don't expect more than 14,500 Mbps for video bitrate. You need to record the channel to get the real value, and do it several time to get a good average.

Falcon, thank you for that list. I was looking for a list like that for a long time. There is a lot more re-encoding than I was expecting...

Kaphyr
http://illico2.tripod.com/
 
Missed this reply in my inbox...

Thanks for the news, answers my question very nicely!

Cheers,
 
Compression and reducing the bit rate are two separate issues. Compression basically just makes the signal fit into less space using standard compression such as MPEG2, MPEG4 or 8PSK. The signal is restored to its original quality by the receiver (in theory) with digital signals.

Reducing the bit rate means the signal is reduced in bandwidth before it is compressed so that the compressed signal is even smaller. This reduces the quality of the signal significantly. It is against CRTC policy for a BDU to do this.
 
Our Motorola boxes do the same thing (I'm with Cogeco). You need to set your HD box to 720p or 1080i (for HD channels).
 
Agreed. My understanding is that one transponder has 29 mbps capacity and Bell puts 2 HD channels on each. That allows for something like 12 mbps per HD channel + a little headroom for operational data. Some broadcasters are delivering HD at 19 mbps -- which is why Rogers delivers that rate (and it can given cable technology). In truth, Bell's 12 mbps is "good enough" as some broadcasters deliver at that rate anyway.

To deliver more than 19 mbps is wasteful and serves no purpose whatsoever.

To move to 8 mbps for HD (ie 3 channels per transponder) requires additional compression beyond what the broadcaster delivers.

But I could be wrong.
 
I_Want - although it may be against CRTC policy for BDUs to do this, many of them must to accommodate their bandwidth limitations. I believe that the CRTC policy may also only apply to Canadian TV Stations, therefore they can leave these uncompressed and compress the other stations.

For example, Shaw and Videotron compress some of the stations and don't compress others, by putting 3 channels per QAM for the compressed ones and 2 channels per QAM for uncompressed. This gives only about 13 Mbps to the compressed channels, while leaving up to 19.4 Mbps for the uncompressed ones.

This bitrate reduction is what we're talking about and it affects Cable companies that do this due to bandwidth limitations, as well as Satellite companies, who must also do this due to their bandwidth (bitrate) limitation. I believe that Rogers Ontario is the only company that doesn't compress any HD channels, leaving the full 19.4 Mbps available for all HD stations. (even though the stations themselves broadcast at 13-18 Mbps.)

I'm sure that the satellite companies must have some sort of waiver from the CRTC for this as there is nothing more that they can economically do. Perhaps the CRTC policy only affects cable companies.
 
I believe when they did all the transponder changing and shuffling on nimiq 2 to create more space the hdtv channels were downrezzed to 1280x720. I may be wrong but that's one of the things I heard. I'll have to check into this again.
 
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