Someone please explain how Voom allocates bandwidth

[Bruce]

It's still not clear. The 80Mbps is mentioned on the descriptor of each original channel. Also, it says that each Music Choice channel has 15Mbps :shocked
Bottom line, we need Rod to come here and explain.

Go to the bottom, it shows this:

0x01d0 (13.92% - 6.71 Mbps) 0x01d0 MPEG-2 Video for program 3
0x01d1 (0.78% ~ 0.38 Mbps) 0x01d1 AC-3 Audio for program 3
0x01e9 (0.04% ~ 0.02 Mbps) 0x01e9 MPEG-2 PMT for program 3
0x0210 (27.06% - 13.05 Mbps) 0x0210 MPEG-2 Video for program 4
0x0211 (0.78% ~ 0.38 Mbps) 0x0211 AC-3 Audio for program 4
0x0229 (0.04% ~ 0.02 Mbps) 0x0229 MPEG-2 PMT for program 4

Program 3 is Monsters, 4 is Worldsport

Then this is Music Choice:

0x07d0 (0.06% ~ 0.03 Mbps) 0x07d0 MPEG-2 Video for program 150
0x07d1 (0.40% - 0.19 Mbps) 0x07d1 AC-3 Audio for program 150
0x07d6 (0.06% ~ 0.03 Mbps) 0x07d6 MPEG-2 Video for program 151
0x07d7 (0.40% - 0.19 Mbps) 0x07d7 AC-3 Audio for program 151
0x07dc (0.06% ~ 0.03 Mbps) 0x07dc MPEG-2 Video for program 152
0x07dd (0.40% - 0.19 Mbps) 0x07dd AC-3 Audio for program 152
0x07e2 (0.06% ~ 0.03 Mbps) 0x07e2 MPEG-2 Video for program 153
0x07e3 (0.40% - 0.19 Mbps) 0x07e3 AC-3 Audio for program 153
0x07e8 (0.06% ~ 0.03 Mbps) 0x07e8 MPEG-2 Video for program 154
0x07e9 (0.40% - 0.19 Mbps) 0x07e9 AC-3 Audio for program 154
0x07ee (0.06% ~ 0.03 Mbps) 0x07ee MPEG-2 Video for program 155
0x07ef (0.40% - 0.19 Mbps) 0x07ef AC-3 Audio for program 155
0x07f4 (0.06% ~ 0.03 Mbps) 0x07f4 MPEG-2 Video for program 156
0x07f5 (0.40% - 0.19 Mbps) 0x07f5 AC-3 Audio for program 156
0x07fa (0.06% ~ 0.03 Mbps) 0x07fa MPEG-2 Video for program 157
0x07fb (0.40% - 0.19 Mbps) 0x07fb AC-3 Audio for program 157
0x0800 (0.06% ~ 0.03 Mbps) 0x0800 MPEG-2 Video for program 158
0x0801 (0.40% - 0.19 Mbps) 0x0801 AC-3 Audio for program 158
0x0806 (0.06% ~ 0.03 Mbps) 0x0806 MPEG-2 Video for program 159
0x0807 (0.40% - 0.19 Mbps) 0x0807 AC-3 Audio for program 159
0x080c (0.06% ~ 0.03 Mbps) 0x080c MPEG-2 Video for program 160
0x080d (0.40% - 0.19 Mbps) 0x080d AC-3 Audio for program 160
0x0812 (0.16% ~ 0.08 Mbps) 0x0812 MPEG-2 Video for program 161
0x0813 (0.40% - 0.19 Mbps) 0x0813 AC-3 Audio for program 161
0x0818 (0.06% ~ 0.03 Mbps) 0x0818 MPEG-2 Video for program 162
0x0819 (0.40% - 0.19 Mbps) 0x0819 AC-3 Audio for program 162
0x081e (0.06% ~ 0.03 Mbps) 0x081e MPEG-2 Video for program 163
0x081f (0.40% - 0.19 Mbps) 0x081f AC-3 Audio for program 163
0x0824 (0.06% ~ 0.03 Mbps) 0x0824 MPEG-2 Video for program 164
0x0825 (0.40% - 0.19 Mbps) 0x0825 AC-3 Audio for program 164
0x082a (0.06% ~ 0.03 Mbps) 0x082a MPEG-2 Video for program 165
0x082b (0.40% - 0.19 Mbps) 0x082b AC-3 Audio for program 165
0x0830 (0.06% ~ 0.03 Mbps) 0x0830 MPEG-2 Video for program 166
0x0831 (0.40% - 0.19 Mbps) 0x0831 AC-3 Audio for program 166
0x0836 (0.06% ~ 0.03 Mbps) 0x0836 MPEG-2 Video for program 167
0x0837 (0.40% - 0.19 Mbps) 0x0837 AC-3 Audio for program 167
0x083c (0.06% ~ 0.03 Mbps) 0x083c MPEG-2 Video for program 168
0x083d (0.40% - 0.19 Mbps) 0x083d AC-3 Audio for program 168
0x0842 (0.06% ~ 0.03 Mbps) 0x0842 MPEG-2 Video for program 169
0x0843 (0.40% - 0.19 Mbps) 0x0843 AC-3 Audio for program 169
0x0848 (0.18% ~ 0.09 Mbps) 0x0848 MPEG-2 Video for program 170
0x0849 (0.40% - 0.19 Mbps) 0x0849 AC-3 Audio for program 170
0x084e (0.06% ~ 0.03 Mbps) 0x084e MPEG-2 Video for program 171
0x084f (0.40% - 0.19 Mbps) 0x084f AC-3 Audio for program 171
0x0854 (0.06% ~ 0.03 Mbps) 0x0854 MPEG-2 Video for program 172
0x0855 (0.40% - 0.19 Mbps) 0x0855 AC-3 Audio for program 172
0x0be9 (0.01% ~ 0.01 Mbps) 0x0be9 MPEG-2 PMT for program 172

 

[marty2112]

Those numbers mean nothing...

 

[Bruce]

Those numbers mean nothing...

Why?

 

[marty2112]

Like Sean says, they are variable.. You will get different numbers everytime you check. The encoders takes what it needs when it needs it.

 

[Sean Mota]

Marty2112,

how about the 1440x1080i resolution is that the resolution on the HD Channels?

 

[hongcho]

Still, I wouldn't say "nothing".

Hong.

 

[Bruce]

Like Sean says, they are variable.. You will get different numbers everytime you check. The encoders takes what it needs when it needs it.

I know that as I said in above post.
I think the biggest point is the 1440 x 1080i resolution.

 

[marty2112]

They"re a snapshot of a single moment. We try to always have good numbers up there!
Its the overall quality of the entire transponder that is important. Getting all the channels to look as good as possible with the available bandwidth!
Wouldnt you agree?

 

[Bruce]

They"re a snapshot of a single moment. We try to always have good numbers up there!
Its the overall quality of the entire transponder that is important. Getting all the channels to look as good as possible with the available bandwidth!
Wouldnt you agree?

But again, what about the 1920 x 1080i channels being 1440x 1080i, are all HD channels ( like HBO ) that way, and then what about the 720P channels like ESPN?

 

[marty2112]

Does HBO or ESPN HD look bad to you?

 

[Bruce]

Does HBO or ESPN HD look bad to you?

Only when it is not OAR, and for ESPN looks fine when they show HD.
And before you Voomers flame me, my Step-Father has it now ( Voom ), he asked me what the best source was for more HD and I told him Voom, so he got it.

 

[marty2112]

What? Don't you love the ESPN HD Pillars???

 

[Sean Mota]

Only when it is not OAR, and for ESPN looks fine when they show HD.
And before you Voomers flame me, my Step-Father has it now ( Voom ), he asked me what the best source was for more HD and I told him Voom, so he got it.

I watched a bunch movies on HBO that are 16x9 including Carnivale last night and it looked fine (Comparing to Dish HBO a few months ago. I do not have HBO on dish anymore to make a comparison).

 

[Bruce]

I watched a bunch movies on HBO that are 16x9 including Carnivale last night and it looked fine (Comparing to Dish HBO a few months ago. I do not have HBO on dish anymore to make a comparison).

Don't have E* anymore, have Comcast,( had to have HD-DVR) and HD looks a little better, Ken H at AVS said Comcast in our area does not compress HD at all.

 

[marty2112]

Not compressed? Thats impressive. Thats a lot of bandwidth (1.5Gb) to send!!

 

[Bruce]

Not compressed? Thats impressive. Thats a lot of bandwidth (1.5Gb) to send!!

Talk to Ken, I think at one time someone posted 19.3 or something like that.

 

[ripit]

Like Sean says, they are variable.. You will get different numbers everytime you check. The encoders takes what it needs when it needs it.

This is similar to a car with an onboard computer that calculates fuel mileage. There is the instant and average readout. The instant reading is pretty much useless. And the average does not mean that you never get mileage that is better than that number, but that taking into account peak usage and times when you are coasting, this is the amount of gas that you use on average over time. At any given time the intant reading will either higher or lower than the average depending on whether you are accelerating, coasting, going uphill or downhill, etc.

 

[Rod]

80 MBps is typical for an HD encoder running in VBR mode - for SD channels you'd see 15 Mbps, i.e. the max per profile. The PID rate chart is much better to see the average bitrate for the video streams.

Edited to add that the rates in the PID chart are based on the PCR of a given channel (so very accurate) and are averaged over the runtime of TSReader in the particular session.

Rod

 

[Walter L.]

Hi Rod:
Welcome back to this forum. Thanks for the clarification. Some additional questions I have are:

1) How do you get access to the VOOM signal (hardware)?
2) Are the VOOM-exclusive channel non-encrypted (it looks so from your screenshots)?
3) What HD channels are 1440 x 1080i (instead of 1920 x 1080i)? All?

 

[Rod]

1) How do you get access to the VOOM signal (hardware)?
2) Are the VOOM-exclusive channel non-encrypted (it looks so from your screenshots)?
3) What HD channels are 1440 x 1080i (instead of 1920 x 1080i)? All?

1. I built an interface that uses a USB 2.0 microcontroller and interfaces to a Dish Network 6000 8PSK module. This contains a BCM4500 demodulator which is what Voom uses for their STBs so I can lock Voom and bring the transport stream into TSReader.

2. Don't know - I'm not a subscriber. They've had channels switch back between scrambled and unscrambled many times since they've been operational. No doubt some encoder/CA issue.

3. No idea - I can't tell you about channels that are scrambled since I don't have a subscription to Voom.

Rod