Improved networking

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mcglynnj
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Improved networking

Post by mcglynnj »

I would love to see improved networking on upcoming/successor models.

At present, models only go up to 100Mbps, which may prove prohibitive in the future. I would love to see the use of SFP 1/10G cages on models with higher tuning capacity (to reduce network latency).

It would be nice to have the capability of limiting how device management consoles can be accessed; for example, devices have two network ports, one where both configuration and tuners can be accessed, the other tuners-only.

NedS
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Re: Improved networking

Post by NedS »

Realistically, that would only matter if we put more tuners in a unit. We haven't been able to find an example in-the-wild where all four tuners being used at once would max out the 100 meg interface.

EricHD
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Re: Improved networking

Post by EricHD »

Out of curiosity, how much bandwidth does each channel use on average (at 480, 720, 1080 or 4k)?

Eric

scyto
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Re: Improved networking

Post by scyto »

NedS wrote: Fri Sep 18, 2020 1:35 pm Realistically, that would only matter if we put more tuners in a unit. We haven't been able to find an example in-the-wild where all four tuners being used at once would max out the 100 meg interface.
what if multiple users were accessing the 4 tuners?
just asking from an academic perspective - for example 8 users accessing 4 tuners where each pair of users want the same channel)

(hmm i assumed, maybe wrongly, that if two users access the same channel they share the same tuner?)

NedS
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Re: Improved networking

Post by NedS »

scyto wrote: Mon Oct 12, 2020 5:17 pm
NedS wrote: Fri Sep 18, 2020 1:35 pm Realistically, that would only matter if we put more tuners in a unit. We haven't been able to find an example in-the-wild where all four tuners being used at once would max out the 100 meg interface.
what if multiple users were accessing the 4 tuners?
just asking from an academic perspective - for example 8 users accessing 4 tuners where each pair of users want the same channel)

(hmm i assumed, maybe wrongly, that if two users access the same channel they share the same tuner?)
Each viewer would get one tuner, at least when using the HDHomeRun app and not using the DVR software (the DVR software, even without a subscription, will enable free tuner sharing).

scyto
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Re: Improved networking

Post by scyto »

NedS wrote: Mon Oct 12, 2020 7:29 pm
scyto wrote: Mon Oct 12, 2020 5:17 pm
NedS wrote: Fri Sep 18, 2020 1:35 pm Realistically, that would only matter if we put more tuners in a unit. We haven't been able to find an example in-the-wild where all four tuners being used at once would max out the 100 meg interface.
what if multiple users were accessing the 4 tuners?
just asking from an academic perspective - for example 8 users accessing 4 tuners where each pair of users want the same channel)

(hmm i assumed, maybe wrongly, that if two users access the same channel they share the same tuner?)
Each viewer would get one tuner, at least when using the HDHomeRun app and not using the DVR software (the DVR software, even without a subscription, will enable free tuner sharing).
Thanks Ned, that prompted me to go look at the servio - that only has 100mb port too - that seems to be an issue if i think about 4k streams - imagine recording 4 streams and serving 4+ devices with different pre-recorded 4k content in the house. Heck 100 Mbps isn't enough for 4 in 4 out on ATSC1. Am I missing something here?

Now i don't expect that to impact me (only two people in the house) but I can see a bunch of scenarios where it would.

NedS
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Re: Improved networking

Post by NedS »

scyto wrote: Tue Oct 13, 2020 5:49 pm Thanks Ned, that prompted me to go look at the servio - that only has 100mb port too - that seems to be an issue if i think about 4k streams - imagine recording 4 streams and serving 4+ devices with different pre-recorded 4k content in the house. Heck 100 Mbps isn't enough for 4 in 4 out on ATSC1. Am I missing something here?

Now i don't expect that to impact me (only two people in the house) but I can see a bunch of scenarios where it would.
100 meg ethernet is enough for 6 in/4out at the same time on the SERVIO when using ATSC 1.0.

We don't have enough real world data to know what common bitrates for ATSC 3.0 at 4k will be, as most broadcasters have only done basic demos in 4k, and most content is still in 720/1080. At 1080 and below, the data streams are actually smaller than ATSC 1.0.

scyto
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Re: Improved networking

Post by scyto »

NedS wrote: Tue Oct 13, 2020 6:24 pm
scyto wrote: Tue Oct 13, 2020 5:49 pm Thanks Ned, that prompted me to go look at the servio - that only has 100mb port too - that seems to be an issue if i think about 4k streams - imagine recording 4 streams and serving 4+ devices with different pre-recorded 4k content in the house. Heck 100 Mbps isn't enough for 4 in 4 out on ATSC1. Am I missing something here?

Now i don't expect that to impact me (only two people in the house) but I can see a bunch of scenarios where it would.
100 meg ethernet is enough for 6 in/4out at the same time on the SERVIO when using ATSC 1.0.

We don't have enough real world data to know what common bitrates for ATSC 3.0 at 4k will be, as most broadcasters have only done basic demos in 4k, and most content is still in 720/1080. At 1080 and below, the data streams are actually smaller than ATSC 1.0.
sorry to be that guy - how? on my tuner stats using the gui app i am seeing average of 15mbps per stream on the HD channels. Is the bandwidth wrong?

NedS
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Re: Improved networking

Post by NedS »

6in/4out is what the company figured would be a safe default for most people for an average situation (which might be all HD, but also might occasionally include an SD channel, etc). It's entirely possible to max out before that with multiple high bitrate channels, though. I think ATSC 1.0 allows around 19 megs max. In Tucson most of the HD channels seem to be around 10, some above, some below. I tried to find some averages for other places, and the country, but it's hard to find any good sources. I'm sure Nick has better numbers than I on this.

All of that being said, you do make a fair point, that a server-type application like the SERVIO would be the best candidate for us to go to a higher network interface. I still think the tuners are safe with 100 meg interfaces, and that the SERVIO does well for an entry-level storage device that is turn-key. The biggest motivator for us to do DVR hardware was to have something people could just plug in and have work out of the box. We figure that the existing NAS market could cover the power users, but that's not to say that we haven't thought about doing a more "beefy" server-type box.

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