Does NVR "incoming bandwidth" specs measure recording or encoding performance?

[Wayne Lewis]

I want to record 8-10 cams at 1080p to 4k simultaneously and economically.

I'm looking at the HIKVision units and there are a few in particular I'm interested in -- two of the 7600-series and two of the 7700 series. There are a handful of differences, of course, but most notable is "incoming bandwidth".

Specifically, I'm looking at:
DS-7616NI-I2 -- http://www.hikvision.com/en/Products_accessries_212_i5728.html
DS-7608NI-I2 -- same url as above
DS-7732NI-I4 -- http://www.hikvision.com/en/Products_accessries_214_i5727.html
DS-7716NI-I4 -- same url as above

Is the incoming bandwidth a measure so to speak of the amount of data the NVR can capture simultaneously?

So, although I will run 10 cameras or less to start, if I purchase a unit capable of handling 256Mbps of bandwidth incoming, I will MORE encoding headroom to save higher quality video?

The bandwidth of each of the units is:
DS-7616NI-I2 -- 160Mbps incoming, 256Mbps outgoing
DS-7608NI-I2 -- 80Mbps incoming, 256Mbps outgoing
DS-7732NI-I4 -- 160Mbps incoming, 256Mbps outgoing
DS-7716NI-I4 -- 256Mbps incoming, 256Mbps outgoing

The decoding across all the units is 4-ch @ 8MP, 16-ch @ 1080P, but I'm going to be look at the streams all on the same monitor, so that seems like a non factor.

The stats are all so confusing, it's hard to understand how to nail down the types of units I should be looking for. Thanks!

[TD="class: td2, align: left"]4-ch@8MP,16-ch@1080P[/TD]

 

[spencers]

Wondering the same thing. Anyone know?

 

[Dutchie30]

I'd indeed think it's the amount of data the NVR can capture simultaneaously, but only in a worst-case scenario. Say you hook up 8 cams to the DS-7608NI-I2, the total incoming bitrate across all cams can only be 80Mbps.

Same goes for the decoding. It can simply do 32MP decoding at the same time (4ch@8MP or 16ch@2MP(1080p)).

If I had to guess anything >= 160Mbps incoming will do just fine for your 8-10ch@8MP(4k) needs. In this case it's simply the choice between 2 or 4 harddrives installed (I2 = 2 drives, I4 = 4 drives).

 

[bob332]

I was wondering the same thing and found this website - do not know how accurate it is but one would think it should be accurate since you have known amounts of data.

Good luck,
Bob