My Sling never trasnfers data at more tha 4mbit, even when on my local network. IIRC the max bandwidth of a satellite transponder is in the 50mbit range, and all channels are way less than that. An ATSC channel is at max 19.8mbit. In other words, USB2 is more than enough to move two video streams. The problems arise from CPU bottlenecks in the 722.
Well the other side of this.. is the compression/decompression codecs used. Even though 4Mbit is all you saw from the sling box, was the quality as good or better than the SlingAdapter? and is the amount of data moved comprable?
Case in point ... I've a copy of Katy Perry's "Firework" video (youtube), its 1080p and just 7 second shy of 4 minutes. Its 94 megs. ... So lets assume 4mins = 100 meg .... or 25 megs per minute.
If we took a one hour video .... 25 M/m x 60 min = 1.5 G (approx)
the average of some of my DVR events moved to external hard drive go from 1.x gigs to 2.3 gigs
So maybe dish's downlink on any given channel is at about that rate 25meg/min ... then why isn't Dish's 1080i as clear, and why isn't its data moved as efficiently from the box in the next room, as that 1080p video from Youtube?
A quick live-stream test I got this...
Mon Feb 28 14:05:32 UTC 2011
Mon Feb 28 14:09:50 UTC 2011
RX bytes:451909504 (430.9 MiB) TX bytes:3187298936 (2.9 GiB)
RX bytes:728595913 (694.8 MiB) TX bytes:3193328354 (2.9 GiB)
Bytes: 277,505,409
Time : 4m 18s // 258sec
Approx: 64 MBytes / Min ...
This is nearly THREE times the amount of data moved from Youtube and Youtube's video is 1080p while the live video is from the "better" setting on the dish player app which I'd say is fairly high, but not 1080p, and if you can hear the "warble" in the audio at times, you know there must be something not so great in the video stream but the human eye can't detect it as easily as the ear does the audio.
I'm sure there's overhead, but not 3 times as much, and certainly not so that there would be 3 times as much data. After having run that test ... I'm convinced that Dish's codecs are just sh*t and that if they'd apply their resources in the right direction they'd probably half their amount of required transponders, saving them money, and by chance being able to offer more value (more channel space, less drive space waste on a DVR, etc)