4 ms·
Why 1/30th? Latency will be far more than that due to speed of light. My mpeg vision circuits are about 480ms end to end from Washington/New York to London. T
by chgs 2y ago
Why 1/30th?
Latency will be far more than that due to speed of light.
My mpeg vision circuits are about 480ms end to end from Washington/New York to London. The j2k ones are faster but still in the 200ms range. In theory you could get it down to sub 100ms but at that point you are certainly having to engineer your paths correctly and use barely any compression.
Uncompressed 4k is in the 10gbit range. My uhd jxs bitrates are about 1.3gbit but wouldn’t deliver sub 200 across the pond.
- mysecretaccount 2y ago> Why 1/30th? > Latency will be far more than that due to speed of light. 1/30th of 1s is almost exactly the round-trip time from NYC to Dublin (Wolfram Alpha says 17ms one-way).
- anyfoo 2y agoOP is correct, 1/30 s is a good ballpark theoretical lower bound. Assuming travel across the earth surface, light in a vacuum take about 14ms to cross the distances. Times two for round trip that’s about 1/30 s. Of course we don’t have anywhere near ideal conditions there (at a minimum, light in fiber is already slower, closer to 40ms round trip in that case, and of course network infrastructure adds orders of magnitude), but it’s a good limit.
- oceanplexian 2y agoYou don’t need round trip with live video, you can push frames in UDP packets from both sides.
- IncreasePosts 2y agoI was thinking more about the rtt to do something in new york and see the reaction of the person in Dublin, which would probably be the major indicator of latency.