net neutrality and peering wars continue

Neil Harris neil at tonal.clara.co.uk
Sat Jun 22 19:06:25 UTC 2013


On 22/06/13 16:34, Owen DeLong wrote:
>>> That's easily solved by padding the ACK to 1500 bytes as well.
>>>
>>> Matt
>>>
>> Or indeed by the media player sending large amounts of traffic back to the CDN via auxiliary HTTP POST requests?
>>
>> Neil
>>
>>
>>
> That would assume that the client has symmetrical upstream bandwidth over which to send such datagrams. At least in the US, that is the exception, not the rule.
>
> Owen
>
>

Hi Owen,

You only need to match the video stream bandwidth, not the full download 
speed of the link.

Given that current multicore CPUs are now fast enough to decode HEVC in 
software, and with HEVC being roughly twice as efficient as H.264, that 
means you should be able to do quite decent full HDTV quality video with 
an average bandwdith of about 5 Mbps, given sufficient buffering to 
smooth out the traffic. Less, if you're willing to compromise on picture 
quality a bit, and go for, say, 720p.

So, given an HEVC-capable decoder, this strategy should work for any 
connection with an upstream speed of better than about 4 to 5 Mbps, 
which is becoming more and more common on cable Internet service, as 
DOCSIS 3.0 is rolled out and faster links become more common,

Neil







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