One problem with that theory. At 40ms you have more samples per packet making it more difficult for a PLC algorithm to interpolate . Bigger chunks of audio are now missing.
Sent from my iPhone > On Jun 9, 2014, at 9:45 PM, "Mark R Lindsey, ECG" <lind...@e-c-group.com> > wrote: > > > > >> On Mon, Jun 9, 2014 at 4:14 PM, Alex Balashov <abalas...@evaristesys.com> >> wrote: >>> On 06/09/2014 02:50 PM, Mark R Lindsey wrote: >>> 2. Increase the ptime from 20 ms to 30-40 ms to reduce packet-drop exposure >> >> Or does this thesis lean on countervailing tendencies, such as overall >> reduced PPS in a higher ptime scenario? > > You're on the right track with ptime. The theory idea is that: > > (A) Most packet loss is due to congestion > > (B) When congestion occurs the router selects a packet to drop > > (C) The routers pick a packet to discard more-or-less at random > > (D) Therefore, A 180 byte packet is just as likely to be dropped as a 1500 > byte packet. > > (E) A ptime=20 generates twice the packets as ptime=40, and therefore > ptime=20 has twice the exposure to the discards > > (F) You can reduce your exposure to discards by reducing the number of > packets you have in the queue. > > (G) Reduced discards mean better audio quality. > > _______________________________________________ > VoiceOps mailing list > VoiceOps@voiceops.org > https://puck.nether.net/mailman/listinfo/voiceops
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