From d2f22c57fea57aa556b60ebf98c32a4a3285a0c0 Mon Sep 17 00:00:00 2001 From: Mark Spencer Date: Thu, 1 Jul 2004 21:55:06 +0000 Subject: Merge Steven Davies latest jitter buffer patch git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3373 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- configs/iax.conf.sample | 51 ++++++++++++++++++++++++++++++++++++------------- 1 file changed, 38 insertions(+), 13 deletions(-) (limited to 'configs') diff --git a/configs/iax.conf.sample b/configs/iax.conf.sample index 2ff335883..ec68a3eb7 100755 --- a/configs/iax.conf.sample +++ b/configs/iax.conf.sample @@ -51,21 +51,46 @@ bandwidth=low disallow=lpc10 ; Icky sound quality... Mr. Roboto. ;allow=gsm ; Always allow GSM, it's cool :) ; -; You can also adjust several parameters relating to the jitter -; buffer. Specifically, you can provide a maximum jitter buffer, -; you can turn it off entirely, and you can specify an acceptable -; drop rate (per MEMORY_SIZE, by default 3 of 100). Disabling the -; jitter buffer is generally recommended unless you are on a highly -; jittery network, since usually jitter buffering will cause you additional -; latency. Finally, you can specify the maximum -; excess jitter buffer, which if exceeded, causes the jitter buffer to -; slowly shrink in order to improve latency. -; + +; You can adjust several parameters relating to the jitter buffer. +; The jitter buffer's function is to compensate for varying +; network delay. +; All the jitter buffer settings except dropcount are in milliseconds. +; The jitter buffer works for INCOMING audio - the outbound audio +; will be dejittered by the jitter buffer at the other end. +; +; jitterbuffer=yes|no: whether you want the jitter buffer at all. +; dropcount: the jitter buffer is sized such that no more than "dropcount" +; frames would have been "too late" over the last 2 seconds. +; Set to a small number. "3" represents 1.5% of frames dropped +; +; maxjitterbuffer: a maximum size for the jitter buffer. +; Setting a reasonable maximum here will prevent the call delay +; from rising to silly values in extreme situations. +; +; maxexcessbuffer: If conditions improve after a period of high jitter, +; the jitter buffer can end up bigger than necessary. If it ends up +; more than "maxexcessbuffer" bigger than needed, Asterisk will start +; gradually decreasing the amount of jitter buffering. +; +; minexcessbuffer: Sets a desired mimimum amount of headroom in +; the jitter buffer. If Asterisk has less headroom than this, then +; it will start gradually increasing the amount of jitter buffering. +; +; jittershrinkrate: when the jitter buffer is being gradually shrunk +; (or enlarged), how many millisecs shall we take off per 20ms frame +; received? Use a small number, or you will be able to hear it +; changing. An example: if you set this to 2, then the jitter buffer +; size will change by 100 millisec per second. + jitterbuffer=no -;dropcount=3 +;dropcount=2 ;maxjitterbuffer=500 -;maxexcessbuffer=100 -; +;maxexcessbuffer=80 +;maxexcessbuffer=80 +;jittershrinkrate=1 + + ;trunkfreq=20 ; How frequently to send trunk msgs (in ms) ; ; -- cgit v1.2.3