Well ... if * is transcoding, then * is an end point and it may generate the 729 SID packets. In pass through mode, there's nothing to do :)
Here's a link for computing IP bandwidth for different codecs: http://www.bandcalc.com/ For the 729 codec, the saving is not that big and voice quality is better without VAD/silence suppression. Regards, Ovidiu Sas On 1/19/07, Mike Ashton <[EMAIL PROTECTED]> wrote:
Nishith , I believe that the endpoints have to support it and have it enabled. It's a function of the RTP stream timestamps (http://www.voip-info.org/tiki-index.php?page=RTP+Silence+Suppression), the endpoint supporting the option and also enabling the option. Asterisk will just pass it through or transcode what it gets. I guess in theory you could write a transcoder that during the transcode would analyze the stream and suppress the silence packets, but then you would have to add some buffering and added computation time for the transcode which would introduce more latency to the conversation. Mike > Nishith Patel wrote: > >> Can any body tell me about VAD " Voice Activity Detection" in >> asterisk. > > Asterisk doesn't support VAD... > > -- > > Best regards, > Duane > > http://www.cacert.org - Free Security Certificates > http://www.nodedb.com - Think globally, network locally > http://www.sydneywireless.com - Telecommunications Freedom > http://e164.org - Because e164.arpa is a tax on VoIP > > "In the long run the pessimist may be proved right, > but the optimist has a better time on the trip." > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
