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RE: [Linphone-developers] Playback rate

From: M Walton
Subject: RE: [Linphone-developers] Playback rate
Date: Mon, 29 Mar 2010 09:57:22 +0100


Many thanks for the replies

I made a typo in the previous mail

I meant to say - reduce the sample rate to 7980Hz not 7080!!! so its
just a tweak really

I seem to get about 4 seconds of great speech followed by a little pop!

I like the sound of packet loss concealment - will look into that, it
seems my problem is coming from oscillator slack on the embedded part of
the system

Kindest regards


-----Original Message-----
From: Steve Strobel [mailto:address@hidden 
Sent: 26 March 2010 7:32 PM
To: M Walton; address@hidden
Subject: Re: [Linphone-developers] Playback rate

>What i would like to do, is monitor the buffer, so if it gets too 
>low, i can slow down linphones 8K sample rate to say 7080Hz, thus 
>allowing me to slowly replenish the buffer - and vice versa.

If you do that, whatever is receiving the data from Linphone will run 
short on data.  Unless it has packet loss concealment, it will pop 
just like you are hearing now.  In other words, I think your idea 
would just move the problem from one place to another.

>Billy Walton


Steve Strobel
Link Communications, Inc.
1035 Cerise Rd
Billings, MT 59101-7378
(406) 245-5002 ext 102
(406) 245-4889 (fax)

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