[Blink] New Blink Qt release 0.4.0 for Windows
ag at ag-projects.com
Fri Jun 28 22:11:34 CEST 2013
One that I know of is csipsimple on Android, it operates internally at 16kHz and there is no audible difference when using OPUS because of this reason.
On Jun 28, 2013, at 10:08 PM, Emil Ivov <emcho at jitsi.org> wrote:
> On 28.06.13, 21:45, Adrian Georgescu wrote:
>> That is because even if OPUS codec can use internally 48KHz sample rate
>> that covers most human audible spectrum, the softphone you have used
>> employs a smaller sampling rate like 8 or 16kHz, which renders the OPUS
>> codec advantages useless, so you cannot hear any difference compared
>> with let's say G722. Unless the whole audio processing chain works at
>> the codec speed speed, the codec performance will not be visible.
> Interesting. I don't think I've ever come across a softphone that does such a thing. Do you have a specific implementation in mind? Is this the one that MCG was referring to?
> MCG, picking a default bitrate is not a simple matter, which is why many implementations allow you to play with it. You may want to try this.
> Some could potentially be adapting it based on RTCP feedback but I don't think any of the current Opus supporting applications do this.
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