[Blink] New Blink Qt release 0.4.0 for Windows

[mgraves at mstvp.com]

> -------- Original Message --------
> Subject: Re: [Blink] New Blink Qt release 0.4.0 for Windows
> From: Adrian Georgescu <ag at ag-projects.com>
> Date: Fri, June 28, 2013 3:11 pm
> To: Emil Ivov <emcho at jitsi.org>
> Cc: Blink Support Forum <blink at lists.ag-projects.com>
> 
> 
> 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.
> 
> Adrian

Many people will implement the codec very quickly, without making any
effort to re-architect for its capabilities. This is an example of that
kind of quick-and-dirty implementation. 

There's nothing fundamentally wrong with it if your intended application
is voice.However, Opus can do much more....given the effort.

I've called into a Freeswitch conference server with end-points running
Opus at 48 KHz and passed full bandwidth music across the link. It
sounded better than Pandora, although not in stereo....yet.

 
> 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.
> > 
> > Cheers,
> > Emil
> > 
> > 
> > 
> > -- 
> > https://jitsi.org
> > 
> 
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