[asterisk-dev] Simulation of radios with something like MeetMe()

Steven S. Critchfield critch at basesys.com
Wed Jan 9 10:39:17 CST 2008

----- "Holger Wirtz" <wirtz at dfn.de> wrote:
> Hi,
> I hope this is not too much OT. I am currently working on a
> simualtion
> of radio equipment for the open sorce flightsimualtor FlightGear. It
> works with Asterisk and the client is based on iaxclient (see
> http://wiki.flightgear.org/flightgear_wiki/index.php?title=FGCOM)
> Actually it works but there are some problems. For more realistic
> radios
> there should be an application like app_meetme with more features:
> For the outgoing audio stream to each client there has to be a mixup
> of
> the stream based on the distance between the partners. I know that
> this
> would use more cpu cycles than the normal conference.
> But the real problem is:
> how do I get the coords of the plane from the client to the Asterisk
> application? My idea was to send them once or twice a minute with a
> SendText() on the channel.
> Now my questions:
> - Can this be realized with an advanced app_meetme?
> - Is it possible to work with text informations in an application
> like
>   app_meetme?

While thinking about this, meetme would probably be the wrong application
to host this. Specifically, as I understand it, meetme currently creates
one mix audio stream and then distributes this to the various parties.
What you need is a different stream per user mixed based on relative
distances. Also the need to be able to wipe certain signals out as they 
are overpowered b y closer strong signals.

I think what you need is going to be a fairly complex problem and well
beyond usefull in the telephony world where we want to make this all the
best quality sound possible.

You also might want to consider how realistic you want your radio
simulator to work. For instance, if you are flying below the peak of a
mountain range, your quality over the range is going to be affected by
where your receiver is and what kind of signal bounces you might get.
Steven Critchfield critch at basesys.com
-------------- next part --------------
An embedded message was scrubbed...
From: Holger Wirtz <wirtz at dfn.de>
Subject: [asterisk-dev] Simulation of radios with something like MeetMe()
Date: Wed, 9 Jan 2008 15:30:01 +0100
Size: 5612
Url: http://lists.digium.com/pipermail/asterisk-dev/attachments/20080109/739fb323/attachment-0001.eml 

More information about the asterisk-dev mailing list