ubuntu-phone team mailing list archive

[Jouni Helminen <jouni.helminen@xxxxxxxxxxxxx>]

Would be great to have OS level integration for voip. I would look at Opus
as the codec - it's great. I think latest version of Mumble and WebRTC both
use Opus?

On Mon, Jul 20, 2015 at 12:15 PM, Craig Harper <dexteruk75@xxxxxxxxx> wrote:

> Hi Everyone
>
> I would like to start a discussion on VoIP and Ubuntu Touch Phones.
>
> I have been in the VOIP industry for many many years, and there is always
> common problems with VoIP most of which can be other come one way or
> another.  But when it comes to mobile devices we have a few more thing to
> take into consideration and this can only be done from the Operating System
> rather than a applications.
>
> So I would like to contribute some ideas and start a discussion about
> VoIPs future on the Ubuntu Touch platform.
>
>
> Quality
>
> Today we have more and more bandwidth available so its not an issue its
> really a question of priority.  Just like when you make or receive a call,
> your GMS has priority over your speaker.  When you make or receive a VoIP
> call your call should have priority over your data, simple things can be
> done to allow this to happen through API to suspend other applications data
> for example downloads, there is no point in downloading updates when your
> on the phone call, or downloading emails.  This could be the greatest
> benefit.
>
> Native VOIP over VOIP Application
>
> I will say here, Native VOIP is always the way to go, it can have more
> integration with Operating System, it could be accessed by many
> applications and the benefits of things being open source the collective
> efforts can be focused on making the perfect VoIP experience, rather than
> lots of apps not quite making the mark, because they don't have the
> integration with the OS needed to provide quality.
>
> Echo Cancellation
>
> This is a must have to be build into any VoIP Client, Android also have a
> Native VoIP Client (Great Idea) but still today no Echo Cancellation even
> after so many years.  (I wonder if GSM companies have any influence over
> this)
>
> NAT (Network Address Translation)
>
> One of the biggest problems we have today and foreseeable future is
> Network Address Translation this has come along way over the years and VOIP
> networks have become better at handling the issues, but making sure the
> VOIP Client has STUN/ICE support will allow calls work in most network
> topologies.
>
> Codec Support
>
> This part i know this is a more of a complicated issue, as there is a
> world of difference licenses, there are now open source version, codecs are
> so important to help reduce quality issues, the smaller your packets the
> easier they are going to reach there destination uninterrupted.  Two of the
> most commonly used these days are g729 and g722, with g729 using a little
> as 9K and g722 using 14K but give providing wider bandwidth sound give us
> HD quality.
>
>
> Thanks for your time
>
>
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