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[liberationtech] Why Skype (real-time) is losing out to WeChat (async)

Nadim Kobeissi nadim at nadim.cc
Thu Dec 27 07:06:10 PST 2012


On Thu, Dec 27, 2012 at 4:20 PM, Nathan of Guardian <
nathan at guardianproject.info> wrote:

> On 12/27/2012 06:29 PM, David Gessel wrote:
> > A minor semantic quibble, but "push-to-talk(1)" is "walkie talkie" mode
> that typically implies "live," "instant," and "synchronous" communications
> with the caveat that it is historically half duplex which remains useful in
> high-noise situations.
> >
> > "Push Voice" would imply push notifications indicating the availability
> of stored audio files probably containing voice data (voice store and
> forward (2)).
> I am definitely talking about Push-to-Talk.
>
> What is interesting about the shift from VoIP to Push-to-talk is that
> half duplex over TCP (PTT) is insanely easier to implement than full
> duplex over UDP (VoIP).
>

>From Cryptocat's perspective this is also true.


>
> Best,
>  Nathan
>
> --
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