Re: [103attendees] A/V in Bangkok (was: Re: [Thanks, Bangkok !)

Toerless Eckert <tte@cs.fau.de> Sun, 11 November 2018 09:53 UTC

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Date: Sun, 11 Nov 2018 10:52:53 +0100
From: Toerless Eckert <tte@cs.fau.de>
To: Carsten Bormann <cabo@tzi.org>
Cc: Mikael Abrahamsson <swmike@swm.pp.se>, John C Klensin <john-ietf@jck.com>, 103attendees@ietf.org, Michael Richardson <mcr@sandelman.ca>
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Subject: Re: [103attendees] A/V in Bangkok (was: Re: [Thanks, Bangkok !)
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Carsten: The main issue is really the playout length supported
by the conference room echo cancellation systems. The remote
side echo can have as much as > 200 msec rtt and i have not
seen systems supporting tis well except dedicated ones built
for that purpose. Might be related to the DSP cost which may
go up with rtt you want to support, not quite sure about the
algo's

Ideally nowadays this should be taken care of by CPU within
meetecho itself if thats really whats used as the channel to connect
room with remote participant. Not sure if meetecho itself does
echo cancellation.

Cheers
    Toerless

On Sun, Nov 11, 2018 at 03:07:36PM +0700, Carsten Bormann wrote:
> On Nov 11, 2018, at 14:02, Mikael Abrahamsson <swmike@swm.pp.se>; wrote:
> > 
> > But +100000 on not using the built in laptop mic or even worse, not wearing headset at all. Echo or feedback is really annoying, and the biggest problem is that it doesn't affect the person causing it.
> 
> That was good advice some 3 to 4 years ago.
> 
> But today local echo compensation has become so good that a headset often no longer is necessary.
> 
> Of course the conferencing system has to support echo compensation, and the audio hardware in the laptop has to be decent.
> 
> (Having some EarPods as a backup is always good, though.)
> 
> Grüße, Carsten
> 
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