Re: [codec] #3: 2.2. Conferencing: Support of binaural audio?

["Christian Hoene" <[e-mail]>]

Hi Slava,

>I agree 100% that the conference should be stereo, however, I am not sure that CODEC should solve еры
>positioning task.

No, this is not the task of the codec but the conferencing application

>There are other ways like sending the spatial position toward the client and let the client-side to
>the positioning job.
>(remember, that in today's conference, like H.264SVC, assume that each participant MAY HAVE DIFFERENT
>LAYOUT of participants on the screen, therefore, spatial position can be different for different
>listeners).
>So its not probably wise to mix in stereo on the server...

Actually, here are two ways of implementing:
a) Mixing all streams at all clients (requires N clients to N clients mono distribution).
b) Mixing at a central conferencing server (requires N clients to 1 server (mono) and 1 server to N clients (stereo) distribution)

Currently, I do not understand, why (b) is unwise. 

(a) does not have any impact on the requirements but in case of (b) codec requirements are the support of stereo speech transmission and support for efficient mixing.

With best regards,
 Christian

>
>Slava Borilin
>
>
>-----Original Message-----
>From: [e-mail] [mailto:[e-mail]] On Behalf Of codec issue tracker
>Sent: Tuesday, March 23, 2010 8:33 PM
>To: [e-mail]
>Cc: [e-mail]
>Subject: [codec] #3: 2.2. Conferencing: Support of binaural audio?
>
>#3: 2.2.  Conferencing: Support of binaural audio?
>------------------------------------+---------------------------------------
> Reporter:  hoene@…                 |       Owner:
>     Type:  enhancement             |      Status:  new
> Priority:  major                   |   Milestone:
>Component:  requirements            |     Version:
> Severity:  -                       |    Keywords:
>------------------------------------+---------------------------------------
> The mono mixing in teleconferences is somewhat technically outdated. It
> would make more sense to state the requirements for stereo mixing, which
> greatly helps to quality of teleconferencing.
> Then, if participants are placed at particular positions, they can be
> identified and understood much better, especially if multiple persons
> speak at the same time.
>
> Thus, I would suggest to give the low complexity mono mixing a low
> priority and the stereo mixing a higher priority.
>
>--
>Ticket URL: <http://tools.ietf.org/wg/codec/trac/ticket/3>
>codec <http://tools.ietf.org/codec/>
>
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