Re: [rtcweb] I-D Action: draft-ietf-rtcweb-audio-04.txt

[Magnus Westerlund <[e-mail]>]

WG,

I reviewed the changes introduced here resolves my previous comments.
However, I have to raise one question to the WG.

In Section 3:

   o  G.711 PCMA and PCMU with one channel, a rate of 8000 Hz and any
      ptime value up to 120 ms - see section 4.5.14 of [RFC3551]

It is likely good that one ensures that ones implementation can receive
any number of samples in the RTP payload format. It is also good that
one can send whatever in that range the peer requests. However, I would
note that it is likely good that an implementation restrains oneself to
request ptime values from the peer that are 5 ms increments and likely
20 ms increments for higher values. I have the impression that the used
values are like, 5, 10, 20, 30, 40, 60, 80, 100, 120 ms.

Anyone having any position on this?

Cheers

Magnus

On 2014-01-27 23:25, [e-mail] wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>  This draft is a work item of the Real-Time Communication in WEB-browsers Working Group of the IETF.
> 
>         Title           : WebRTC Audio Codec and Processing Requirements
>         Authors         : Jean-Marc Valin
>                           Cary Bran
> 	Filename        : draft-ietf-rtcweb-audio-04.txt
> 	Pages           : 6
> 	Date            : 2014-01-27
> 
> Abstract:
>    This document outlines the audio codec and processing requirements
>    for WebRTC client application and endpoint devices.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-rtcweb-audio/
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-rtcweb-audio-04
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-ietf-rtcweb-audio-04
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> I-D-Announce mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> 
> 


-- 

Magnus Westerlund

----------------------------------------------------------------------
Services, Media and Network features, Ericsson Research EAB/TXM
----------------------------------------------------------------------
Ericsson AB                 | Phone  [phone]
Färögatan 6                 | Mobile [phone]
SE-164 80 Stockholm, Sweden | mailto: [e-mail]
----------------------------------------------------------------------