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

On Jan 29, 2014, at 1:58 AM, Magnus Westerlund <magnus.westerlund@ericsson.com> wrote:

> 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?

No objections. 

In practice primes other than 20, 30, 40 , and 60 have high failure rates - I would expect tons of failures for 5 ms.

> 
> Cheers
> 
> Magnus
> 
> On 2014-01-27 23:25, internet-drafts@ietf.org 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/
>> 
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>> 
>> 
> 
> 
> -- 
> 
> Magnus Westerlund
> 
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