Subject: Re: [rtcweb] I-D Action: draft-ietf-rtcweb-audio-codecs-for-interop-03.txt

From: "Mishra, Sanjay" <[email-masked]>
Date: Wed, 2 Dec 2015 13:06:15 -0500

Hi Stephane – I reviewed -03 and have a few nits.

1.       Introduction

-          Change “transcodings” to “transcoding” (last sentence)

2.       Section 3

-          Change sentence “The drawbacks of such transcoding operations are recalled below” to “ The drawback of such transcoding operations are listed below”

-          2nd Bullet (last sentence)

o    “…end to end delay beyond acceptable limits like with more than 1s end to end latency.” Remove use of “like” in the sentence and expand the short-hand notation where you use “1s”. If you mean 1 second, just say so.

-          3rd bullet

o   Change “costs in networks” to “cost in networks” (used in two places)

o   Change “codecs license” to “codec licenses”

o   Change “deployments, testing and validation costs” to “deployment, testing and validation cost”

o   Change “…be more costly than between narrowband codecs.” to “more costly than transcoding between narrowband codecs”

3.       Section 4

-          Instead of writing “…relevant suitable…”, just use either relevant or suitable

4.       Section 4.1.1.

-          Remove “like” from the sentence “…telephony services over IP/IMS like for voice over LTE…”

-          Make “Source code” lower case

5.       Section 4.1.2

-          Change “hundreds of devices models” to “hundreds of device models”

-          Change “450 millions.” to “450 million.”

6.       Section 4.1.3

-          1st bullet

o   Placement of comma is confusing in “Offer AMR in addition to AMR-WB with AMR-WB, being a wideband code, listed first… “ Suggest to change sentence to something like “Offer AMR in addition to AMR-WB (AMR-WB being a wideband codec listed first….”)

7.       Section 4.2.1

-          Change “i.e.” to “i.e.,”

-          Add comma after “such as” -> “such as, GSMA voice IMS profile…”

8.       Section 4.2.2

-          Change “there is” to “there are still a high number of legacy terminals …”

-          Change “…only AMR (terminals with no wideband / HD Voice capabilities) are still used.” to “only AMR (terminals with no wideband/HD voice capabilities) that are still in use.”

9.       Section 4.3.2

-          Change “150 Millions per year” to “150 million per year”

10.   Section 4.3.3

-          Change “…Multimedia Telephony services overs IMS…” to “…multimedia telephony services over IMS…”

Thanks
Sanjay

-----Original Message-----
From: rtcweb [mailto:[email-masked]] On Behalf Of [email-masked]
Sent: Wednesday, December 02, 2015 3:18 AM
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Subject: [rtcweb] I-D Action: draft-ietf-rtcweb-audio-codecs-for-interop-03.txt

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           : Additional WebRTC audio codecs for interoperability.
        Author          : Stephane Proust
                Filename        : draft-ietf-rtcweb-audio-codecs-for-interop-03.txt
                Pages           : 11
                Date            : 2015-12-02

Abstract:
   To ensure a baseline level of interoperability between WebRTC
   clients, a minimum set of required codecs is specified.  However, to
   maximize the possibility to establish the session without the need
   for audio transcoding, it is also recommended to include in the offer
   other suitable audio codecs that are available to the browser.

   This document provides some guidelines on the suitable codecs to be
   considered for WebRTC clients to address the most relevant
   interoperability use cases.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-rtcweb-audio-codecs-for-interop/

There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-rtcweb-audio-codecs-for-interop-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-rtcweb-audio-codecs-for-interop-03