--- 1/draft-ietf-rtcweb-audio-02.txt 2013-10-15 13:14:27.389595844 -0700 +++ 2/draft-ietf-rtcweb-audio-03.txt 2013-10-15 13:14:27.405596238 -0700 @@ -1,19 +1,19 @@ Network Working Group JM. Valin Internet-Draft Mozilla Intended status: Standards Track C. Bran -Expires: February 03, 2014 Plantronics - August 02, 2013 +Expires: April 18, 2014 Plantronics + October 15, 2013 WebRTC Audio Codec and Processing Requirements - draft-ietf-rtcweb-audio-02 + draft-ietf-rtcweb-audio-03 Abstract This document outlines the audio codec and processing requirements for WebRTC client application and endpoint devices. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. @@ -21,21 +21,21 @@ Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." - This Internet-Draft will expire on February 03, 2014. + This Internet-Draft will expire on April 18, 2014. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents @@ -68,24 +68,25 @@ 2. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. 3. Codec Requirements To ensure a baseline level of interoperability between WebRTC - clients, a minimum set of required codecs are specified below. While - this section specifies the codecs that will be mandated for all - WebRTC client implementations, it leaves the question of supporting - additional codecs to the will of the implementer. + clients, a minimum set of required codecs are specified below. If + other suitable audio codecs are available for the browser to use, it + is RECOMMENDED that they are also be included in the offer in order + to maximize the possibility to establish the session without the need + for audio transcoding. WebRTC clients are REQUIRED to implement the following audio codecs. o Opus [RFC6716], with the payload format specified in [Opus-RTP] and any ptime value up to 120 ms o G.711 PCMA and PCMU with one channel, a rate of 8000 Hz and a ptime of 20 - see section 4.5.14 of [RFC3551] o Telephone Event - [RFC4733]