WebRTC Codec and Media Processing Requirements
draft-cbran-rtcweb-codec-01

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Document Type Active Internet-Draft (individual)
Last updated 2011-10-29 (latest revision 2011-07-01)
Replaced by draft-ietf-rtcweb-audio, rfc7874, rfc7742, draft-ietf-rtcweb-video
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Network Working Group                                            C. Bran
Internet-Draft                                               Plantronics
Intended status: Standards Track                             C. Jennings
Expires: May 1, 2012                                               Cisco
                                                        October 29, 2011

             WebRTC Codec and Media Processing Requirements
                      draft-cbran-rtcweb-codec-01

Abstract

   This document outlines the codec and media 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.  This document may not be modified,
   and derivative works of it may not be created, and it may not be
   published except as an Internet-Draft.

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   This Internet-Draft will expire on May 1, 2012.

Copyright Notice

   Copyright (c) 2011 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
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Bran & Jennings            Expires May 1, 2012                  [Page 1]
Internet-Draft              Abbreviated-Title               October 2011

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Codec Requirements  . . . . . . . . . . . . . . . . . . . . . . 3
     3.1.  Audio Codec Requirements  . . . . . . . . . . . . . . . . . 3
     3.2.  Video Codec Requirements  . . . . . . . . . . . . . . . . . 3
   4.  WebRTC Client Requirements  . . . . . . . . . . . . . . . . . . 4
   5.  Legacy VoIP Interoperability  . . . . . . . . . . . . . . . . . 5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 5
   9.  Normative References  . . . . . . . . . . . . . . . . . . . . . 5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 6

Bran & Jennings            Expires May 1, 2012                  [Page 2]
Internet-Draft              Abbreviated-Title               October 2011

1.  Introduction

   An integral part of the success and adoption of the Web Real Time
   Communications (WebRTC) will be the voice and video interoperability
   between WebRTC applications.  This specification will outline the
   media processing and codec requirements for WebRTC client
   implementations.

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

   This section covers the audio and video codec requirements for WebRTC
   client applications.  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.

3.1.  Audio Codec Requirements

   WebRTC clients are REQUIRED to implement the following audio codecs.

   o  PCMA/PCMU - 1 channel with a rate of 8000 Hz and a ptime of 20 -
      see section 4.5.14 of [RFC3551]

   o  Telephone Event - [RFC4734]

   o  Opus [draft-ietf-codec-opus]

3.2.  Video Codec Requirements

   If the MPEG-LA issues an intent to offer H.264 baseline profile on a
   royalty free basis for use in browsers before March 15, 2012, then
   the REQUIRED video codecs will be H.264 baseline.  If this does not
   happen by that the date, then the REQUIRED video codec will be VP8
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