RTP Payload Format for G.711.0
RFC 7655

Document Type RFC - Proposed Standard (November 2015; No errata)
Last updated 2015-11-02
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Roni Even
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IESG IESG state RFC 7655 (Proposed Standard)
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Responsible AD Ben Campbell
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IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                   M. Ramalho, Ed.
Request for Comments: 7655                                      P. Jones
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                                N. Harada
                                                                     NTT
                                                              M. Perumal
                                                                Ericsson
                                                                 L. Miao
                                                     Huawei Technologies
                                                           November 2015

                     RTP Payload Format for G.711.0

Abstract

   This document specifies the Real-time Transport Protocol (RTP)
   payload format for ITU-T Recommendation G.711.0.  ITU-T Rec. G.711.0
   defines a lossless and stateless compression for G.711 packet
   payloads typically used in IP networks.  This document also defines a
   storage mode format for G.711.0 and a media type registration for the
   G.711.0 RTP payload format.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7655.

Ramalho, et al.              Standards Track                    [Page 1]
RFC 7655                 G.711.0 Payload Format            November 2015

Copyright Notice

   Copyright (c) 2015 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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Ramalho, et al.              Standards Track                    [Page 2]
RFC 7655                 G.711.0 Payload Format            November 2015

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  G.711.0 Codec Background  . . . . . . . . . . . . . . . . . .   4
     3.1.  General Information and Use of the ITU-T G.711.0 Codec  .   4
     3.2.  Key Properties of G.711.0 Design  . . . . . . . . . . . .   6
     3.3.  G.711 Input Frames to G.711.0 Output Frames . . . . . . .   8
       3.3.1.  Multiple G.711.0 Output Frames per RTP Payload
               Considerations  . . . . . . . . . . . . . . . . . . .   9
   4.  RTP Header and Payload  . . . . . . . . . . . . . . . . . . .  10
     4.1.  G.711.0 RTP Header  . . . . . . . . . . . . . . . . . . .  10
     4.2.  G.711.0 RTP Payload . . . . . . . . . . . . . . . . . . .  12
       4.2.1.  Single G.711.0 Frame per RTP Payload Example  . . . .  12
       4.2.2.  G.711.0 RTP Payload Definition  . . . . . . . . . . .  13
         4.2.2.1.  G.711.0 RTP Payload Encoding Process  . . . . . .  14
       4.2.3.  G.711.0 RTP Payload Decoding Process  . . . . . . . .  15
       4.2.4.  G.711.0 RTP Payload for Multiple Channels . . . . . .  17
   5.  Payload Format Parameters . . . . . . . . . . . . . . . . . .  19
     5.1.  Media Type Registration . . . . . . . . . . . . . . . . .  20
     5.2.  Mapping to SDP Parameters . . . . . . . . . . . . . . . .  22
     5.3.  Offer/Answer Considerations . . . . . . . . . . . . . . .  22
     5.4.  SDP Examples  . . . . . . . . . . . . . . . . . . . . . .  23
       5.4.1.  SDP Example 1 . . . . . . . . . . . . . . . . . . . .  23
       5.4.2.  SDP Example 2 . . . . . . . . . . . . . . . . . . . .  23
   6.  G.711.0 Storage Mode Conventions and Definition . . . . . . .  24
     6.1.  G.711.0 PLC Frame . . . . . . . . . . . . . . . . . . . .  24
     6.2.  G.711.0 Erasure Frame . . . . . . . . . . . . . . . . . .  25
     6.3.  G.711.0 Storage Mode Definition . . . . . . . . . . . . .  26
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  27
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