RTP Payload Format for G.711.0
RFC 7655
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Type |
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RFC - Proposed Standard
(November 2015; No errata)
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Last updated |
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2019-03-19
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Replaces |
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draft-ramalho-payload-g7110
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Roni Even
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Shepherd write-up |
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Show
(last changed 2014-04-01)
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| IESG |
IESG state |
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RFC 7655 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Ben Campbell
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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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
8. Security Considerations . . . . . . . . . . . . . . . . . . . 27
9. Congestion Control . . . . . . . . . . . . . . . . . . . . . 28
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