RTP payload format for Enhanced Variable Rate Narrowband-Wideband Codec (EVRC-NW)
draft-ietf-avt-rtp-evrc-nw-09
| The information below is for an old version of the document | |||
|---|---|---|---|
| Document | Type | Active Internet-Draft (payload WG) | |
| Author | Zheng Fang | ||
| Last updated | 2012-12-20 (latest revision 2012-12-13) | ||
| Replaces | draft-zfang-avt-rtp-evrc-nw | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Roni Even | ||
| Shepherd write-up | Show (last changed 2012-11-19) | ||
| IESG | IESG state | IESG Evaluation::Revised I-D Needed | |
| Consensus Boilerplate | Unknown | ||
| Telechat date |
Needs a YES. Needs 9 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Robert Sparks | ||
| IESG note | Roni Even (roni.even@mail01.huawei.com) is the Document Shepherd. | ||
| Send notices to | payload-chairs@tools.ietf.org, draft-ietf-avt-rtp-evrc-nw@tools.ietf.org | ||
Network Working Group Z. Fang
Internet-Draft Qualcomm Incorporated
Intended status: Standards Track December 13, 2012
Expires: June 16, 2013
RTP payload format for Enhanced Variable Rate Narrowband-Wideband Codec
(EVRC-NW)
draft-ietf-avt-rtp-evrc-nw-09
Abstract
This document specifies real-time transport protocol (RTP) payload
formats to be used for the Enhanced Variable Rate Narrowband-Wideband
Codec (EVRC-NW). Three media type registrations are included for
EVRC-NW RTP payload formats. In addition, a file format is specified
for transport of EVRC-NW speech data in storage mode applications
such as e-mail.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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-
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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 June 16, 2013.
Copyright Notice
Copyright (c) 2012 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
Fang Expires June 16, 2013 [Page 1]
Internet-Draft EVRC-NW RTP payload format December 2012
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Background . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. EVRC-NW codec . . . . . . . . . . . . . . . . . . . . . . . . 6
5. RTP header usage . . . . . . . . . . . . . . . . . . . . . . . 7
6. Payload format . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Encoding capability identification in EVRC-NW
interleaved/bundled format . . . . . . . . . . . . . . . . 8
7. Congestion Control Considerations . . . . . . . . . . . . . . 11
8. Storage format for the EVRC-NW Codec . . . . . . . . . . . . . 12
9. IANA considerations . . . . . . . . . . . . . . . . . . . . . 13
9.1. Media Type Registrations . . . . . . . . . . . . . . . . . 13
9.1.1. Registration of Media Type audio/EVRCNW . . . . . . . 13
9.1.2. Registration of Media Type audio/EVRCNW0 . . . . . . . 15
9.1.3. Registration of Media Type audio/EVRCNW1 . . . . . . . 16
10. SDP mode attributes for EVRC-NW . . . . . . . . . . . . . . . 19
11. Mode Change Request/Response Considerations . . . . . . . . . 20
12. Mapping EVRC-NW media type parameters into SDP . . . . . . . . 22
13. Offer-Answer Model Considerations for EVRC-NW . . . . . . . . 23
14. Declarative SDP Considerations . . . . . . . . . . . . . . . . 25
15. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
16. Security Considerations . . . . . . . . . . . . . . . . . . . 29
17. References . . . . . . . . . . . . . . . . . . . . . . . . . . 30
17.1. Normative References . . . . . . . . . . . . . . . . . . . 30
17.2. Informative References . . . . . . . . . . . . . . . . . . 31
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 32
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1. Introduction
This document specifies the payload formats for packetization of
EVRC-NW encoded speech signals into the real-time transport protocol
(RTP). It defines support for the header-free, interleaved/bundled,
and compact bundle packet formats for the EVRC-NW codec as well as
discontinuous transmission (DTX) support for EVRC-NW encoded speech
transported via RTP. The EVRC-NW codec offers better speech quality
than the EVRC and EVRC-B codecs and better capacity than EVRC-WB
codec. EVRC-NW belongs to the EVRC family of codecs.
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