RTP Payload Format for VC-2 High Quality (HQ) Profile
RFC 8450
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RFC - Proposed Standard
(October 2018; No errata)
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Last updated |
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2018-10-05
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Replaces |
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draft-weaver-payload-rtp-vc2hq
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IETF
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plain text
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Submitted to IESG for Publication
(wg milestone:
May 2017 - submit RTP Payload F...
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Document shepherd |
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Ali Begen
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Shepherd write-up |
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Show
(last changed 2018-01-23)
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RFC 8450 (Proposed Standard)
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Yes
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Ben Campbell
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) J. Weaver
Request for Comments: 8450 BBC
Category: Standards Track October 2018
ISSN: 2070-1721
RTP Payload Format for VC-2 High Quality (HQ) Profile
Abstract
This memo describes an RTP payload format for the High Quality (HQ)
profile of Society of Motion Picture and Television Engineers
Standard ST 2042-1, known as VC-2. This document describes the
transport of HQ Profile VC-2 in RTP packets and has applications for
low-complexity, high-bandwidth streaming of both lossless and lossy
compressed video.
The HQ profile of VC-2 is intended for low-latency video compression
(with latency potentially on the order of lines of video) at high
data rates (with compression ratios on the order of 2:1 or 4:1).
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 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8450.
Weaver Standards Track [Page 1]
RFC 8450 VC-2 HQ RTP Payload October 2018
Copyright Notice
Copyright (c) 2018 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
(https://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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions, Definitions, and Acronyms . . . . . . . . . . . 3
3. Media Format Description . . . . . . . . . . . . . . . . . . 3
4. Payload Format . . . . . . . . . . . . . . . . . . . . . . . 4
4.1. RTP Header Usage . . . . . . . . . . . . . . . . . . . . 10
4.2. Payload Header . . . . . . . . . . . . . . . . . . . . . 11
4.3. The Choice of Parse Codes (Informative) . . . . . . . . . 13
4.4. Stream Constraints . . . . . . . . . . . . . . . . . . . 14
4.5. Payload Data . . . . . . . . . . . . . . . . . . . . . . 15
4.5.1. Reassembling the Data . . . . . . . . . . . . . . . . 16
5. Forward Error Correction (FEC) Considerations . . . . . . . . 18
6. Congestion Control Considerations . . . . . . . . . . . . . . 18
7. Payload Format Parameters . . . . . . . . . . . . . . . . . . 19
7.1. Media Type Definition . . . . . . . . . . . . . . . . . . 19
7.2. Mapping to the Session Description Protocol (SDP) . . . . 21
7.3. Offer/Answer Considerations . . . . . . . . . . . . . . . 21
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
9. Security Considerations . . . . . . . . . . . . . . . . . . . 21
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 22
10.1. Normative References . . . . . . . . . . . . . . . . . . 22
10.2. Informative References . . . . . . . . . . . . . . . . . 23
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 24
Weaver Standards Track [Page 2]
RFC 8450 VC-2 HQ RTP Payload October 2018
1. Introduction
This memo specifies an RTP payload format for the video coding
standard Society of Motion Picture and Television Engineers ST
2042-1:2017 [VC2], also known as VC-2
The VC-2 codec is a wavelet-based codec intended primarily for
professional video use with high bit-rates and only low levels of
compression. It has been designed to have a low level of complexity
and potentially a very low latency through both encoder and decoder:
with some choices of parameters, this latency may be as low as a few
lines of video.
The low level of complexity in the VC-2 codec allows for this low-
latency operation but also means that it lacks many of the more
powerful compression techniques used in other codecs. As such, it is
suitable for low compression ratios that produce coded data rates
around half to a quarter of that of uncompressed video, at a similar
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