Inter-Destination Media Synchronization (IDMS) Using the RTP Control Protocol (RTCP)
RFC 7272
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RFC - Proposed Standard
(June 2014; No errata)
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Last updated |
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2018-12-20
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Replaces |
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draft-brandenburg-avtcore-rtcp-for-idms
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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 2013-05-28)
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| IESG |
IESG state |
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RFC 7272 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Richard Barnes
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IESG note |
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Roni Even (roni.even@mail01.huawei.com) is the Document Shepherd.
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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) R. van Brandenburg
Request for Comments: 7272 H. Stokking
Category: Standards Track O. van Deventer
ISSN: 2070-1721 TNO
F. Boronat
M. Montagud
UPV
K. Gross
AVA Networks
June 2014
Inter-Destination Media Synchronization (IDMS)
Using the RTP Control Protocol (RTCP)
Abstract
This document defines a new RTP Control Protocol (RTCP) Packet Type
and an RTCP Extended Report (XR) Block Type to be used for achieving
Inter-Destination Media Synchronization (IDMS). IDMS is the process
of synchronizing playout across multiple media receivers. Using the
RTCP XR IDMS Report Block defined in this document, media playout
information from participants in a synchronization group can be
collected. Based on the collected information, an RTCP IDMS Settings
Packet can then be sent to distribute a common target playout point
to which all the distributed receivers, sharing a media experience,
can synchronize.
Typical use cases in which IDMS is useful are social TV, shared
service control (i.e., applications where two or more geographically
separated users are watching a media stream together), distance
learning, networked video walls, networked loudspeakers, etc.
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/rfc7272.
van Brandenburg, et al. Standards Track [Page 1]
RFC 7272 RTCP for IDMS June 2014
Copyright Notice
Copyright (c) 2014 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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Rationale . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Applicability of RTCP to IDMS . . . . . . . . . . . . . . 3
2.2. IDMS and ETSI . . . . . . . . . . . . . . . . . . . . . . 4
3. Inter-Destination Media Synchronization (IDMS) Use Cases . . 4
4. Overview of IDMS Operation . . . . . . . . . . . . . . . . . 5
5. Architecture for Inter-Destination Media Synchronization . . 7
5.1. Media Synchronization Application Server (MSAS) . . . . . 7
5.2. Synchronization Client (SC) . . . . . . . . . . . . . . . 8
5.3. Communication between MSAS and SCs . . . . . . . . . . . 8
6. RTCP XR IDMS Report Block . . . . . . . . . . . . . . . . . . 8
7. RTCP Packet Type for IDMS (IDMS Settings Packet) . . . . . . 11
8. Timing and NTP Considerations . . . . . . . . . . . . . . . . 13
9. On the Use of Presentation Timestamps . . . . . . . . . . . . 14
10. SDP Signaling for RTCP IDMS Settings Packet . . . . . . . . . 15
11. SDP Rules . . . . . . . . . . . . . . . . . . . . . . . . . . 16
11.1. Offer/Answer Rules . . . . . . . . . . . . . . . . . . . 16
11.2. Declarative Cases . . . . . . . . . . . . . . . . . . . 17
12. Security Considerations . . . . . . . . . . . . . . . . . . . 17
13. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
13.1. RTCP IDMS Packet Type . . . . . . . . . . . . . . . . . 18
13.2. RTCP XR IDMS Report Block . . . . . . . . . . . . . . . 19
13.3. RTCP-IDMS SDP Attribute . . . . . . . . . . . . . . . . 19
13.4. IDMS XR Block SPST Registry . . . . . . . . . . . . . . 19
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