IEC 62481-9:2017

IEC 62481-9 ®
Edition 1.0 2017-07
INTERNATIONAL
STANDARD
colour
inside
Digital living network alliance (DLNA) home networked device interoperability
guidelines –
Part 9: HTTP Adaptive Delivery
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC 62481-9 ®
Edition 1.0 2017-07
INTERNATIONAL
STANDARD
colour
inside
Digital living network alliance (DLNA) home networked device interoperability

guidelines –
Part 9: HTTP Adaptive Delivery

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160; 35.100.05; 35.110 ISBN 978-2-8322-4549-1

– 2 – IEC 62481-9:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms and conventions . 6
3.1 Definitions. 7
3.2 Abbreviated terms . 7
3.3 Convention . 7
4 Networking architecture and guideline conventions . 7
4.1 DLNA home networking architecture . 7
4.2 HTTP Adaptive Delivery . 7
4.3 Document conventions . 7
4.4 Guideline structure . 7
5 DLNA device model . 7
5.1 General . 7
5.2 Device capabilities and roles . 8
5.3 System usages . 8
5.3.1 General . 8
5.3.2 2-box Pull system usage . 8
5.3.3 2-box Push system usage . 9
5.3.4 3-box system usage . 10
5.3.5 2-box and 3-box RUI with AV system usage. 11
5.3.6 Adaptive Internet Resource Media delivery usage . 12
6 HTTP Adaptive Delivery media management guidelines . 13
6.1 General . 13
6.2 General compliance guidelines . 13
6.2.1 Overview . 13
6.2.2 MPEG DASH compliance . 14
6.2.3 DASH_MPD media profile compliance . 14
6.3 Adaptive content description . 14
6.4 MPD and segment guidelines . 17
6.4.1 MPD format requirements for Serving Endpoints . 17
6.4.2 MPD handling requirements for Rendering Endpoints . 17
6.5 Media formats . 18
6.6 Adaptation rules . 18

Figure 1 – 2-box Pull system usage with HTTP Adaptive Delivery . 9
Figure 2 – 2-box Push system usage with HTTP Adaptive Delivery . 10
Figure 3 – 3-box system usage with HTTP Adaptive Delivery . 11
Figure 4 – 2-box and 3-box RUI AV system usage with HTTP Adaptive Delivery . 12
Figure 5 – Adaptive Internet Resource Media delivery usage with HTTP Adaptive
Delivery . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL LIVING NETWORK ALLIANCE (DLNA) HOME
NETWORKED DEVICE INTEROPERABILITY GUIDELINES –

Part 9: HTTP Adaptive Delivery

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62481-9 has been prepared under technical area 8: Multimedia
home systems and applications for end-user network, of IEC technical committee 100: Audio,
video and multimedia systems and equipment.
The text of this International Standard is based on the following documents:
CDV Report on voting
100/2748/CDV 100/2891/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62481-9:2017 © IEC 2017
A list of all parts of IEC 62481 series, published under the general title Digital Living Network
Alliance (DLNA) home networked device interoperability guidelines, can be found on the IEC
website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
Consumers are acquiring, viewing, and managing an increasing amount of digital media
(photos, music, and video) on devices in the consumer electronics (CE), mobile, and personal
computer (PC) domains. As such, they want to conveniently enjoy the content, regardless of
the source, across different devices and locations in the home. The digital home vision
integrates the internet, mobile, and broadcast networks through a seamless, interoperable
network, which will provide a unique opportunity for manufacturers and consumers alike. In
order to deliver on this vision, a common set of industry design guidelines is needed that
allows vendors to participate in a growing marketplace, leading to more innovation, simplicity,
and value for consumers. This document serves that purpose and provides vendors with the
information needed to build interoperable networked platforms and devices for the digital
home.
– 6 – IEC 62481-9:2017 © IEC 2017
DIGITAL LIVING NETWORK ALLIANCE (DLNA) HOME
NETWORKED DEVICE INTEROPERABILITY GUIDELINES –

Part 9: HTTP Adaptive Delivery

1 Scope
This part of IEC 62481 specifies guidelines for the DLNA Adaptive Delivery using HTTP
protocol.
The DLNA interoperability guidelines for Adaptive Delivery are based on ISO/IEC 23009-
1:2014 standard and enables content authors to describe content in timed segments at
various bit rates and media formats. Client rendering devices can select the appropriate timed
segments (e.g. bit rate) based on network congestion to maintain smooth streaming of content
for display.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 62481-1-1:2017, Digital living network alliance (DLNA) home networked device
interoperability guidelines – Part 1-1: Architecture and protocols
IEC 62481-2:2017, Digital living network alliance (DLNA) home networked device
interoperability guidelines – Part 2: Media format profiles
IEC 62481-6-1:2017, Digital living network alliance (DLNA) home networked device
interoperability guidelines – Part 6-1: Remote user interface – HTML5
ISO/IEC 23009-1:2014, Informational technology – Dynamic adaptive streaming over HTTP
(DASH) – Part 1: Media presentation description and segment formats
IETF RFC 2616, Hypertext Transfer Protocol – HTTP/1.1, R. Fielding, UC Irvine, J. Gettys,
Compaq/W3C, J. Mogul, Compaq, H. Frystyk, W3C/MIT, L. Masinter, Xerox, P. Leach,
Microsoft, T. Berners-Lee
http://www.ietf.org/rfc/rfc2616.txt
3 Terms, definitions, abbreviated terms and conventions
For the purposes of this document, the terms, definitions and abbreviated terms given in
IEC 62481-1-1:2017, IEC 62481-2:2017, ISO/IEC 23009-1:2014 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

3.1 Definitions
3.1.1
Adaptive Content
multimedia content encoded into multiple streams using different parameters (i.e. d
...