1、 IEC 62481-9 Edition 1.0 2017-07 INTERNATIONAL STANDARD Digital living network alliance (DLNA) home networked device interoperability guidelines Part 9: HTTP Adaptive Delivery IEC 62481-9:2017-07(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All ri
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11、ity guidelines Part 9: HTTP Adaptive Delivery INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.160; 35.100.05; 35.110 ISBN 978-2-8322-4549-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. col
12、our inside 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 ho
13、me 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
14、 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
15、.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 syste
16、m 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
17、 HTTP Adaptive Delivery 13 IEC 62481-9:2017 IEC 2017 3 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 or
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27、ons. 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 pate
28、nt 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
29、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 h
30、as 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 com
31、mittee 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 a
32、mended. 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
33、document using a colour printer. IEC 62481-9:2017 IEC 2017 5 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 con
34、veniently 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 consumer
35、s 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
36、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 Ada
37、ptive 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 tim
38、ed 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, onl
39、y 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, D
40、igital 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
41、 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. Be
42、rners-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 termi
43、nological 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 IEC 62481-9:2017 IEC 2017 7 3.1 Definitions 3.1.1 Adaptive Content multimedia content encoded into mu
44、ltiple streams using different parameters (i.e. different bitrate) for the purpose of dynamic switching between different streams during a media delivery session 3.2 Abbreviated terms HTTP-AD HTTP Adaptive Delivery MPEG DASH MPEG Dynamic Adaptive Streaming over HTTP MPD Media Presentation Descriptio
45、n XDMR Extended Digital Media Renderer 3.3 Convention In IEC 62481-1-1:2017 and this document, a number of terms, conditions, mechanisms, sequences, parameters, events, states, or similar terms are printed with the first letter of each word in uppercase and the rest lowercase (e.g., Adaptive Content
46、). Any lowercase uses of these words have the normal technical English meanings. 4 Networking architecture and guideline conventions 4.1 DLNA home networking architecture This specification extends the DLNA home networking architecture that is defined in Clause 4 of IEC 62481-1-1:2017. 4.2 HTTP Adap
47、tive Delivery HTTP Adaptive Delivery Device Option provides guidelines for the dynamic and adaptive HTTP streaming of multimedia content. HTTP Adaptive Delivery can include sources of content both within the home network and from the internet. The content MPD is intended to be discoverable and deliv
48、erable from any device that acts as a content source and exposes content using the DIDL-Lite framework. 4.3 Document conventions See Clause 6 of IEC 62481-1-1:2017 for a description of the DLNA document conventions. 4.4 Guideline structure See 7.1 of IEC 62481-1-1:2017 for guideline and attribute ta
49、ble layout descriptions. 5 DLNA device model 5.1 General Refer to Clause 5 of IEC 62481-1-1:2017, for detailed descriptions of existing DLNA home networking architecture device model. This specification extends the existing DLNA system usages. 8 IEC 62481-9:2017 IEC 2017 5.2 Device capabilities and roles HTTP Adaptive Delivery Device Option specified in these guidelines provides extensibility for DLNA HTTP streaming to deliver adaptive and dynamic multimedia content by dynamic
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