IEC 62766-2-2:2016

Consumer terminal function for access to IPTV and open internet multimedia services - Part 2-2: HTTP adaptive streaming

IEC 62766-2-2:2016 specifies media formats for adaptive unicast content streaming over HTTP. Two HTTP adaptive streaming formats are specified. The first is based entirely on MPEG DASH. The second is the OIPF “HTTP adaptive streaming” (HAS) format, which is based upon 3GPP’s release 9 adaptive HTTP streaming (AHS) format, with some profiling and extensions to add the features of media components and support for MPEG-2 transport stream content segment format. The latter format was specified before MPEG DASH had been published. It is retained due to usage in some legacy applications.

Fonction des terminaux grand public pour l'accès aux services IPTV et multimédias de l'internet ouvert - Partie 2-2: Diffusion en flux adaptatif sur HTTP

L'IEC 62766-2-2:2016 spécifie les formats de médias pour une diffusion en flux adaptatif de contenu en monodiffusion sur HTTP. Deux formats de diffusion en flux adaptatif sur HTTP sont spécifiés. Le premier repose entièrement sur le format MPEG DASH. Le second est le format de "diffusion en flux adaptatif sur HTTP" (HAS) de l'OIPF, basé sur le format de diffusion en flux adaptatif sur HTTP version 9 de 3GPP, certains profils et extensions ajoutant les caractéristiques des composants médias et prenant en charge le format de segment de contenu du flux de transport MPEG-2. Ce dernier format a été spécifié avant la publication du format MPEG DASH. Il est maintenu en raison de son utilisation dans certaines applications existantes.

General Information

• Status: Published
• Publication Date: 13-Dec-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.170 - Television and radio broadcasting
• ICS: 35.240.95 - Internet applications
• Technical Committee: TC 100 - Audio, video and multimedia systems and equipment
• Drafting Committee: MT 62766 - TC 100/MT 62766
• Current Stage: PPUB - Publication issued
• Start Date: 28-Feb-2017
• Completion Date: 14-Dec-2016

Standards Content (Sample)

IEC 62766-2-2
®

Edition 1.0 2016-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Consumer terminal function for access to IPTV and open internet multimedia
services –
Part 2-2: HTTP adaptive streaming

Fonction des terminaux grand public pour l’accès aux services IPTV et
multimédias de l'internet ouvert –
Partie 2-2: Diffusion en flux adaptatif sur HTTP

IEC 62766-2-2:2016-12(en-fr)

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IEC 62766-2-2

®


Edition 1.0 2016-12




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Consumer terminal function for access to IPTV and open internet multimedia

services –

Part 2-2: HTTP adaptive streaming




Fonction des terminaux grand public pour l’accès aux services IPTV et

multimédias de l'internet ouvert –


Partie 2-2: Diffusion en flux adaptatif sur HTTP













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.170; 35.240.95 ISBN 978-2-8322-3689-5



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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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− 2 − IEC 62766-2-2:2016  IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 General . 8
3.2 Terms and definitions . 8
3.3 Abbreviated terms . 9
4 Adaptive streaming in the OIPF IPTV solution . 10
5 MPEG DASH based adaptive streaming . 11
5.1 General . 11
5.2 DASH usage for the TS systems layer format . 12
5.2.1 General . 12
5.2.2 PID allocation . 12
5.2.3 Protected TS content . 12
5.3 DASH usage for the MP4 systems layer format . 13
5.3.1 General . 13
5.3.2 Protected content . 13
5.4 Operational parameters . 14
5.5 Adaptation set audio/video source coding . 14
5.6 MPD requirements, audio description . 15
5.7 Key management of protected contents . 15
6 OIPF HTTP adaptive streaming . 15
6.1 General . 15
6.2 Media presentation . 16
6.2.1 Media presentation description . 16
6.2.2 Component element . 16
6.3 Segmentation constraints . 18
6.4 Signalling of content protection in the MPD . 20
6.5 Media presentation description updates . 20
6.6 Adaptive media formats . 20
6.6.1 General . 20
6.6.2 MPEG-2 transport stream systems layer . 20
6.6.3 MP4 file format systems layer . 22
6.7 Use cases . 23
6.7.1 Live streaming . 23
6.7.2 Trick play . 23
6.7.3 MPEG-2 TS seeking . 24
Annex A (normative) OIPF HAS MPD schema . 25
Annex B (informative) OIPF HAS component management . 26
Annex C (informative) Usage of the MP4 file format in OIPF HAS . 28
C.1 Audio/video synchronization . 28
C.2 Partial representations . 29
Annex D (informative) DASH usage with embedded CSPG . 31
Bibliography . 32

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IEC 62766-2-2:2016  IEC 2016 − 3 −
Figure 1 – Content segmentation for HTTP adaptive streaming . 10
Figure 2 – Example of the HAS MPD . 18
Figure A.1 – HAS MPD schema . 25
Figure B.1 – Component management example . 26
Figure C.1 – Example tfad-box . 29
Figure C.2 – Partial representation MP4 example . 30
Figure C.3 – Partial representation retrieval . 30

Table 1 – Role and accessibility descriptor values for audio description . 15
Table 2 – Component element and attributes . 17
Table C.1 – Example audio/video synchronization . 28

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− 4 − IEC 62766-2-2:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

CONSUMER TERMINAL FUNCTION FOR ACCESS TO IPTV
AND OPEN INTERNET MULTIMEDIA SERVICES –

Part 2-2: HTTP adaptive streaming

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
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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 62766-2-2 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
The text of this standard is based on the following documents:
CDV Report on voting
100/2488/CDV 100/2658/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.
This International Standard is to be used in conjunction with IEC 62766-1.

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IEC 62766-2-2:2016  IEC 2016 − 5 −
A list of all parts in the IEC 62766 series, published under the general title Consumer terminal
function for access to IPTV and open internet multimedia services, 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.

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.

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− 6 − IEC 62766-2-2:2016  IEC 2016
INTRODUCTION
The IEC 62766 series is based on a series of specifications that was originally developed by
the OPEN IPTV FORUM (OIPF). They specify the user-to-network interface (UNI) for
consumer terminals to access IPTV and open internet multimedia services over managed or
non-managed networks as defined by OIPF.

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IEC 62766-2-2:2016  IEC 2016 − 7 −
CONSUMER TERMINAL FUNCTION FOR ACCESS TO IPTV
AND OPEN INTERNET MULTIMEDIA SERVICES –

Part 2-2: HTTP adaptive streaming



1 Scope
This part of IEC 62766 specifies media formats for adaptive unicast content streaming over
HTTP.
Two HTTP adaptive streaming formats are specified. The first is based entirely on MPEG
DASH. The second is the OIPF “HTTP adaptive streaming” (HAS) format, which is based upon
3GPP’s release 9 adaptive HTTP streaming (AHS) format, with some profiling and extensions
to add the features of media components and support for MPEG-2 transport stream content
segment format. The latter format was specified before MPEG DASH had been published. It is
retained due to usage in some legacy applications.
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.
1
IEC 62766-1 , Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 1: General
IEC 62766-2-1, Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 2-1: Media formats
IEC 62766-3, Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 3: Content metadata
2
IEC 62766-4-1 , Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 4-1: Protocols
3
IEC 62766-5-1 , Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 5-1: Declarative application environment
4
IEC 62766-6 , Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 6: Procedural application environment
5
IEC 62766-7 , Consumer terminal function for access to IPTV and open Internet multimedia
services – Part 7: Authentication, content protection and service protection
__________
1
 Under preparation. Stage at the time of publication: IEC/CDV 62766-1:2015
2
 Under preparation. Stage at the time of publication: IEC/CDV 62766-4-1:2015
3
 Under preparation. Stage at the time of publication: IEC/CDV 62766-5-1:2015
4
 Under preparation. Stage at the time of publication: IEC/CDV 62766-6:2015
5
 Under preparation. Stage at the time of publication: IEC/CDV 62766-7:2015

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− 8 − IEC 62766-2-2:2016  IEC 2016
ISO/IEC 13818-1:2014, Information technology – Generic coding of moving pictures and
associated audio information – Part 1: Systems
ISO/IEC 14496-12:2012, Information technology – Coding of audio-visual objects – Part 12:
ISO base media file format
ISO/IEC 23001-7:2015, Information technology – MPEG systems technologies – Part 7:
Common encryption in ISO base media file format files
ISO/IEC 23009-1:2014, Information technology — Dynamic adaptive streaming over HTTP
(DASH) — Part 1: Media presentation description and segment formats
ISO 639 (all parts), Codes for the representation of names of languages
ETSI TS 101 154 V1.11.1 (2012-11), Digital Video Broadcasting (DVB); Specification for the
use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport
Stream
3GPP TS 26.234 V9.3.0 (2010-06), Transparent end-to-end Packet-switched Streaming
Service (PSS) Protocols and codecs (Release 9)
3GPP TS 26.244 V9.2.0 (2010-06), Transparent end-to-end packet switched streaming
service (PSS), 3GPP file format (3GP) (Release 9)
3GPP TS 26.247 V10.1.0 (2011-11), Transparent end-to-end Packet-switched Streaming
Service (PSS), Progressive Download and Dynamic adaptive streaming over HTTP (3GP-
DASH) (Release 10)
Marlin Developer Community, Marlin adaptive streaming Specification – Simple Profile,
Version 1.0, July 2011, available at
Marlin Developer Community, Marlin adaptive streaming Specification – Full Profile,
Version 1.0, August 2011, available at

3 Terms, definitions and abbreviated terms
3.1 General
The terms and definitions specified in 3.2 apply to the OIPF HAS format specified in Clause 6.
Where MPEG DASH defines the same terms in ISO/IEC 23009-1 the DASH definitions apply
to the specification of DASH usage in Clause 5.
3.2 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62766-1 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
3.2.1
content
instance of audio, video, audio-video information, or data

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IEC 62766-2-2:2016  IEC 2016 − 9 −
Note 1 to entry: The content is as defined in IEC 62766-1.
3.2.2
component
element of a content item, for example an audio or subtitle stream in a particular language or
a video stream from a particular camera view
3.2.3
component stream
bit stream that is the result of encoding a component with a certain codec and certain codec
parameters
Note 1 to entry: Examples of parameters are bitrate, resolution.
3.2.4
content resource
content item that is provided in multiple representations to enable adaptive streaming of that
content item
Note 1 to entry: Such representations are multiple qualities, bitrates, camera views, etc.
3.2.5
period
temporal clause of a content resource
3.2.6
representation
version of a content resource within a period
Note 1 to entry: Representations may differ in the included components and the included component streams.
3.2.7
segment
temporal clause of a representation in a specific systems layer format (either MPEG-2TS or
MP4), referred to via a unique URL
3.3 Abbreviated terms
3GPP ETSI 3rd Generation Partnership Project
3GP-DASH 3GPP Dynamic Adaptive Streaming over HTTP
AAC Advanced Audio Coding
AAC LC AAC Low Complexity
ATSC Advanced Television Systems Committee
BBTS Broadband Transport Stream
CA Conditional Access
CAT Conditional Access Table
DAE Declarative Application Environment
DCF DRM Content Format
DRM Digital Rights Management
DVB Digital Video Broadcasting
ECM Entitlement Control Message
EMM Entitlement Management Message
ETSI European Telecommunications Standards Institute
GOP Group Of Pictures
IPMP Intellectual Property Management and Protection

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− 10 − IEC 62766-2-2:2016  IEC 2016
IV Initialisation Vector
JPEG Joint Photographic Experts Group
MIPMP Marlin Intellectual Property Management Protocol
MP4 MP4 File Format
MPD Media Presentation Description
MPEG Moving Pictures Expert Group
nPVR Network Personal Video Recorder
NTP Network Time Protocol
OMA Open Mobile Alliance
PAE Procedural Application Environment
PAT Program Association Table
PDCF Packetised DRM Content Format
PF Protected Format
PID Packet Identifier
PMT Program Map Table
RAP Random Access Point
TCA Terminal Centric Approach
4 Adaptive streaming in the OIPF IPTV solution
Rather than providing a content asset as a single file or stream, in the case of HTTP adaptive
streaming, a service provides a content item in multiple bitrates in a way that enables a
terminal to adapt to (for example) variations in the available bandwidth by seamlessly
switching from one version to another, at a higher or lower bitrate, while receiving and playing
the content. This is achieved by encoding a content item in alternative representations of
different bitrates and segmenting these representations into temporally aligned and
independently encoded segments. This results in a matrix of segments, as depicted
generically in Figure 1.
A content item may consist of several components.
Service discovery procedures refer to a content resource. A content resource consists of one
or more time-sequential periods.
Content item
Nominal playback time
Nominal
Representation 1
Segment n Segment n+1 Segment n+2
data
(e.g. high bitrate)
size
Representation 2
Segment n Segment n+1 Segment n+2
(e.g. medium bitrate)
Representation 2
Segment n Segment n+1 Segment n+2
(e.g. low bitrate)
IEC

Figure 1 – Content segmentation for HTTP adaptive streaming
The Segments are offered for HTTP download from a URL that is unique per segment. After
completion of the download (and playback) of a certain segment of a certain representation, a

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IEC 62766-2-2:2016  IEC 2016 − 11 −
terminal may switch to an alternate representation simply by downloading (and playing) the
next segment of a different representation. This requires the terminal to have a description of
the available representations and segments and the URLs from which to download the
segments. This description is provided as a separate resource, the media presentation
description (MPD).
The media data in a segment are formatted in compliance with the media formats as defined
in IEC 62766-2-1. However, in the context of HTTP adaptive streaming, additional
requirements are put on the usage of these formats, especially regarding the systems layers.
Similarly, the retrieval mechanisms of segments are in compliance with 6.3.2.2 of
IEC 62766-4-1, with the usage in the context of HTTP adaptive streaming as defined in this
document.
IEC 62766-5-1 specifies the initiation of HTTP adaptive streaming from the DAE.
IEC 62766-6 specifies the initiation of HTTP adaptive streaming from the PAE.
This generic model of adaptive streaming is valid for both variants of adaptive streaming
format defined in this standard.
Clause 5 provides the specification of MPEG DASH based adaptive streaming within the OIPF
IPTV solution.
MPEG DASH can be applied also to the delivery of content to mobile devices via mobile data
networks. This is specified by 3GPP in specification 3GPP TS 26.247. Further details on the
use of 3GP-DASH within the OIPF IPTV solution, as an adaptive bit-rate streaming service to
mobile devices, is out of the scope of the present specification.
Clause 6 provides the equivalent specification based on the OIPF HAS format, which is
maintained only for legacy applications.
5 MPEG DASH based adaptive streaming
5.1 General
This clause specifies the preferred format for adaptive bit-rate streaming content, based on
MPEG DASH (ISO/IEC 23009-1).
One of the profiles defined by MPEG DASH is adopted for use for each of the systems layer
formats specified in IEC 62766-2-1, namely MPEG-2 TS and MP4 file format. Subclauses 5.2
...