ISO 26429-7:2008
(Main)Digital cinema (D-cinema) packaging — Part 7: Composition playlist
Digital cinema (D-cinema) packaging — Part 7: Composition playlist
ISO 26429-7:2008 specifies the Composition Playlist structure. The Composition Playlist is a self-contained representation of a single complete digital cinema work, e.g. a motion picture, a trailer or an advertisement. The Composition Playlist consists of an ordered sequence of Reel structures, each referencing a set of external Track Files, e.g. a sound or picture Track File, which are meant to be reproduced in parallel. Each Reel is analogous to a film reel and the Composition Playlist controls the order and timing of the playout of the Reels.
Emballage du cinéma numérique (cinéma D) — Partie 7: Liste d'écoute de composition
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 26429-7
First edition
2008-09-01
Digital cinema (D-cinema) packaging —
Part 7:
Composition playlist
Emballage du cinéma numérique (cinéma D) —
Partie 7: Liste d'écoute de composition
Reference number
ISO 26429-7:2008(E)
©
ISO 2008
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ISO 26429-7:2008(E)
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ISO 26429-7:2008(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
ISO 26429-7 was prepared by the Society of Motion Picture and Television Engineers (as
SMPTE 429-7-2006) and was adopted, under a special “fast-track procedure”, by Technical Committee
ISO/TC 36, Cinematography, in parallel with its approval by the ISO member bodies.
ISO 26429 consists of the following parts, under the general title Digital cinema (D-cinema) packaging:
⎯ Part 3: Sound and picture track file
⎯ Part 4: MXF JPEG 2000 application
⎯ Part 6: MXF track file essence encryption
⎯ Part 7: Composition playlist
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ISO 26429-7:2008(E)
Introduction
This International Standard comprises SMPTE 429-7-2006 and the following informative notes.
⎯ Table 2 (Content Kind): Business arrangements by national practice determine what is inclusive in the
definition of a “feature”.
⎯ Table 4 (Standard Marker Labels): An additional marker called “First Frame Lights On” (FFLO), which
could be used by the production company to indicate an appropriate position within the end credits to turn
on the lights, is optionally available and has been proposed for incorporation into SMPTE 429-7.
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent.
ISO takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured ISO that he is willing to negotiate licences under reasonable and
non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of
the holder of this patent right is registered with ISO. Information may be obtained from:
Eastman Kodak Company
Intellectual Property Transactions
343 State Street
Rochester, NY 14650
USA
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights other than those identified above. ISO shall not be held responsible for identifying any or all such patent
rights.
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
SMPTE STANDARD
D-Cinema Packaging —
Composition Playlist
Page 1 of 30 pages
Table of Contents Page
1 Scope . 3
2 Normative References . 3
3 Overview . 4
4 Terminology . 5
5 Synchronization. 6
6 CompositionPlaylist Structure . 7
6.1 Id . 7
6.2 AnnotationText [optional] . 7
6.3 IconId [optional]. 8
6.4 Issue Date. 8
6.5 Issuer [optional]. 8
6.6 Creator [optional]. 8
6.7 ContentTitleText. 8
6.8 ContentKind . 8
6.9 ContentVersion . 9
6.10 RatingList . 10
6.11 ReelList . 10
6.12 Signer [optional] . 10
6.13 Signature [optional] . 11
7 Reel Structure . 11
7.1 Id . 12
7.2 AnnotationText [optional] . 12
7.3 AssetList. 12
8 Asset Structure. 13
8.1 GenericAssetType. 13
8.2 TrackFileAssetType . 15
8.3 MarkerAssetType. 16
8.4 PictureTrackFileAssetType . 18
8.5 SoundTrackFileAssetType. 19
8.6 SubtitleTrackFileAssetType . 19
9 CPL Constraints. 20
9.1 Content Markers. 20
9.2 Minimum Reel Duration . 21
Copyright © 2006 by THE SOCIETY OF Approved
MOTION PICTURE AND TELEVISION ENGINEERS
October 3, 2006
3 Barker Avenue, White Plains, NY 10601
(914) 761-1100
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
10 XML Schema .22
11 Sample (Informative) .26
12 XML Diagram Legend (Informative) .27
12.1 Element symbols .27
12.2 Model symbols ("compositors") .28
12.3 Types.28
12.4 Model groups and references.29
Annex A Bibliography (Informative).30
Foreword
SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards
developing organization. Headquartered and incorporated in the United States of America, SMPTE has
members in over 80 countries on six continents. SMPTE’s Engineering Documents, including Standards,
Recommended Practices and Engineering Guidelines, are prepared by SMPTE’s Technology Committees.
Participation in these Committees is open to all with a bona fide interest in their work. SMPTE cooperates
closely with other standards-developing organizations, including ISO, IEC and ITU.
SMPTE Engineering Documents are drafted in accordance with the rules given in Part XIII of its
Administrative practices.
Proposed SMPTE Standard 429-7 was prepared by Technology Committee DC28.
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
1 Scope
This document specifies the Composition Playlist structure. The Composition Playlist is a self-contained
representation of a single complete D-Cinema work, such as a motion picture, or a trailer, or an
advertisement, etc. The Composition Playlist consists of an ordered sequence of Reel structures, each
referencing a set of external Track Files, e.g. a sound or picture Track File, which are meant to be reproduced
in parallel. Each Reel is analogous to a film reel and the Composition Playlist controls the order and timing of
the playout of the Reels.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this
standard. At the time of publication, the editions indicated were valid. All standards are subject to revision,
and parties to agreements based on this standard are encouraged to investigate the possibility of applying the
most recent edition of the standards indicated below.
World Wide Web Consortium (W3C) (2004, February 4). Extensible Markup Language (XML) 1.0 (Third
Edition).
World Wide Web Consortium (W3C) (2004, October 28). XML Schema Part 1: Structures (Second Edition).
World Wide Web Consortium (W3C) (2004, October 28). XML Schema Part 2: Datatypes (Second Edition).
World Wide Web Consortium (W3C) (2002, February 12). XML-Signature Syntax and Processing.
Internet Engineering Task Force (IETF) (1996, November). RFC 2045 – Multipurpose Internet Mail
Extensions (MIME) Part One: Format of Internet Message Bodies.
Internet Engineering Task Force (IETF) RFC2046 (November 1996) Multipurpose Internet Mail Extensions
(MIME) Part Two: Media Types.
Internet Engineering Task Force (IETF) (1996, November). RFC 2396 – Uniform Resource Identifiers (URI):
Generic Syntax.
Internet Engineering Task Force (IETF) (2001, September). RFC 3174 – US Secure Hash Algorithm 1 (SHA-
1).
Internet Engineering Task Force (IETF) (1997, May) RFC 2141 – URN Syntax.
Internet Engineering Task Force (IETF) (2001, April) RFC 4051 – Additional XML Security Uniform Resource
Identifiers (URIs).
Internet Engineering Task Force (IETF) (2005, July). RFC 4122 – A Universally Unique Identifier (UUID) URN
Namespace.
Page 3 of 30 pages
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
3 Overview
A composition, depicted in Figure 1, is a self-contained representation of a single complete D-Cinema work,
such as a motion picture, or a trailer, or an advertisement, etc. It tangibly consists of a Composition Playlist
file and one or more track files which contain the actual essence. Specifications of track file formats are
beyond the scope of this document.
A Composition Playlist (CPL) is a document which specifies the manner in which track files are rendered. A
CPL represents a composition as an ordered sequence of Reels. Each Reel contains one or more Assets,
which identify Track File segments to be reproduced in parallel. In other words, it specifies the assembly of
track files both in parallel, e.g. sound with picture, and in sequence; e.g., Reel 2 after Reel 1. The
Composition Playlist is typically created under editorial control in the mastering environment and is then
included in the D-Cinema package distributed to exhibition.
Composition Playlist
Reel 1 Reel 2 Reel 3
Main Picture Asset #1 Main Picture Asset #2 Main Picture Asset #3
Main Sound Asset #1 Main Sound Asset #2 Main Sound Asset #3
Main Subtitle Asset #1 Main Subtitle Asset #2 Main Subtitle Asset #3
Subtitle Subtitle Subtitle
Track
Track Track
File #1
File #2 File #3
Picture Picture Picture
Track
Track Track
File #1 File #2 File #3
Sound
Sound Sound
Track File Track File Track File
#1
#2 #3
Figure 1 – Prototypical Composition Playlist
The structures defined in this document are represented using the Extensible Markup Language (XML) [XML
1.0], and specified using XML Schema [XML Schema Part 1: Structures] and [XML Schema Part 2:
Datatypes]. This specification shall be associated with a unique XML namespace name [Namespaces in
XML]. The namespace name shall be the string value “http://www.smpte-ra.org/schemas/429-
7/2006/CPL“. This namespace name conveys both structural and semantic version information, and serves
the purpose of a traditional version number field.
Table 1 lists the XML namespace names used in this specification. Namespace names are represented as
Uniform Resource Identifier (URI) values [RFC 2396]. These values shall be considered as simple strings,
and applications should not attempt to resolve them as URLs.
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
Table 1 – XML Namespaces
Qualifier URI
cpl http://www.smpte-ra.org/schemas/429-7/2006/CPL
xs http://www.w3.org/2001/XMLSchema
ds http://www.w3.org/2000/09/xmldsig
The namespace qualifier values (namespace prefixes in XML jargon) used in this document (cpl, xs, ds),
are not normative values. Implementations shall perform correctly with any XML compliant namespace prefix
value that is associated with a URI from table 1.
Datatypes from other schemas that are used in this document will be prefixed with the appropriate
namespace qualifier (e.g., xs:dateTime). See [XML Schema Part 2: Datatypes] and [XML-Signature Syntax
and Processing] for further information about these types.
The MIME type [IETF RFC 2046] for a document containing a single Composition Playlist element as its root
shall be “text/xml“.
4 Terminology
The following terms are used to describe the features of this standard.
Clip: A contiguous set of Editable Units intended to be reproduced sequentially.
Composition: A complete artistic or informational motion picture work, such as a feature, or a trailer, or an
advertisement, etc.
Editable Unit: The smallest temporal increment of access to Essence, e.g. a frame or a sample.
Edit Rate: A number of Editable Units to be reproduced during a temporal interval having a duration of
exactly one (1.0) second. Because Edit Rate values are not always integer values and sometimes require
many digits of precision, Edit Rate values are expressed as a rational number (the ratio of two integers).
Essence: The sound, picture and data resources that make up a Composition.
Native Duration: The total number of Editable Units in a Track File.
Native Start Point: The first Editable Unit of a Track File. All Track Files are viewed by a Composition
Playlist as a sequence of Editable Units numbered from 0 (zero). Consequently, the Editable Unit number of
the Native Start Point of a Track File will always be 0 (zero).
Native End Point: The last Editable Unit of a Track File.
Playable Region: The set of Editable Units within a Track File that are intended to be reproduced as part of
a Composition. A Track File may contain Editable Units before and/or after the Playable Region.
Track File: A file containing a single Clip of simple Essence, such as sound, picture or subtitle essence.
Sample Rate: The number of essence samples per second. Sample Rate values are expressed as a rational
number (the ratio of two integers).
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ISO 26429-7:2008(E)
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Frame Rate: The number of frames per second. Frame Rate values are expressed as a rational number (the
ratio of two integers).
Rational Number: A number value that is expressed as the ratio of two integers. This provides for the
definition of precise values that are not subject to the inaccuracies of floating point representation.
5 Synchronization
The Composition Playlist defines an idealized playback timeline. As depicted in Figure 2, the timeline consists
of a sequence of contiguous Reels. A Reel defines a temporal segment of the composition and consists of a
set of single-essence Assets.
start of Composition end of Composition
Reel 1 Reel n
Figure 2 – Composition timeline
An Asset identifies a segment of a Track File to be reproduced in parallel with the other Assets in the same
Reel. The Asset’s Entry Point and Duration parameters define the sequence of Editable Units within the
Track File that is to be reproduced (the Playable Region). For a given time offset T from the start of the Reel,
the corresponding time offset T within a Track File F shall be equal to (EntryPoint / EditRate ) + T. Editable
n F F
Units across Track Files aligned with the same time offset T are synchronized and shall be reproduced
simultaneously. Figure 3 illustrates the timing relationship between Assets within a Reel.
start of Reel
end of Reel
T
T MainPicture Asset
1
Entry Point
T MainSound Asset
2
T MainSubtitle Asset
3
Figure 3 – Timing relationships within a Reel
At the start of a given Reel, playback of all Assets contained within the Reel shall start simultaneously at the
Entry Point given for each respective Track File. The duration of a Reel shall be equal to the duration of the
Reel’s MainPicture Asset, or the Asset with the shortest duration if the MainPicture Asset is not present.
The Assets within each Reel shall be in editorial sync. In other words, the Composition Playlist timeline shall
1
not compensate for any processing delay that may occur in the exhibition environment, such as the internal
image processing delay in a projector, and shall reflect the same time relationships the editor intended the
audience to observe in exhibition.
1
Any compensation for essence delay through the exhibition equipment is to be applied in-theatre, not in the
mastering process. Such compensation may be applied by the digital cinema playback system, the cinema
sound processor, or some other device.
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
6 CompositionPlaylist Structure
As depicted in Figure 4, a Composition Playlist shall be represented by a unique XML element, the
CompositionPlaylist element. The Composition Playlist shall be encoded using the UTF-8 character
encoding [XML 1.0].
The CompositionPlaylist element is defined using XML Schema in Section 10. The CompositionPlaylist
element is illustrated in Figure 4 and the individual elements that comprise the CompositionPlaylist
element are defined in the remaining sub-sections.
Figure 4 – CompositionPlaylist structure (Dotted lines denote optional elements)
6.1 Id
The Id element uniquely identifies the Composition Playlist for asset management purposes. It shall not
uniquely identify the content represented by the composition – see Section 6.9. It shall be encoded as a
urn:uuid per [RFC 4122].
6.2 AnnotationText [optional]
The AnnotationText element shall be a free-form, human-readable annotation describing the composition.
It is meant strictly as a display hint to the user. The optional language attribute is an xs:language language
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ISO 26429-7:2008(E)
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code and indicates the language used for the text. If the language attribute is not present, the default value en
shall be used.
6.3 IconId [optional]
The IconId element uniquely identifies an external image resource containing a picture icon illustrating the
composition. The icon may be rendered, for instance, from a frame of the underlying content. The IconId
element shall be encoded as a urn:uuid per [RFC 4122]. The mapping of UUID values to actual image
resources is beyond the scope of this document.
6.4 IssueDate
The IssueDate element shall be used to define the time and date at which the Composition Playlist was
issued. It may be displayed to the user. It shall be encoded as an xs:dateTime.
6.5 Issuer [optional]
The Issuer element shall be a free-form, human-readable annotation that shall identify the entity that
created the Composition Playlist. It is meant strictly for display to the user. The optional language attribute is
an xs:language language code and indicates the text language of the content of the element. If the
language attribute is not present, the default value en shall be used.
6.6 Creator [optional]
The Creator element shall be a free-form, human-readable annotation that shall identify the application
used to create the Composition Playlist. It is meant strictly for display to the user. The optional language
attribute is an xs:language language code and indicates the text language of the content of the element. If
the language attribute is not present, the default value en shall be used.
6.7 ContentTitleText
The ContentTitleText element shall contain a human-readable title for the composition, e.g. The Jazz
Singer. It is strictly meant as a display hint to the user. The optional language attribute is an xs:language
language code and indicates the language of the content of the element. If the language attribute is not
present, the default value en shall be used.
6.8 ContentKind
The ContentKind element defines the kind of material referred to by the Composition Playlist. It is meant to be
both human and machine-readable. An optional scope attribute with default URI value http://www.smpte-
ra.org/schemas/429-7/2006/CPL#standard-content determines the permissible values of the element.
If the scope attribute is absent, or set to its default value, the content of the element shall match one of the
values listed in Table 2; otherwise the content of the element is outside the scope of this specification but may
be displayed to the user.
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ISO 26429-7:2008(E)
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Table 2 – Content Kind
Kind Description
feature A theatrical feature.
trailer Short (2 to 3 minutes) content promoting an upcoming
theatrical feature.
test Content used to test, calibrate or setup D-Cinema
exhibition equipment.
teaser Very short (typically less than 1 minute) content
promoting an upcoming theatrical feature.
Slate/still picture indicating the recommended age
rating
group permitted to view the content to follow. This
rating is generally unique per country.
advertisement Content promoting a product or service other than an
upcoming feature.
short Non advertising/promotional content (3 to 15 minutes)
typically before a theatrical feature.
transitional Extremely short content (1 to 15 seconds) separating
unrelated compositions.
psa
Public service announcement.
policy
Content defining the code of conduct for patrons.
6.9 ContentVersion
The ContentVersion element defines the version of the content referred to by the composition, as opposed
to the Composition Playlist Id element (Section 6.1) which uniquely identifies an instance of the Composition
Playlist. Thus there may be two distinct compositions, with distinct CompositionPlaylist Id (Section 6.1)
values, that refer to the same content and thus have the same ContentVersion Id value. This may occur,
for example, if a composition is distributed to supercede a previous version. Similarly, while two compositions
may share the same content title (Section 6.7), they may refer to two different versions, such as French
(dubbed) and French (original), and therefore have two distinct ContentVersion Id values.
The ContentVersion element is meant to assist both users and software in scheduling and tracking
content.
As shown in Figure 5, the ContentVersion element contains an Id element and a LabelText element,
which are described in the following subsections.
Figure 5 – ContentVersion structure (Dotted lines denote an optional element)
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ISO 26429-7:2008(E)
SMPTE 429-7-2006
6.9.1 Id
The Id element shall identify the content contained in the Composition Playlist. It shall be a valid URN, per
[RFC 2141].
6.9.2 LabelText
The LabelText element shall be a human readable label, e.g. “French (1.85 picture, 5.1 sound, dubbed)”,
describing the content. The optional language attribute is an xs:language language code
...
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