1、 Reference number ISO 26429-9:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 26429-9 First edition 2009-12-15 Digital cinema (D-cinema) packaging Part 9: Asset mapping and file segmentation Emballage du cinma numrique (cinma D) Partie 9: Cartographie davoir et segmentation de fichier ISO 26429-9:2009(E)
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5、IGHT PROTECTED DOCUMENT ISO 2009 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 ISO at the address below
6、or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 26429-9:2009(E) ISO 2009 All rights reserved ii
7、iForeword 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
8、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 matter
9、s 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 circulat
10、ed to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible
11、 for identifying any or all such patent rights. ISO 26429-9 was prepared by Technical Committee ISO/TC 36, Cinematography. ISO 26429-9 was prepared by the Society of Motion Picture and Television Engineers (as SMPTE 429-9-2007) and was adopted, under a special “fast-track procedure”, by Technical Co
12、mmittee 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 equivalent to SMPTE 429-3 Part 4: MXF JPEG 2000 application equivale
13、nt to SMPTE 429-4 Part 6: MXF track file essence encryption equivalent to SMPTE 429-6 Part 7: Composition playlist equivalent to SMPTE 429-7 Part 8: Packing list equivalent to SMPTE 429-8 Part 9: Asset mapping and file segmentation equivalent to SMPTE 429-9 Part 10: Stereoscopic picture track file e
14、quivalent to SMPTE 429-10 ISO 26429-9:2009(E) iv ISO 2009 All rights reservedIntroduction This part of ISO 26429 comprises SMPTE 429-9-2007 and Annex ZZ (which provides equivalences between ISO standards and SMPTE standards referenced in the text). Table of Contents Page Foreword 2 1 Scope . 3 2 Con
15、formance Notation . 3 3 Normative References . 3 4 Overview 4 4.1 Ingesting a DCP Volume (Informative) 5 4.2 XML File Structure . 5 5 AssetMap Structure 6 5.1 Id 6 5.2 AnnotationText optional . 6 5.3 Creator . 7 5.4 VolumeCount . 7 5.5 IssueDate . 7 5.6 Issuer . 7 5.7 AssetList. 7 6 Asset Structure.
16、 7 6.1 Id 7 6.2 AnnotationText optional . 8 6.3 PackingList optional . 8 6.4 ChunkList . 8 7 Chunk Structure . 8 7.1 Path 8 7.2 VolumeIndex optional 8 7.3 Offsest optional 9 7.4 Length optional. 9 8 VolumeIndex Structure. 9 9 Media-Specific Constraints 9 9.1 Volume Definition. 9 9.2 URL Scheme 9 Pag
17、e 1 of 18 pages SMPTE 429-9-2007 SMPTE STANDARD D-Cinema Packaging Asset Mapping and File Segmentation Approved June 25, 2007 Copyright 2007 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 ISO 26429-9:2009(E) ISO 2009 All rights reserv
18、ed 1SMPTE 429-9-2007 Page 2 of 18 pages 9.3 URL Path . 9 9.4 XML Encoding . 10 9.5 Asset Map Location . 10 9.6 VolumeIndex Location . 10 9.7 Chunk Size 10 10 Asset Map Sample (Informative) . 11 11 Volume Index Sample (Informative) 11 12 XML Schema . 12 Annex A Basic Map Profile (Normative) 14 A.1 UR
19、L Scheme. 14 A.2 URL Path. 14 A.3 XML Encoding. 14 A.4 Asset Map Location. 14 A.5 VolumeIndex Location. 14 A.6 Chunk Size 14 Annex B XML Diagram Legend (Informative) 15 B.1 Element Symbols 15 B.1.1 Examples . 15 B.2 Model Symbols (“Compositors“) . 16 B.3 Types. 16 B.4 Model Groups and References . 1
20、7 Annex C Bibliography (Informative). 18 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 continent
21、s. SMPTEs Engineering Documents, including Standards, Recommended Practices and Engineering Guidelines, are prepared by SMPTEs 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 org
22、anizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in Part XIII of its Administrative Practices. SMPTE 429-9 was prepared by Technology Committee DC28. ISO 26429-9:2009(E) 2 ISO 2009 All rights reservedSMPTE 429-9-2007 Page 3 of 18 page
23、s 1 Scope This document specifies a generic method for mapping a D-Cinema Package (DCP) onto one or more file storage volumes. Data structures are specified which provide for the mapping of D-Cinema asset identifier values onto paths within a particular file storage scheme (e.g., filesystem paths).
24、Where required, assets may be split across multiple storage volumes to allow efficient use of media and the mapping of assets larger than a given storage volumes capacity. The Asset Map and Volume Index structures and the associated provisions detailed herein are intended to provide a framework for
25、simplified mapping of a DCP onto a wide variety of file storage systems. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “shall“, “should“, or “may“. Informative text is text that is potentially
26、 helpful to the user, but not indispensable, and can be removed, changed, or added editorially without affecting interoperability. Informative text does not contain any conformance keywords. All text in this document is, by default, normative, except: the Introduction, any section explicitly labeled
27、 as “Informative“ or individual paragraphs that start with “Note:” The keywords “shall“ and “shall not“ indicate requirements strictly to be followed in order to conform to the document and from which no deviation is permitted. The keywords, “should“ and “should not“ indicate that, among several pos
28、sibilities, one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required; or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited. The keywords “may“
29、 and “need not“ indicate courses of action permissible within the limits of the document. The keyword “reserved” indicates a provision that is not defined at this time, shall not be used, and may be defined in the future. The keyword “forbidden” indicates “reserved” and in addition indicates that th
30、e provision will never be defined in the future. 3 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
31、parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. 1. World Wide Web Consortium (W3C) (2004, February 4). Extensible Markup Language (XML) 1.0 (Third Edition). 2. World Wide Web Consortium (
32、W3C) (2004, October 28). XML Schema Part 1: Structures (Second Edition). 3. World Wide Web Consortium (W3C) (2004, October 28). XML Schema Part 2: Datatypes (Second Edition). 4. Internet Engineering Task Force (IETF) (November 1996) RFC1738 Uniform Resource Locators (URL) 5. Internet Engineering Tas
33、k Force (IETF) (1996, November). RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax 6. Internet Engineering Task Force (IETF) (2005, July). RFC 4122 A Universally Unique Identifier (UUID) URN Namespace. 7. SMPTE 429-8-2007, D-Cinema Packaging Packing List ISO 26429-9:2009(E) ISO 2009 All ri
34、ghts reserved 3SMPTE 429-9-2007 Page 4 of 18 pages 4 Overview D-Cinema content is composed of a number of distinct assets such as Composition Playlists and Track Files. For delivery between systems, these assets are combined into logical D-Cinema Packages (DCP). A DCP is a single delivery unit defin
35、ed by a Packing List document SMPTE 429-8. The Packing List enumerates all the assets included in the DCP, and provides information necessary for a traceable and error-free delivery. The DCP and its Packing List are specified independently of any media or file storage scheme. The Packing List contai
36、ns the UUID identifiers of the assets in the package, not the location of those assets on some volume of media. The Asset Map provides the link between the asset identifier UUIDs and the files containing the assets. This layered approach has two distinct advantages. First, it simplifies specificatio
37、n of the Packing List by removing dependence on past, current or future media formats and constraints. Second, it allows the DCP and its underlying assets to be created once and mapped onto various target media as circumstances require. The Asset Map structure, depicted in Figure 1 below, provides a
38、 mapping from the Packing List asset Ids to actual file locations within the file storage scheme. An Asset Map may contain mappings for more than one DCP, but shall not contain a partial mapping for a particular DCP. A DCP shall not span multiple Asset Maps. The Asset Map provides special identifica
39、tion for Packing List assets so that they may be located without scanning the entire volume. A DCP storage volume (a distinct container of files) shall contain exactly one Asset Map. In a multi-volume mapping, a single Asset Map shall contain the complete mapping for all volumes, and shall be repeat
40、ed on each volume. A Volume Index structure (defined in Section 8 below) shall be used to identify each volume in a multi-volume set. Assets may be divided into multiple segments to allow spanning across multiple volumes (segmentation). The segments are called “chunks”, and are stored in files, with
41、out additional structure. An Asset may be recreated by concatenating the constituent chunk files. Figure 1 Relationship between the Packing List and Asset Map structures ISO 26429-9:2009(E) 4 ISO 2009 All rights reservedSMPTE 429-9-2007 Page 5 of 18 pages The definition of “volume” and the means of
42、identifying the Asset Map on a volume shall be defined by a normative DCP Map Profile (see Section 9 “Media-Specific Constraints” below) for that media type. DCP Map Profiles shall normatively reference this document and shall follow the provisions of this document except where explicitly noted. 4.1
43、 Ingesting a DCP Volume (Informative) The process of reading a DCP into a D-Cinema system is termed Ingest. A system may provide a simple or elaborate ingest control interface - allowing coarse or fine-grained selection of items to be ingested but the basic process of discovering the contents of a v
44、olume will always be the same. As illustrated using pseudo-code in Figure 2 below, a DCP storage volume is ingested by first opening the Asset Map document on that volume. The means of identifying the Asset Map on the volume is defined by the normative DCP Map Profile (see Section 9) for that media
45、type. The Asset Map is used to locate the Packing List(s) which detail the contents of the available DCP(s). Assets are chosen from the Packing List(s), and the selected assets are ingested by using the Asset Map to locate the chunks of data on the storage volume. The chunks are concatenated to rest
46、ore the original file. (This example does not illustrate multi-volume ingest). Ingest DCP volume: open the Asset Map for each Packing List in the Asset Map open the Packing List for each Asset in the Packing List if this Asset is wanted locate the corresponding Asset structure in the Asset Map for e
47、ach chunk in the Asset structure read the chunk data write to destination test the message digest Figure 2 Example ingest process 4.2 XML File Structure The structures defined in this document are represented using the Extensible Markup Language (XML) XML 1.0, and specified using XML Schema XML Sche
48、ma 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- 9/2007/AM”. This namespace name conveys both structural and semantic ve
49、rsion information, but does not serve 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 1 . 1Readers unfamiliar with URI values as XML namespace names should be aware that although a URI value begins with a “method” element (“http” in this case), the value is designed primarily to be a unique string and does not necessarily
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