SMPTE EG 42-2015 Material Exchange Format (MXF) - MXF Descriptive Metadata.pdf
《SMPTE EG 42-2015 Material Exchange Format (MXF) - MXF Descriptive Metadata.pdf》由会员分享,可在线阅读,更多相关《SMPTE EG 42-2015 Material Exchange Format (MXF) - MXF Descriptive Metadata.pdf(26页珍藏版)》请在麦多课文档分享上搜索。
1、 Copyright 2015 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved August 30, 2015 Table of Contents Page Foreword . 2 Introduction 2 1 Scope . 4 2 References . 4 3 Glossary of Acronyms, Terms and Data Types . 4 4 Relating Descri
2、ptive Metadata to Essence 5 5 Metadata Coding 9 6 Guide for Implementing Descriptive Metadata Schemes in MXF 11 7 Operational Considerations 12 Annex A Descriptive Metadata Characteristics (Informative) 13 Annex B Metadata Modeling (Informative). 17 Annex C XML-Schema Implementation (Informative) .
3、24 Annex D Bibliography (Informative) 26 Page 1 of 26 pages SMPTE EG 42:2015 Revision of EG 42-2004 SMPTE ENGINEERING GUIDELINE Material Exchange Format (MXF) MXF Descriptive Metadata SMPTE EG 42:2015 Page 2 of 26 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an in
4、ternationally-recognized standards developing organization. Headquartered and incorporated in the United States of America, SMPTE has members in over 80 countries on six continents. SMPTEs Engineering Documents, including Standards, Recommended Practices and Engineering Guidelines, are prepared by S
5、MPTEs 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 its
6、 Standards Operations Manual. SMPTE EG 42 was prepared by Technology Committee 31FS. Introduction This guideline is entirely informative and intended to provide guidance for implementing descriptive metadata within the header metadata of an MXF file SMPTE ST 377-1. This guideline supplements the MXF
7、 Engineering Guideline SMPTE EG 377-3. This guideline is divided into a number of core sections, each section describing a particular aspect of descriptive metadata. The sections (together with their section number) are as follows: This introduction including the usage of descriptive metadata and us
8、er requirements for descriptive metadata. Section 4: The mechanisms by which descriptive metadata in the MXF header metadata can be linked to the essence in the MXF essence container. Section 5: How to implement descriptive metadata as a sequence of KLV packets in the MXF header metadata and as XML
9、for text-based interfacing. Section 6: Guidance for implementing both MXF descriptive metadata and non-MXF descriptive metadata. Section 7: Considerations for handling descriptive metadata in special operational circumstances. Annex A: Provides a discussion of metadata characteristics. Annex B: Prov
10、ides an introduction to data modeling techniques. Annex C: Provides an example of the options for XML coding. Annex D: Bibliography Dimensions of Descriptive Metadata Use In general terms, the use of descriptive metadata has many dimensions as follows: 1. It is in widespread use within different con
11、tent-based industries, including broadcast, film, music and web authoring. 2. It is in widespread use within different content-based applications, including capture/creation, production, post-production and archive/libraries. SMPTE EG 42:2015 Page 3 of 26 pages 3. It can be divided into several diff
12、erent broad categories including business transactions, publication information, content identification and labeling, compositional information and formatting, etc. 4. It can have different states such as being static for a defined duration, being dynamic (with several kinds of dynamic states includ
13、ing transitory, metronomic, incrementing and so on). 5. It can have different levels of stability with elements having durable values that remain stable or transient values that frequently change. In the header metadata of an MXF file, the metadata is persisted and can be distributed over many copie
14、s. Thus descriptive metadata in an MXF file ought to include only that metadata which can be considered copy persistent. This does not mean that a value can never change between copies, but that, once written, individual copies will have to be edited where changes are required. For some types of met
15、adata, this is not only acceptable, but encouraged, e.g. a property that defines the number of copies made. One of the primary aims of this document is to identify that metadata which can be used to enhance the description of the content in a file. Metadata that is appropriate for use in databases i
16、s not considered in this guideline. Annex A describes metadata characteristics that can aid the reader to understand the attributes of different kinds of metadata items. User Requirements for Descriptive Metadata Many major content production facilities have custom methods for handling the descripti
17、ve metadata associated with the content. As audio-visual content exchange moves from tape-based to file-based operations, the opportunity arises to be able to both embed descriptive metadata in the file and to provide an intimate relationship between the metadata and the audio-visual content. This p
18、rocess allows metadata to be accrued within a file as it passes between operations in a way that has rarely before been achieved. Many users see the ability to embed metadata into an MXF file as a key requirement that extends the use of MXF beyond that primarily for the simple exchange of audio-visu
19、al content. SMPTE EG 42:2015 Page 4 of 26 pages 1 Scope The MXF standard SMPTE ST 377-1 provides for descriptive metadata schemes as “plug-ins” to the MXF header metadata. This guideline is intended to provide guidance for the use of MXF descriptive metadata schemes. This guideline is a supplement t
20、o SMPTE EG 377-3. This guideline explains the common structural metadata components by which all MXF descriptive metadata schemes can be related to the essence they describe. Additional constraints required for MXF descriptive metadata schemes are also described. This guideline describes how MXF des
21、criptive metadata is related to the essence using the structural metadata defined in SMPTE ST 377-1. It also describes how MXF descriptive metadata is coded as KLV data for use in MXF files and as XML for text-based metadata exchange. This guideline also provides guidance for implementing MXF descri
22、ptive metadata schemes. Descriptive metadata is a complex topic and requires at least some basic understandings of the various attributes of descriptive metadata together with data modeling techniques. This guideline provides annexes that summarize these topics. 2 References Note: All references in
23、this document to other SMPTE documents use the current numbering style (e.g. SMPTE ST 336:2007) although, during a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 336M-2007). Documents with the same root number (e.g. 336) and publication ye
24、ar (e.g. 2007) are functionally identical. The following documents contain information used in this guideline. At the time of publication, the editions indicated were valid. All standards are subject to revision, and readers of this guideline are encouraged to investigate the possibility of applying
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- SMPTEEG422015MATERIALEXCHANGEFORMATMXFMXFDESCRIPTIVEMETADATAPDF

链接地址:http://www.mydoc123.com/p-1046286.html