SMPTE ST 330-2011 Unique Material Identifier (UMID)《唯一素材标识符(UMID)》.pdf

1、 Copyright 2011 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved August 23, 2011 Table of Contents Page Foreword 2Intellectual Property . 2Introduction 21 Scope 32 Conformance Notation 33 Normative References 44 Glossary of Ter

2、ms 45 General Specification . 56 UMID Format Specification 66.1 Basic UMID . 66.2 Extended UMID . 106.3 Source Pack 10Annex A Generation of UMID Material Numbers (Normative) . 19 A.1 SMPTE Method (01h) . 19A.2 UUID/UL Method (02h) . 20A.3 Masked Method (03h) . 20A.4 IEEE 1394 Network Method (04h) 21

3、Annex B Generation of UMID Instance Numbers (Normative) . 23B.1 Local Registration (1h) 23B.2 24-Bit PRS Generator (2h) 23B.3 Copy Number and 16-Bit PRS Generator (3h) . 23B.4 Live Stream (Fh) . 23Annex C Text Representation of the UMID (Normative) 24C.1 Legacy Text Format Definition . 24Annex D Doc

4、umentation of Legacy UMID Generation (Informative) . 25D.1 First 16 Bytes 25D.2 Second 16 Bytes 25Annex E Bibliography (Informative) 26Page 1 of 26 pages SMPTE ST 330:2011 Revision of SMPTE 330M-2004 SMPTE STANDARD Unique Material Identifier (UMID) SMPTE ST 330:2011 Page 2 of 26 pages Foreword SMPTE

5、 (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. SMPTEs Engineering Documents, including Standards, R

6、ecommended 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 organizations, including ISO, IEC and ITU. SMPTE Engineer

7、ing Documents are drafted in accordance with the rules given in Part XIII of its Administrative Practices. SMPTE ST 330 was prepared by Technology Committee 30MR. Intellectual Property SMPTE draws attention to the fact that it is claimed that compliance with this Standard may involve the use of one

8、or more patents or other intellectual property rights (collectively, “IPR“). The Society takes no position concerning the evidence, validity, or scope of this IPR. Each holder of claimed IPR has assured the Society that it is willing to License all IPR it owns, and any third party IPR it has the rig

9、ht to sublicense, that is essential to the implementation of this Standard to those (Members and non-Members alike) desiring to implement this Standard under reasonable terms and conditions, demonstrably free of discrimination. Each holder of claimed IPR has filed a statement to such effect with SMP

10、TE. Information may be obtained from the Director, Standards and An extended UMID, which attaches a packed metadata set (source pack) to the basic UMID. This standard specifies the formats of each component in both the basic UMID and the extended UMID. This standard also identifies and specifies met

11、hods by which the components of the identifier can be created. A glossary is provided to define the terms used in this standard and this scope. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “s

12、hall“, “should“, or “may“. Informative text is text that is potentially 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 defau

13、lt, normative, except: the Introduction, any section explicitly labeled 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. T

14、he keywords, “should“ and “should not“ indicate that, among several possibilities, 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 o

15、r course of action is deprecated but not prohibited. The keywords “may“ 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 key

16、word “forbidden” indicates “reserved” and in addition indicates that the provision will never be defined in the future. A conformant implementation according to this document is one that includes all mandatory provisions (“shall“) and, if implemented, all recommended provisions (“should“) as describ

17、ed. A conformant implementation need not implement optional provisions (“may“) and need not implement them as described. Unless otherwise specified, the order of precedence of the types of normative information in this document shall be as follows: Normative prose shall be the authoritative definiti

18、on; Tables shall be next; followed by formal languages; then figures; and then any other language forms. SMPTE ST 330:2011 Page 4 of 26 pages 3 Normative References Note: All references in this document to other SMPTE documents use the current numbering style (e.g. SMPTE ST 298:2009) although, durin

19、g a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 298-2009). Documents with the same root number (e.g. 298) and publication year (e.g. 2009) are functionally identical. The following standards contain provisions which, through reference i

20、n 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 editions of the standa

21、rds indicated below. SMPTE ST 298:2009, Universal Labels for Unique Identification of Digital Data SMPTE ST 12-1:2008, Time and Control Code SMPTE ST 309:1999, Television Transmission of Date and Time Zone Information in Binary Groups of Time and Control Code SMPTE ST 2029:2009, Uniform Resource Nam

22、es for SMPTE Resources SMPTE ST 336:2007, Data Encoding Protocol Using Key-Length-Value SMPTE RP 210, Metadata Dictionary Registry of Metadata Element Descriptions AES3-2009, AES Standard for Digital Audio Engineering Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data

23、 IEEE 1394-1995, High Performance Serial Bus ISO 3166-1:2006, Codes for the Representation of Names of Countries and Their Subdivisions Part 1: Country Codes ISO/IEC 8859-1:1998, Information Technology 8-Bit Single-Byte Coded Graphic Character Sets Part 1: Latin Alphabet No. 1 IETF RFC 4122:2005, A

24、Universally Unique Identifier (UUID) URN Namespace DMA TR 8350.2, Department of Defense, World Geodetic System 1984. U.S. Defense Mapping Agency DMA TR 8350.2, Second Edition, 1 September 1991 4 Glossary of Terms audio-visual material: Any one or any combination of picture (or video) essences, sound

25、 (or audio) essences and data (or auxiliary) essences. This term is also frequently referred to simply as “material”. dumb number: A number, the value of which has no intrinsic meaning. essence: An abstract term that describes any data or signal necessary to represent any single type of visual, aura

26、l or other sensory experience independent of the method of coding. Essence excludes any form of metadata. material unit: The entity that represents the quantum of the audiovisual material defined by its cyclic sampling structure. The material unit duration depends on the type of material; examples b

27、eing an AES3 block and a video frame. Note that the duration of a material unit is defined by the requirements of the audiovisual material type and its application. The value of the material unit duration is not specified in the basic UMID. It can, however, be specified in the source pack. SMPTE ST

28、330:2011 Page 5 of 26 pages metadata: Data which conveys information about the audio-visual material. For example, information about identification, essence coding, timelines, intellectual property, business operations, etc. 5 General Specification A unique material identifier (UMID) provides for th

29、e globally unique identification of any audiovisual material. This standard defines a dual approach through the specification of a basic UMID and an extended UMID. The basic UMID provides a globally unique identification for audiovisual material that comprises an integer number of one or more contig

30、uous material units. The basic UMID has no embedded mechanism to distinguish between individual material units within a single instance of audiovisual material. The data in the basic UMID can be created through automatic generation. The extended UMID comprises the basic UMID followed immediately by

31、a source pack that provides a signature for material units. The source pack comprises a fixed length metadata pack of 32 bytes that provides sufficient metadata by which source “when, where and who (or what)” information can be identified regardless of current ownership or status. The extended UMID

32、also provides a mechanism to distinguish between individual material units within a single instance of audiovisual material. The basic UMID is 32 bytes long and the extended UMID is 64 bytes long. Both UMID types use the key-length-value construct defined by SMPTE ST 336. The key is a 16-byte univer

33、sal label truncated to 12 bytes. In the case of the basic UMID, the length field has a value of 13h and the value is formed by the combination of a material number and an instance number. In the case of the extended UMID, the length field has a value of 33h and the value is formed by the combination

34、 of the material and the instance numbers followed by the source pack. All components of the UMID have a defined byte order for consistent application in storage and streaming environments. Figure 1 illustrates the layout of the both basic UMID and the extended UMID. Figure 1 Basic and extended UMID

35、 structures The components of the basic UMID are: 1. A 12-byte universal label, 2. A 1-byte length value, 3. A 3-byte instance number, and 4. A 16-byte material number. The combination of the instance and material numbers can be treated as a dumb number. Note: The material number does not indicate t

36、he status of the material (such as copy number) or its representation (such as the compression kind). The material number can be identical in copies and in different representations of the material. The purpose of the instance number is to separately identify different representations or instances o

37、f audiovisual material. Thus, for example, a high-resolution picture and a thumbnail can both have the same SMPTE ST 330:2011 Page 6 of 26 pages material number because they both represent the same picture but, because they are different instances, they will have different instance numbers for the d

38、ifferent representations. Guidance for the consistent application of new material numbers and instance numbers is given in SMPTE RP 205. The extended UMID comprises a basic UMID, followed by a source pack. The components of the source pack are: 1. An 8-byte date stamp and unit count component, 2. A

39、12-byte geospatial coordinate, 3. A 4-byte country code, 4. A 4-byte organization code, and 5. A 4-byte originator code. Notes: 1. The source pack metadata only represents that information available at the time when the extended UMID is first applied. The source pack values therefore refer to the “w

40、hen, where and who (or what)” at the point of application of the source pack and this can differ from the originating device. 2. All metadata fields in the source pack can be automatically generated for each material unit using a timer, a global position calculator and pre-registered identification

41、data. Where automatic generation of any value is not possible, it can be manually entered. 3. The source pack needs to be registered in a Metadata Groups Register. 4. The terms origination and originator above refer to physical origination and have no meaning in terms of intellectual property. 6 UMI

42、D Format Specification Section 6.1 defines the basic UMID, Section 6.2 defines the extended UMID, and Section 6.3 defines the source pack. Number formats including the material and instance numbers together with the date/time and geospatial coordinate fields shall be presented with the least signifi

43、cant byte first (also known as little-endian byte order) unless otherwise defined. 6.1 Basic UMID 6.1.1 Structure of the Basic UMID The basic UMID shall be 32 bytes long, and shall contain a 12-byte universal label, a length, an instance number, and a material number in this order with each item as

44、defined below. 6.1.2 12-Byte Universal Label The 12-byte universal label defines the type of material, which the UMID identifies and the methods by which the material number and instance number are created. The first 12 bytes of the UMID shall identify the UMID with a SMPTE universal label as define

45、d by SMPTE ST 298 having the registered string value defined in Table 1. SMPTE ST 330:2011 Page 7 of 26 pages Table 1 UMID univeral label Byte No. Description Value (hex) Meaning 1 Object identifier 06h Universal label start 2 Label size 0Ah 12-byte Universal label 3 Designation: ISO 2Bh ISO registe

46、red 4 Designation: SMPTE 34h SMPTE registered 5 Registry category 01h Dictionaries 6 Specific category 01h Metadata dictionaries 7 Structure 01h Dictionary standard (SMPTE ST 335) 8 Version number 05h Version of the metadata dictionary (defined in SMPTE RP 210) 9 Class 01h Identifiers and locators 1

47、0 Subclass 01h Globally unique identifiers 11 Material type XXh See Section 6.1.2.1 12 Number creation method YYh See Section 6.1.2.2 Note: SMPTE ST 298 defines SMPTE labels as having a length of 16 bytes. The 12-byte UMID universal label is still a valid and unique ISO object identifier as defined

48、in SMPTE ST 298. When the UMID universal label is used in isolation, the 12-byte UMID universal label can be converted to a SMPTE label by padding with 4 bytes of null fill and changing the value of the label size in byte 2 from 0Ah to 0Eh. 6.1.2.1 Material type identification Byte 11 of the UL shal

49、l define the material type being identified using one of the values defined in Table 2. The use of material types 01h, 02h, 03h and 04h shall be deprecated for use in implementations using this revised standard. These values are preserved only for compatibility with systems implemented using SMPTE ST 330:2000. SMPTE ST 330:2011 Page 8 of 26 pages Table 2 Material type identification Byte value Meaning Examples and notes 01h picture