1、 Copyright 2014 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved May 13, 2014 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction 2 1 Scope . 3 2 Conformance Notation . 3 3 Normative References . 3 4 Defini
2、tion of Acronyms, Terms and Data Types 4 5 Metadata Structure . 4 6 Descriptor . 5 7 Essence Container Structure . 5 Page 1 of 5 pages SMPTE ST 2070-3:2014 SMPTE STANDARD Stereoscopic 3D in MXF for Operations OP-Atom or Single Track OP-1a Mapping SMPTE ST 2070-3:2014 Page 2 of 5 pages Foreword SMPTE
3、 (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
4、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
5、ing Documents are drafted in accordance with the rules given in its Standards Operations Manual. SMPTE ST 2070-3 was prepared by Technology Committee 31FS. Intellectual Property At the time of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of
6、this Engineering Document. However, attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. SMPTE shall not be held responsible for identifying any or all such patent rights. Introduction There are requirements for both interleaved and se
7、parated stereoscopic (3D) content. While the timing relationship between each pair of images is especially important during stereoscopic acquisition and display, during post-production and distribution image pairs may be dealt with in non-real time as outlined in this suite of documents. When conten
8、t is created for distribution, left eye and right eye pictures might be interleaved. When content needs to be edited or manipulated in post-production, it might be stored as separated files. In stereoscopic acquisition, either an interleaved or separated structure can be used. As a stereoscopic 3D a
9、sset moves from production, through post-production to distribution (whether broadcast, web, on-demand or other), these can be transcoded and rewrapped. Upon playout of a file compliant with this suite of standards, the timing relationships between left-eye images and right-eye images must be recrea
10、ted. SMPTE ST 2063 discusses this requirement (and others germane to high quality stereoscopic 3D production) in detail, and may be helpful to implementers. The SMPTE ST 2070 document suite therefore addresses such use cases based on the common provisions defined in the part 1 document. The part 2 d
11、ocument specifies the interleaved wrapping using OP-1a and this part 3 document provides the single track wrapping using OP-Atom or OP-1a. Dual image stereoscopic 3D imaging systems deliver two images (left eye and right eye) that are arranged to be seen simultaneously, or near simultaneously, by th
12、e left and right eyes. Viewers then perceive increased depth in the picture, which becomes more like the natural binocular viewing experience. Regardless of how the pair of images are created, it is assumed that they are properly aligned in space and time at the input of the MXF file system. This st
13、andard therefore describes means by which the MXF file system can be as transparent as possible to the time and space alignment of the image pair. The SMPTE D-Cinema family of standards describes a MXF mapping for stereoscopic images within that application space. The ST 2070 suite of documents is n
14、ot intended to be used in the D-Cinema application space. SMPTE ST 2070-3:2014 Page 3 of 5 pages 1 Scope This document specifies the wrapping of a stereoscopic 3D video stream using separated MXF files, which can be OP-Atom or OP-1a. This document follows the common provisions defined in Part 1 of t
15、his multipart document and defines the Header Metadata structure, Descriptor, and the Essence Container structure for the separated stereoscopic wrapping. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conformance language k
16、eywords: “shall“, “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 i
17、s, by default, 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 p
18、ermitted. The 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 po
19、ssibility or 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 futu
20、re. The keyword “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“)
21、 as described. 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 authoritati
22、ve definition; Tables shall be next; followed by formal languages; then figures; and then any other language forms. 3 Normative References Note: All references in this document to other SMPTE documents use the current numbering style (e.g. SMPTE ST 378:2004) although, during a transitional phase, th
23、e document as published (printed or PDF) may bear an older designation (such as SMPTE 378M-2004). Documents with the same root number (e.g. 378) and publication year (e.g. 2004) are functionally identical. The following standards contain provisions that, through reference in this text, constitute pr
24、ovisions of this recommended practice. 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 b
25、elow. SMPTE ST 377-1:2011, Material Exchange Format (MXF) File Format Specification Amendment 1:2012 to SMPTE ST 377-1:2011 Amendment 2:2012 to SMPTE ST 377-1:2011 SMPTE ST 2070-3:2014 Page 4 of 5 pages SMPTE ST 378:2004, Material Exchange Format (MXF) Operational pattern 1A (Single Item, Single Pac
26、kage) SMPTE ST 379-2:2010, Material Exchange Format (MXF) MXF Constrained Generic Container SMPTE ST 390:2011, Material Exchange Format (MXF) Specialized Operational Pattern “OP-Atom” (Simplified Representation of a Single Item) SMPTE ST 2070-1:2014, Stereoscopic 3D in MXF for Operations Common Prov
27、isions 4 Definition of Acronyms, Terms and Data Types For the purposes of this document, the terms and definitions given in SMPTE ST 377-1 apply. File-groups compliant with this standard shall comply with the terms of either SMPTE ST 390 (for OP-Atom) or SMPTE ST 378 (for OP-1a) in structure. 5 Meta
28、data Structure File-groups compliant with this standard shall include two picture essence files, one carrying the left eye pictures and the other carrying the right eye pictures. Each such picture essence file shall identify the respective eye by the OperationsStereoscopic SubDescriptor, defined in
29、SMPTE ST 2070-1. There may be other tracks in other files. There shall be a single File Package in each file. Figure 1 illustrates how the Content Storage might be structured in a left eye picture essence file. Figure 1 Content Storage illustrative example in a left eye picture file S o u n d T r a
30、c k ( c h 1 ) S e q u e n c e S o u r c e Cl i pT i m e c o d e T r a c k S e q u e n c eT i m e c o d eC o m p o n e n tP i c tu r e T r a c k S e q u e n c e S o u r c e Cl i pE s s e n c e De s c r i p to rP i c tu r e T r a c k (L) S e q u e n c e S o u r c e Cl i pS te r e o s c o p i cS u b De
31、 s c r i p to rCo n te n t S to r a g eM a te r i a l P a c k a g eS o u r c e P a c k a g eP i c tu r e (L)P i c tu r e T r a c k (R) S e q u e n c e S o u r c e Cl i pE x te r n a l f i l e sS o u r c e P a c k a g eP i c tu r e (R)S o u r c e P a c k a g eS o u n d (c h 1 )SMPTE ST 2070-3:2014 Pa
32、ge 5 of 5 pages 6 Descriptor Any Picture Essence Descriptor used to describe stereoscopic picture essence wrapped according to this standard shall have a strong reference to the OperationsStereoscopic SubDescriptor defined in SMPTE ST 2070-1 and which shall be used as a SubDescriptor in the Source P
33、ackage of each picture essence file to signal the stereoscopic 3D wrapping and to identify each streams eye association (Left or Right). 7 Essence Container Structure There shall be a single Essence Container carrying either a left eye picture or a right eye picture in each picture essence file. The Essence Container shall be frame wrapped or clip wrapped as described in SMPTE ST 379-2.
