SMPTE ST 2065-5-2016 Material Exchange Format - Mapping ACES Image Sequences into the MXF Generic Container.pdf

1、 Approved October 11, 2016 Copyright 2016 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 SMPTE ST 2065-5:2016 SMPTE STANDARD Material Exchange Format Mapping ACES Image Sequences into the MXF Generic Container Page 1 of 11 pages Table

2、 of Contents Page Foreword 2 Intellectual Property . 2 Introduction 2 1 Scope 3 2 Conformance Notation 3 3 Normative References 3 4 Terms and Definitions . 4 4.1 UL . 4 4.2 ACES image . 4 5 Essence Container Constraints 4 6 Homogeneous Essence . 4 7 Key and Value Coding 5 7.1 Picture Element Key . 5

3、 7.2 Picture Element Value 5 8 SMPTE Label Values . 5 8.1 Essence Container Label . 5 8.2 Picture Essence Coding Label . 6 9 Application Issues . 7 9.1 Index Table Usage (Informative) 7 9.2 Essence Container Partitions . 7 10 Essence Descriptors . 8 10.1 General 8 10.2 Generic Picture Essence Descri

4、ptor . 8 10.3 RGBA Picture Essence Descriptor 11 SMPTE ST 2065-5:2016 Page 2 of 11 pages 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 h

5、as members in over 80 countries on six continents. 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 coope

6、rates closely with other standards-developing organizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in its Standards Operations Manual. SMPTE ST 2065-5 was prepared by Technology Committee 31FS. Intellectual Property At the time of publ

7、ication no notice had been received by SMPTE claiming patent rights essential to the implementation of 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 ide

8、ntifying any or all such patent rights. Introduction This section is entirely informative and does not form an integral part of this Engineering Document. This standard specifies the mapping of a sequence of ACES (SMPTE ST 2065-4) coded still images into the MXF generic container, as specified in SM

9、PTE ST 379-2. ACES is an image-by-image coding scheme where each image is coded in an entirely independent bitstream and can be processed as an independent entity. This essence mapping does not constrain the use of any particular operational pattern. SMPTE ST 2065-5:2016 Page 3 of 11 pages 1 Scope T

10、his standard specifies frame- and clip-based mappings of a sequence of monoscopic ACES coded still pictures, as specified in SMPTE ST 2065-4, into the MXF generic container, as defined in SMPTE ST 379-2. This standard specifies the key, the length, and the value fields of the ACES coded picture elem

11、ent. This standard also defines the essence container and label values and the essence descriptor. 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 i

12、s 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 default, normative, except: the Introduction, any

13、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. The keywords, “should“ and “should not“ indica

14、te 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 or course of action is deprecated but not proh

15、ibited. 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 keyword “forbidden” indicates “reserved” and in

16、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 described. A conformant implementation need not impl

17、ement 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 definition; Tables shall be next; then formal languag

18、es; then figures; and then any other language forms. 3 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this engineering document. At the time of publication, the editions indicated were valid. All standards are subject t

19、o revision, and parties to agreements based on this engineering document are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE ST 298:2009, Universal Labels for Unique Identification of Digital Data SMPTE ST 377-1:2011, Material Exc

20、hange 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 2065-5:2016 Page 4 of 11 pages SMPTE ST 379-2:2010, Material Exchange Format (MXF) MXF Constrained Generic Container SMPTE ST 2065-1:2012, Academy Color Encoding Spec

21、ification (ACES) SMPTE ST 2065-4:2013, ACES Image Container File Layout 4 Terms and Definitions For the purposes of this document, the following terms and definitions apply. 4.1 UL SMPTE Administered Universal Label as defined in SMPTE ST 298. 4.2 ACES image ACES image container file as defined in S

22、MPTE ST 2065-4. 5 Essence Container Constraints The essence container shall conform to SMPTE ST 379-2. 6 Homogeneous Essence For both frame-wrapping and clip-wrapping as specified in SMPTE ST 379-2, the ACES image header attributes listed in Table 1, and defined in SMPTE ST 2065-4, shall be identica

23、l for all ACES images in the essence container. Table 1 ACES image header attributes (SMPTE ST 2065-4) to be identical ACES image header attribute channels dataWindow displayWindow pixelAspectRatio The size in bytes of all ACES images in the essence container shall be identical. Note: The end-of-fil

24、e filler and/or the optional image header attribute “free” (see SMPTE ST 2065-4) can be used to achieve a constant image size SMPTE ST 2065-5:2016 Page 5 of 11 pages 7 Key and Value Coding 7.1 Picture Element Key The picture element key shall be the UL defined in Table 2 or the UL defined in Table 3

25、 Values for bytes 14 and 16 (denoted cc and nn respectively) are defined in SMPTE ST 379-2. Table 2 and Table 3 define Essence registry entries for the ACES picture element keys. Table 2 ACES frame-wrapped picture element key Name Frame-wrapped ACES Picture Element Item UL urn:smpte:ul:060e2b34.010

26、20101.0d010301.15cc12nn Definition Identifies a frame-wrapped ACES Picture Element Table 3 ACES clip-wrapped picture element key Name Clip-wrapped ACES Picture Element Item UL urn:smpte:ul:060e2b34.01020101.0d010301.15cc13nn Definition Identifies a clip-wrapped ACES Picture Element 7.2 Picture Eleme

27、nt Value 7.2.1 Frame-wrapped The value field shall comprise a single ACES image as defined in SMPTE ST 2065-4. 7.2.2 Clip-wrapped The value field shall comprise a sequence of one or more concatenated ACES images, where each ACES image is as defined in SMPTE ST 2065-4. Each individual ACES image with

28、in a sequence of ACES images shall contain all components of the ACES file layout as defined in SMPTE ST 2065-4. The components of the file layout are the magic number, a version field, the header, the line offset table, the scan line storage and the end-of-file filler. 8 SMPTE Label Values 8.1 Esse

29、nce Container Label This Essence Container Label is the UL value carried in the Essence Containers Properties of the Partition Packs, Preface Set and File Descriptor. Partition Packs, Preface Set and File Descriptor are as defined in SMPTE ST 377-1. The value for the Essence Container Label shall be

30、 the UL defined in Table 5 or the UL defined in Table 6. Table 4, Table 5 and Table 6 define Label registry entries for the ACES Essence Container labels. SMPTE ST 2065-5:2016 Page 6 of 11 pages Table 4 Essence container label node for ACES SMPTE ST 2065-4 images Name MXF-GC ACES Pictures Symbol MXF

31、GCACESPictures Namespace http:/www.smpte-ra.org/reg/400/2012/13/1/aaf Item UL urn:smpte:ul:060e2b34.0401010d.0d010301.02190000 Definition Identifiers for MXF-GC mappings of ACES SMPTE ST 2065-4 Pictures Table 5 Essence container label for Frame-wrapped ACES SMPTE ST 2065-4 images Name MXF-GC Frame-w

32、rapped ACES Pictures Symbol MXFGCFrameWrappedACESPictures Namespace http:/www.smpte-ra.org/reg/400/2012/13/1/aaf Item UL urn:smpte:ul:060e2b34.0401010d.0d010301.02190100 Definition Identifier for MXF-GC, Frame-wrapped ACES SMPTE ST 2065-4 images Table 6 Essence container label for Clip-wrapped ACES

33、SMPTE ST 2065-4 images Name MXF-GC Clip-wrapped ACES Pictures Symbol MXFGCClipWrappedACESPictures Namespace http:/www.smpte-ra.org/reg/400/2012/13/1/aaf Item UL urn:smpte:ul:060e2b34.0401010d.0d010301.02190200 Definition Identifier for MXF-GC, Clip-wrapped ACES SMPTE ST 2065-4 images The essence con

34、tainer UL is used within a batch of ULs in partition packs and the preface set and on its own in the essence descriptor. 8.2 Picture Essence Coding Label The picture essence coding label is a UL used in the generic picture essence descriptor. The value for the picture essence coding label shall be t

35、he UL defined in Table 8 or the UL defined in Table 9. Table 7, Table 8 and Table 9 define Label registry entries for the ACES Picture Essence Coding labels. Table 7 Picture essence coding label node for ACES SMPTE ST 2065-4 picture coding Name ACES Picture Coding Schemes Symbol ACESPictureCodingSch

36、emes Namespace http:/www.smpte-ra.org/reg/400/2012 Item UL urn:smpte:ul:060e2b34.0401010d.04010202.03040000 Definition Identifies ACES SMPTE ST 2065-4 Picture Coding Schemes SMPTE ST 2065-5:2016 Page 7 of 11 pages Table 8 Picture essence coding label for ACES SMPTE ST 2065-4 monoscopic uncompressed

37、picture coding without alpha channel Name ACES Uncompressed Monoscopic Without Alpha Symbol ACESUncompressedMonoscopicWithoutAlpha Namespace http:/www.smpte-ra.org/reg/400/2012 Item UL urn:smpte:ul:060e2b34.0401010d.04010202.03040100 Definition Identifier for ACES SMPTE ST 2065-4 monoscopic uncompre

38、ssed picture coding without alpha channel Table 9 Picture essence coding label for ACES SMPTE ST 2065-4 monoscopic uncompressed picture coding with alpha channel Name ACES Uncompressed Monoscopic With Alpha Symbol ACESUncompressedMonoscopicWithAlpha Namespace http:/www.smpte-ra.org/reg/400/2012 Item

39、 UL urn:smpte:ul:060e2b34.0401010d.04010202.03040200 Definition Identifier for ACES SMPTE ST 2065-4 monoscopic uncompressed picture coding with alpha channel 9 Application Issues 9.1 Index Table Usage (Informative) The length of an ACES image is not indicated in the ACES header component. If there i

40、s no index table as defined in SMPTE ST 377-1 and clip-wrapping is used, an arbitrary ACES Image within the essence can be reached by: first seeking to the beginning of the end of file filler of the first ACES Image in the essence container, then, from that position, searching for the magic number o

41、f the second ACES Image in the essence container, then seeking to the beginning of the end of file filler of the second ACES Image in the essence container, and so forth until the desired ACES Image is reached. An index table can provide the means to directly seek to an image. 9.2 Essence Container

42、Partitions Each ACES image shall be entirely within one partition. Note: SMPTE ST 377-1-2011, Section 6.2.2 (Partition Rules Summary) summarizes the use of partitions in MXF files. SMPTE ST 2065-5:2016 Page 8 of 11 pages 10 Essence Descriptors 10.1 General SMPTE ST 2065-4 defines only RGB images (wi

43、th or without alpha channel). Therefore, the Top-Level File Package of Image Track File shall reference an RGBA Picture Essence Descriptor as defined in SMPTE ST 377-1. 10.2 Generic Picture Essence Descriptor The Generic Picture Essence Descriptor items shall be constrained as specified in Table 10.

44、 Table 10 Generic Picture Essence Descriptor Items Generic Picture Essence Descriptor Item Constraints Sample Rate See Section 10.2.1. Signal Standard Shall not be present. Frame Layout Shall be 00h (= full_frame ) Stored Width See Section 10.2.2. Stored Height See Section 10.2.2. StoredF2Offset Sha

45、ll not be present. Sampled Width Shall not be present or shall be equal to Stored Width. Sampled Height Shall not be present or shall be equal to Stored Height. SampledXOffset Shall not be present or shall be 0. SampledYOffset Shall not be present or shall be 0. DisplayHeight See Section 10.2.3. Dis

46、playWidth DisplayXOffset DisplayYOffset DisplayF2Offset Shall not be present. AspectRatio See Section 10.2.4. Active Format Descriptor Shall not be present. Video Line Map Shall be present and equal to 00h,00h Note: Video Line Map is set to its Distinguished Value because no video interface is defin

47、ed for ACES. Alpha Transparency Shall not be present. Transfer Characteristic Shall be present. See Section 10.2.5. Image Alignment Offset Shall not be present. SMPTE ST 2065-5:2016 Page 9 of 11 pages Generic Picture Essence Descriptor Item Constraints Image Start Offset Shall not be present. Image

48、End Offset Shall not be present. FieldDominance Shall not be present. Picture Essence Coding Shall be present. See Section 8.2. Coding Equations Shall not be present. Color Primaries Shall be present. See Section 10.2.6. 10.2.1 Sample Rate The value of the Sample Rate shall be set according to the E

49、dit Rate of the material. 10.2.2 Stored Width and Stored Height The values of the Stored Width and Stored Height items shall be set according to the ACES dataWindow attribute, as specified in Table 11. The ACES attributes are defined in SMPTE ST 2065-4. Table 11 Stored Width and Stored Height values MXF Item Values from required ACES Attributes Stored Width dataWindow.xMax dataWindow.xMin + 1 Stored Height dataWindow.yMax dataWindow.yMin + 1