SMPTE ST 436-1-2013 MXF Mappings for VI Lines and Ancillary Data Packets.pdf

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1、 Copyright 2013 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved November 6, 2013 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction 2 1 Scope . 4 2 Conformance Notation . 4 3 Normative References . 4 4 De

2、finitions 5 5 Common Provisions for MXF Wrapping of VI Lines and ANC Packets . 7 5.1 The Sequence of VI Lines and ANC Packets in a Frame 7 5.2 The Synchronization of VI Elements, ANC Elements, and Video 8 5.3 Essence Container ULs . 9 5.4 Sample Coding . 9 5.5 The Number of VI Lines or ANC Packets P

3、roperty (Informative) . 11 5.6 Line Numbers for Video Fields and Frames (Informative) 11 5.7 Multiple Video Streams with VI Elements and/or ANC Elements (Informative) 12 6 MXF Vertical Interval Line Wrapping Specifications 12 6.1 VI Elements 12 6.2 VI Payload Byte Array and Sample Coding . 15 7 MXF

4、Ancillary Data Packet Wrapping Specifications 15 7.1 ANC Element . 15 7.2 ANC Payload Array and Sample Coding . 18 8 Descriptors . 18 8.1 VI Data Descriptor 19 8.2 Key for the VI Data Descriptor . 19 8.3 ANC Data Descriptor 19 8.4 Key for the ANC Data Descriptor . 20 Annex A Bibliography (Informativ

5、e) . 21 Annex B Known Padding and Alignment Rules (Normative) . 23 B.1 Structure Padding to Achieve Four-Byte Alignment 23 B.2 Structure Padding to a Multiple of Four-Bytes . 24 B.3 Payload Padding to a Multiple of Four-Bytes . 24 B.4 Final Structure Padding to Achieve Four-Byte Element Alignment .

6、25 B.5 No Padding 26 Annex C Changes from SMPTE 436M-2006 (Informative) 27 Page 1 of 27 pages SMPTE ST 436-1:2013 Revision of SMPTE 436M-2006 SMPTE STANDARD MXF Mappings for VI Lines and Ancillary Data Packets SMPTE ST 436-1:2013 Page 2 of 27 pages Foreword SMPTE (the Society of Motion Picture and T

7、elevision 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, Recommended Practices, and Engineering

8、 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 Engineering Documents are drafted in accordan

9、ce with the rules given in Part XIII of its Operations Manual. SMPTE ST 436-1 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 this Engineering Document. However,

10、 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 This section is entirely informative and does not form an integral part of this Engin

11、eering Document. Many of the established broadcast file formats transport opaque (without knowledge of the contents) Vertical Interval lines (VI lines or VI data) and Ancillary Packets (ANC packets). This standard is intended to allow the transport of opaque VI lines and ANC packets for compatibilit

12、y with established formats and to facilitate the use of MXF for existing and new applications. Previous SMPTE documents used the nomenclature “Vertical Blanking Interval” which is being changed to “Vertical Interval” in new documents. VI lines and ANC packets have many applications. In some cases th

13、is information can be encapsulated as standardized MXF essence or metadata items (e.g. embedded audio). In other cases this approach is not practical. For example, some applications documented by SMPTE may not have direct MXF mappings; in addition, some operators encode non-standardized data in VI l

14、ines. Attempting to document each of these applications is outside the scope of this standard. Adding a capability to MXF which supports opaque VI lines and opaque Ancillary packets is a better solution. This standard provides a variety of VI data and ANC packet transport facilities which supports a

15、 broad range of MXF applications. In some applications the VI line or ANC packet mapping defined in SMPTE ST 385 / SMPTE ST 331 could be the best transport model (e.g. SMPTE ST 386 and SMPTE ST 387). Using SMPTE ST 382 to transport embedded audio (see SMPTE ST 299-1 and SMPTE ST 299-2) is current pr

16、actice and is recommended for new implementations. It is recommended that new MXF standards use the VI line and ANC packet mapping that is most appropriate for the application. If an MXF files contents are converted from one video format to another, the VI data and ANC packets could require processi

17、ng. In some cases, the conversions are simple and in others the conversions are complex. The specification of these conversions is beyond the scope of this standard. Additional information can be found in SMPTE RP 291-2. SMPTE ST 436-1:2013 Page 3 of 27 pages This standard describes the transport of

18、 VI data and ANC packets in MXF files. This standard establishes a partial set of requirements and policies for the capture of video signals by encoders and for the regeneration of video signals by decoders. Specifications of some requirements (e.g. the processing of illegal input signals) are not p

19、art of the specification for MXF systems components. These specifications could be part of other standards and recommended practices. Users of this standard must follow the recommendations and requirements established by video signal standards and recommended practices. This document does not descri

20、be the restrictions and capabilities of video interfaces; it offers features needed to transport VI lines and ANC packets in an MXF file. This standard does not specify which VI lines or ANC packets will be captured by an encoder, or included in the MXF file or processed by a decoder. These provisio

21、ns can be found in other documents or established by an application specification, a vendor or an end-user. The original version of this standard encoded physical or logical Serial Digital Interface sample streams defined by SMPTE ST 259, SMPTE ST 292-1 and SMPTE ST 424 as MXF files. This standard c

22、an be used with Serial Digital Interface standards derived from the above standards given the limitations of this documents representation of VI Data, ANC Packets and the required MXF metadata. SMPTE ST 436-1:2013 Page 4 of 27 pages 1 Scope This standard describes the carriage of Vertical Interval (

23、VI) data and Ancillary (ANC) packets (HANC and VANC) in an MXF file. This standard defines the MXF wrapping of VI lines for 8-bit and 10-bit component digital signals for standard definition and high-definition television systems. This standard defines the MXF wrapping of ANC packets located on SMPT

24、E Serial Digital Interfaces. This standard specifies information to be encoded in an MXF file so that a decoder can place decoded VI data and ANC packets at the desired locations in a reconstructed television signal. This standard does not describe the content of MXF VI data payloads and MXF ANC pac

25、ket payloads or their conversion to and from physical or logical interfaces, networks, and systems other than MXF. 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“. In

26、formative 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 default, normative, except: the In

27、troduction, 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. The keywords, “should“ and “sh

28、ould 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 or course of action is depreca

29、ted 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 keyword “forbidden” indicates “r

30、eserved” 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 described. A conformant implementati

31、on 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 definition; Tables shall be next; fol

32、lowed 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 259:2008) although, during a transitional phase, the document as published (printed or PDF)

33、 may bear an older designation (such as SMPTE 259M-2008). Documents with the same root number (e.g. 259) and publication year (e.g. 2008) are functionally identical. The following standards contain provisions that, through reference in this text, constitute provisions of this standard. At the time o

34、f 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 below. SMPTE ST 436-1:2013 Page 5 of 27 pages SMPTE S

35、T 259:2008, Television SDTV Digital Signal/Data Serial Digital Interface SMPTE ST 291-1:2011, Ancillary Data Packet and Space Formatting (Note: Document previously numbered SMPTE ST 291:2011 Content Unchanged) SMPTE ST 292-1:2012, 1.5 Gb/s Signal/Data Serial Interface SMPTE ST 377-1:2011, Material E

36、xchange 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 379-1:2009, Material Exchange Format (MXF) MXF Generic Container SMPTE ST 379-2:2010, Material Exchange Format (MXF) MXF Constrained Generic Container SMPTE ST 424:

37、2012, 3 Gb/s Signal/Data Serial Interface SMPTE RP 168:2009, Definition of Vertical Interval Switching Point for Synchronous Video Switching 4 Definitions The full glossary of acronyms, terms and data types used in the MXF specification is given in the MXF File Format Specification (SMPTE ST 377-1).

38、 They are not repeated here to avoid any divergence of meaning. The following additional definitions shall be used when interpreting this standard. 4.1 Active video The lines in the television raster (and the samples within each of these lines) that are part of the visible image. 4.2 ANC packets Anc

39、illary packets contain up to 255 10-bit words of user data and most control and identifier words. These packets are transported in the vertical and horizontal intervals of a television signal. See SMPTE ST 291-1 and SMPTE RP 291-2. Note: SMPTE ST 291-1 allows multiple type 1 ANC packets to be logica

40、lly combined to transport ANC user data blocks with more than 255 user data words. This standard transports opaque ANC packets of all types. 4.3 ANC Element The collection of ANC Structures for one field or frame of video. 4.4 ANC Payload Array The ANC packet data for one ANC packet including the DI

41、D, data block number or SDID, data block count, ANC user data words, and possibly the check sum word. Note: The use of ANC Payload Array might be confused with the ANC payload (ANC user data) used in some other SMPTE documents; caution is advised. 4.5 ANC Structure The MXF properties for an ANC pack

42、et and the ANC Payload Array. This represents one ANC packet in an MXF file. SMPTE ST 436-1:2013 Page 6 of 27 pages 4.6 Data Element KLV wrapped data essence within a Content Package. See SMPTE ST 379-1 and SMPTE ST 379-2 for additional information. 4.7 End active video (EAV) A code word sequence in

43、 a stream that immediately follows the active video samples in a line. See SMPTE ST 125 and SMPTE RP 291-2. 4.8 Frame-wrapped This standard uses the definitions of frame wrapping from the MXF family of standards. Note: Frame wrapping in these documents means one of the following: 1) “frame wrapping”

44、 of a single frame (field 1 and field 2 of an interlaced image or both fields of a progressive segmented frame image); 2) “field wrapping” of a single field of an interlaced image; or 3) “progressive frame wrapping” of a progressive frame (ascending lines within the frame). 4.9 Line numbers Line num

45、bers in this standard shall follow the model defined in SMPTE ST 377-1 Annex “G.1.4 Video Interface” for component digital formats. 4.10 Picture Element KLV wrapped picture essence data within a Content Package. See SMPTE ST 379-1, SMPTE ST 379-2, SMPTE ST 381-1, SMPTE ST 381-2 and SMPTE ST 381-3 fo

46、r additional information. 4.11 Start active video (SAV) A code word sequence in a stream that immediately precedes the active video samples in a line. See SMPTE ST 125 and SMPTE RP 291-2. 4.12 Switching line The line in a video signal where switching between two synchronous video signals should occu

47、r. See SMPTE RP 168. 4.13 Vertical interval (VI) The lines starting with the first line in a field or frame and ending with the line before the first active video line. “VI line” is used where the concept refers to the raster line containing VI data. The phrase “VI data” is used where the concept is

48、 the payload of the VI line. Vertical Interval is used in new SMPTE standards to refer to the vertical space in both analog and digital signals. 4.14 VI Element The collection of VI Structures for one field or frame of video in an MXF file. 4.15 VI Payload Array The data for one VI line. 4.16 VI Str

49、ucture The MXF properties for a VI data and the VI Payload Array. This represents one VI line in an MXF file. SMPTE ST 436-1:2013 Page 7 of 27 pages 5 Common Provisions for MXF Wrapping of VI Lines and ANC Packets The VI data and ANC packets are carried in this standard as frame-wrapped Data Elements in the Generic Container. This allows the VI lines and ANC packets to be synchronized and co-located with the associated audio and video VI lines and ANC packets encoded using this standard shall be frame wrapped as defined in SMPTE ST 379-1 and SMP