1、 Copyright 2013 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue., White Plains, NY 10601 (914) 761-1100 Approved February 5, 2013 Table of Contents Page Foreword . 3 Intellectual Property 3 Introduction 3 1 Scope . 4 2 Conformance Notation . 4 3 Normative References . 4 4 G
2、lossary, Definitions of Acronyms and Terms (Informative) 5 4.1 Glossary, Definitions and Terms . 5 4.2 Ancillary Space Tabulation . 8 5 Ancillary Data Space Definitions 9 5.1 Horizontal Ancillary data Space (HANC) 11 5.2 Vertical Ancillary Data Space (VANC) 14 5.3 Post-Switch and Pre-Switch of Verti
3、cal Ancillary Data Space (POST-VANC; PRE-VANC). 18 6 Ancillary Data Packets, Ancillary Data Space, Space Limitations and Rules 22 6.1 Types of Ancillary Data Packets . 22 6.2 Ancillary Data Packet Payload Update Rate. 23 6.3 Protected Words in Ancillary Data Space . 23 6.4 10-Bit Ancillary Data Spac
4、e Synchronization Protection 24 6.5 8-Bit Ancillary Data Space Synchronization Protection 24 6.6 Transposition of ancillary data packets between different video 24 7 Basic and Expanded Insertion Rules for Ancillary Data Packets 25 7.1 Basic Insertion Rules 25 7.2 Extended Insertion Rules 26 8 Proces
5、sing 8-Bit and 10-Bit Ancillary Data 26 8.1 8-Bit Stream Space . 27 8.2 10-Bit Stream Space . 27 9 DID Address Space Categories . 27 9.1 Packet Marked for Deletion . 28 Page 1 of 41 pages SMPTE RP 291-2:2013 SMPTE RECOMMENDED PRACTICE Ancillary Data Space Use 4:2:2 SDTV and HDTV Component Systems an
6、d 4:2:2 2048 1080 Production Image Formats SMPTE RP 291-2:2013 Page 2 of 41 pages 10 Ancillary Data Processing Equipment Recommendations (Informative) 28 10.1 Ancillary Data Packet Location in a Serial Digital Interface Stream 28 10.2 Packet Insertion Equipment Recommendations . 29 10.3 Packet Recei
7、ving Processing Equipment Recommendations 30 11 Existing Equipment Legacy Issues (Informative) . 30 12 Requirements of an Application Document (Informative) . 31 13 Tabulation of Existing Ancillary Data Packet Application Documents (Informative) 31 Annex A Bibliography (Informative) 32 Annex B Packe
8、t Payload Throughput Rate (Informative). 33 Annex C 8-Bit and 10-Bit Video Considerations (Informative) . 35 C.1 Introduction . 35 C.2 8-Bit Compatibility . 35 Annex D Ancillary Data Packets Nesting (Informative) 38 Annex E Ancillary Space Calculations (Informative) 39 E.1 Standard Definition Calcul
9、ations 39 E.2 High Definition Calculations 40 E.3 Mapping of 1080p/50/60 to Dual Link 1.5 Gb/s interface . 41 E.4 Mapping of 1080p/50/60 to 3 Gb/s Level B-Dual Link Interface . 41 SMPTE RP 291-2:2013 Page 3 of 41 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an int
10、ernationally-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
11、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 Par
12、t XIII of its Operations Manual. SMPTE RP 291-2 was prepared by Technology Committee 32NF. Intellectual Property At the time of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of this Recommended Practice. However, attention is drawn to the pos
13、sibility 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 Engineering Document. Ancillary dat
14、a space in a serial digital interface is that space not used by either the main video data stream or synchronizing signals and thus can be used as a transport for data associated with the main data stream. The packetized payload data carried in the ancillary data space is defined in separate applica
15、tion documents conforming to SMPTE ST 291-1. This document defines the supplementary usage rules for Ancillary data spaces on an interconnecting interface compliant with SMPTE ST 291-1. The ancillary data space located during the horizontal interval of every video line (between EAV and SAV) is calle
16、d horizontal ancillary data space (HANC). The ancillary data space located during the vertical interval of each field or frame, (between SAV and EAV) is called vertical ancillary data space (VANC). Ancillary data packets transported in the ancillary data space need to conform to rules of SMPTE ST 29
17、1-1. Some of the rules documented in SMPTE ST 291-1 are also repeated in this document. The packet location in ancillary data space is defined by an application document. SMPTE RP 291-2:2013 Page 4 of 41 pages 1 Scope This document provides information on the size of the ancillary data space in 8-bi
18、t and 10-bit 4:2:2 component HDTV systems and 10-bit 4:2:2 2048x1080 Production Image formats operating on 1.485 Gb/sec, and 2.97 Gb/sec and dual link 1.485 Gb/sec serial digital interfaces. Additionally, the document covers 8-bit and 10-bit 4:2:2 component SDTV systems operating on 270 Mb/sec seria
19、l digital interfaces. The frame rates of the included formats are in range from 24 Hz/1.001, 25 Hz, 30 Hz/1.001, 48 Hz/1.001, 50 Hz, and 60 Hz/1.001 for progressive, progressive segmented frames or interlace formats. This document also describes the rules for carriage of ancillary data packets confo
20、rming to SMPTE ST 291-1 The carriage of ancillary data packets in composite SDTV systems, 4:4:4 component systems 360 Mb/sec and 540 Mb/sec and multiple link 2.97 Gb/sec serial digital interfaces, 12-bit interfaces, as well as the carriage of ancillary data packets in file formats are not covered by
21、 this document. Numerical values shown in tables are based on a 10-bit interface word. 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 is text that
22、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 section expl
23、icitly 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“ indicate that, amo
24、ng 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 prohibited. The
25、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 addition ind
26、icates that the provision will never be defined in the future. 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; followed by formal languages; th
27、en figures; and then any other language forms. 3 Normative References Note: All references in this document to other SMPTE documents may use the current numbering style (e.g. SMPTE ST 125:1995) although, during a transitional phase, a reference document as published (printed or PDF) may bear an olde
28、r designation (such as ANSI/SMPTE 125M-1995). Documents with the same root number (e.g. 125) and publication year (e.g. 1995) are functionally identical. The following standards contain provisions that, through reference to this text, constitute provisions of this Recommended Practice. At the time o
29、f publication, the editions indicated were valid. All standards are subject SMPTE RP 291-2:2013 Page 5 of 41 pages to revision, and parties to agreements based on this Recommended Practice are encouraged to investigate the possibility of applying the most-recent edition of the standards indicated be
30、low. SMPTE ST 125:1995, Television Component Video Signal 4:2:2 Bit-Parallel Digital Interface SMPTE ST 274:2008, Television 1920 1080 Image Sample Structure, Digital Representation and Digital Timing Reference Sequences for Multiple Picture Rates SMPTE ST 296:2012 - 1280 720 Progressive Image 4:2:2
31、 and 4:4:4 Sample Structure Analog and Digital Representation and Analog Interface SMPTE ST 291-1:2011, Ancillary Data Packet and Space Formatting SMPTE ST 372:2011, Dual Link 1.5 Gb/s Digital Interface for 1920 1080 and 2048 1080 Picture Formats SMPTE ST 425-1:2011, Source Image Format and Ancillar
32、y Data Mapping for the 3 Gb/s Serial Interface SMPTE ST 2048-2:2011, 2048 1080 Digital Cinematography Production Image FS/709 Formatting for Serial Digital Interface SMPTE RP 165:1994, Error Detection Checkwords and Status Flags for Use in Bit-Serial Digital Interfaces for Television SMPTE RP 168:20
33、09, Definition of Vertical Interval Switching Point for Synchronous Video Switching Recommendation ITU-R BT 601-7 (2011), Studio Encoding Parameters of Digital Television for Standard 4:3 and Wide-Screen 16:9 Aspect Ratios Recommendation ITU-R BT 656-5 (2007), Interface for Digital Component Video S
34、ignals in 525-Line and 625-Line Television Systems Operating at the 4:2:2 Level of Recommendation ITU-R BT.601 Recommendation ITU-R BT 1700 (2005), Characteristics of Composite Video Signals for Conventional Analogue Television Systems 4 Glossary, Definitions of Acronyms and Terms (Informative) Glos
35、sary and definition of acronyms and terms used throughout this document are only valid for this Recommended Practice. Any similar terms used in other documents may deviate from the definitions included in this document, and this difference can be ignored. 4.1 Glossary, Definitions of Acronyms and Te
36、rms 4.1.1 ADF Ancillary Data Flag (3 digital code words 000h, 3FFh, 3FFh) indicates the start of an Ancillary data packet in all component video. 4.1.2 Ancillary Data Space Ancillary data space in a serial interface is space not used by the main video data stream or the synchronizing signals and thu
37、s can be used as a transport for data transmission associated with the main video data stream. This data space is essentially equal to the space defined by the horizontal or vertical intervals of a given video. The type of payload data carried in the ancillary data space is defined in separate appli
38、cation documents. SMPTE RP 291-2:2013 Page 6 of 41 pages 4.1.3 Ancillary Data Rate MWords/sec; a data throughput rate through ancillary space. For calculation of packet data payload throughput via an ancillary packet see Annex B. 4.1.4 Ancillary Data packet Type 1 Ancillary data packets Type 1 use a
39、 single digital ID code word called the DID, defined in SMPTE ST 291-1. 4.1.5 Ancillary Data packet Type 2 Ancillary data packets Type 2 use a pair of digital ID code words in combination called DID/SDID, defined in SMPTE ST 291-1. 4.1.6 color difference (CB/CR) Component signals CBand CRthat repres
40、ent the color of an image and are derived from the basic red, blue and green color components of an image. 4.1.7 CS Check Sum word (1 digital code word) is used to determine the validity of the ancillary data packet. CS serves as a detector to indicate if that the ancillary data packet was transmitt
41、ed over an interface without data corruption. The CS calculation for ancillary data packets is defined in SMPTE ST 291-1 4.1.8 DC Data Count Word (1 digital code word) indicating the length of the ancillary data packet payload. The use of the DC code word is defined in SMPTE ST 291-1. 4.1.9 DID Data
42、 Identification word (1 digital code word) is the main identification code word used by an Ancillary data packet application for ancillary data packets of Type 1 or as the first word of a pair (DID/SDID) for ancillary data packets of Type 2. Value ranges of DID words is defined in SMPTE ST 291-1. 4.
43、1.10 D-VITC Digital Vertical Interval Time Code defined in SMPTE ST 266 for SDTV Component Systems. 4.1.11 EAV End of Active Video consists of 4 digital data code words; this acronym is used for SDTV. 4.1.12 HANC Horizontal Ancillary Data Space is the Ancillary Data Space located during the horizont
44、al interval of a video line. The expressions HANC or HANC space are used interchangeably throughout the document. 4.1.13 H-EAV In HDTV, video End of Active Video (EAV) consists of 8 digital code words; to differentiate from the EAV in SDTV video. Within this document, this is called H-EAV. However,
45、the majority of SMPTE documents use the acronym EAV interchangeably regardless of whether it is related to SDTV or HDTV. SMPTE RP 291-2:2013 Page 7 of 41 pages 4.1.14 HDTV video High Definition Television Video; commonly based on use of 720 or 1080 line video; it can be either progressive or interla
46、ced scanning. 2048 x 1080 format is excluded from HDTV nomenclature. 4.1.15 HD-SDI High Definition Serial Digital Interface commonly used by 720 and 1080 line video interfaces operating at nominal 1.485 or 2.97 Gb/sec. 4.1.16 “h” A suffix indicating that a value is shown in a hexadecimal format. 4.1
47、.17 “H” A subscript indicating that a specific value is referenced to a horizontal time point defined by a specific point on a video line. 4.1.18 Horizontal interval An interval on each line of a field or frame between time reference points EAV and SAV designated for this purpose. In the past this s
48、pace used to be called “horizontal blanking interval” and some older documents still use this expression. 4.1.19 luma (Y) A component signal that presents brightness of an image. 4.1.20 PRE-VANC The portion of the VANC starting with the line following the end of the active video area and ending with
49、 the line before the vertical interval switch point in the vertical interval of a frame or field; see the illustration in Figure 2. 4.1.21 Protected value Code values that are reserved for synchronization purposes on the serial interface, or for identifying an ancillary data packet and thus are not permitted to be used in data payloads. 4.1.22 RP An acronym used by SMPTE for a Recommended Practice document. Within the text or tables of this document, prefix SMPTE prior Recommended Practice number will not always b
