1、 Copyright 2015 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved March 26, 2015 Page 1 of 45 pages Table of Contents Page Foreword 3 Intellectual Property . 3 Introduction 3 1 Scope 3 2 Conformance Notation 4 3 Normative Refere
2、nces 5 4 Definition of Terms 5 5 Image Formats 7 5.1 1080-line Source Image Formats 7 5.1.1 Source Sample Number Representation . 8 5.2 2160-line Source Image Formats . 8 5.2.1 Source Sample Number Representation . 8 5.3 Image Mapping Overview . 8 5.3.1 1080-line Image System Overview 8 5.3.2 2160-l
3、ine Image System Overview 9 5.4 Number of Audio Channels 10 6 1080-line Level A Mapping . 11 6.1 Level A Mapping 1080-line Source Image . 11 6.1.1 Mapping Structure II - 4:4:4 (RGB)/ (YCBCR) and 4:4:4:4 (RGB+A)/ (YCBCR +A)/10-bit Signals 11 6.1.2 Mapping Structure III - 4:4:4 (RGB)/ (YCBCR)/12-bit S
4、ignals . 12 6.1.3 Mapping Structure IV - 4:2:2 (YCBCR) and 4:2:2:4 (YCBCR +A)/12-bit Signals 14 6.2 Ancillary Data 16 6.2.1 Audio Data 17 6.2.2 Time Code Data . 18 6.2.3 Payload Identifier 18 SMPTE ST 425-3:2015 Revision of SMPTE ST 425-3:2014 SMPTE STANDARD Image Format and Ancillary Data Mapping f
5、or the Dual Link 3 Gb/s Serial Interface SMPTE ST 425-3:2015 Page 2 of 45 pages 7 1080-line Level BDual-Link Mapping . 21 7.1 1080-line Source Image . 21 7.1.1 Mapping Structure II - 4:4:4 (RGB)/ (YCBCR) and 4:4:4:4 (RGB+A)/ (YCBCR +A)/10-bit Signals . 25 7.1.2 Mapping Structure III - 4:4:4 (RGB)/ (
6、YCBCR)/12-bit Signals. 26 7.1.3 Mapping Structure IV - 4:2:2 (YCBCR) and 4:2:2:4 (YCBCR+A)/12-bit Signals 27 7.2 Ancillary Data 29 7.2.1 Audio Data . 29 7.2.2 Time Code Data . 31 7.2.3 Payload Identifier . 31 8 2160-line Mapping 33 8.1 Mapping of 2160-line Source Image. 33 8.1.1 Multiplex Structure
7、. 34 8.2 Ancillary Data 35 8.2.1 Audio Data . 35 8.2.2 Time Code Data . 36 8.2.3 Payload Identifier . 37 9 Data Stream Assignment for 3G-SDI Link 1 and 3G-SDI Link 2 . 39 9.1 3G-SDI Link 1/ 3G-SDI Link 2 Interface Timing . 39 10 Levels of Operation (Informative) . 39 Annex A Bibliography (Informativ
8、e). 40 Annex B Square Division of 2160-image Formats (Informative) 41 B.1 Quad 1.5 Gb/s Serial Digital Interface Mapping . 41 B.2 Dual 3 Gb/s Level B Dual-Stream Mapping . 42 Annex C Ancillary Data Capacity of the Dual Link Interface (Informative) 44 Annex D Document Roadmap (Informative) 45 SMPTE S
9、T 425-3:2015 Page 3 of 45 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 has members in over 80 countries on six continents. SMPTEs
10、 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 cooperates closely with other standards-developing organizatio
11、ns, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the rules given in its Standards Operation Manual. SMPTE ST 425-3 was prepared by Technology Committee 32NF. Intellectual Property At the time of publication no notice had been received by SMPTE claiming paten
12、t 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 identifying any or all such patent rights. Introduction This s
13、ection is entirely informative and does not form an integral part of this Engineering Document. There is a need in the industry to have an interface for transporting images complying with 4:2:2 and 4:4:4 10 bit and 12-bit image formats defined by SMPTE ST 274, ST 2048-1, ST 2048-2 and ST 2036-1 whic
14、h can be transported by a dual SMPTE ST 424 serial interfaces. This standard also defines the payload identifier. SMPTE ST 425-3:2015 Page 4 of 45 pages 1 Scope This standard defines 1080-line and 2160-linemapping formats as described below; 1080-line mapping specifies: The mapping of the image form
15、ats of 1920 1080 and 2048 1080 pixels listed in Table 2 into four parallel 10-bit data streams (known as data stream one, data stream two, data stream three and data stream four) of a 40-bit virtual interface, followed by the mapping of these four 10-bit data streams onto the Dual Link 3 Gb/s Serial
16、 Interface (3G-SDI Link 1 and Link 2) via two 20-bit virtual interfaces. 2160-line mapping specifies: The mapping of the image formats of 3840 2160 and 4096 2160 pixels listed in Table 3 into four parallel 10-bit data streams (known as data stream one, data stream two, data stream three and data str
17、eam four) of a 40-bit virtual interface, followed by the mapping of these four 10-bit data streams on to the Dual Link 3 Gb/s Serial Interface (3G-SDI Link 1 and Link 2) via two 20-bit virtual interfaces. This standard also defines the carriage of ancillary data such as the audio data, the audio con
18、trol packets, the payload identifier and the time code. It is not necessary for implementations to include support for all formats that are included in this standard. Implementers should indicate supported formats in commercial publications. 2 Conformance Notation Normative text is text that describ
19、es elements of the design that are indispensable or contains the conformance language keywords: “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.
20、Informative text does not contain any conformance keywords. All text in this document is, 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 stric
21、tly 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, among several possibilities, one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action
22、 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 keywords “may“ and “need not“ indicate courses of action permissible within the limits of the document. The keyword “reserved” indicates a provis
23、ion 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 indicates that the provision will never be defined in the future. A conformant implementation according to this document is one that includes all ma
24、ndatory provisions (“shall“) and, if implemented, all recommended provisions (“should“) 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 inf
25、ormation in this document shall be as follows: Normative prose shall be the authoritative definition; Tables shall be next; followed by formal languages; then figures; and then any other language forms. SMPTE ST 425-3:2015 Page 5 of 45 pages 3 Normative References Note: All references in this docume
26、nt to other SMPTE documents use the current numbering style (e.g. SMPTE ST 274:2008) although, during a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 274M-2008). Documents with the same root number (e.g. 274) and publication year (e.g. 20
27、08) are functionally identical. The following standards contain provisions that, through reference in 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 stand
28、ard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE ST 12-2:2014, Transmission of Time Code in the Ancillary Data Space SMPTE ST 274:2008, Television 1920 x 1080 Image Sample Structure, Digital Representation and Digital Timin
29、g Reference Sequences for Multiple Picture Rates SMPTE ST 292-1:2012, 1.5 Gb/s Signal / Data Serial Interface SMPTE ST 299-1:2009, 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface SMPTE ST 299-2:2010, Extension of the 24-Bit Digital Audio Format to 32 Channels for 3 Gb/s Bit-Serial Int
30、erfaces SMPTE ST 352:2013, Payload Identification Codes for Serial Digital Interfaces SMPTE ST 372:2011, Dual Link 1.5 Gb/s Digital Interface for 1920 x 1080 and 2048 x 1080 Picture Formats SMPTE ST 425-1:2014, Source Image Format and Ancillary Data Mapping for the 3 Gb/s Serial Interface SMPTE ST 4
31、35-1:2012, 10 Gb/s Serial Signal / Data Interface Part 1: Basic Stream Distribution SMPTE ST 2036-1:2014, Ultra High Definition Television Image Parameter Values for Program Production SMPTE ST 2048-1:2011, 2048 1080 and 4096 2160 Digital Cinematography Production Image Formats FS/709 SMPTE ST 2048-
32、2:2011, 2048 x 1080 Digital Cinematography Production Image FS/709 Formatting for Serial Digital Interface 4 Definition of Terms This section defines terms used in this document. 4.1 3G-SDI Link 1/ 3G-SDI Link 2 Each of the two links that together compose the Dual Link 3 Gb/s Serial Interface 4.2 Al
33、pha Channel An application dependent auxiliary component that is related to the source image (e.g. RGB or YCBCR). These interfaces are denoted RGB+A and YCBCR +A. Key signals as defined in SMPTE RP 157 are one example of an alpha signal. SMPTE ST 425-3:2015 Page 6 of 45 pages 4.3 Data stream one / d
34、ata stream two / data stream three / data stream four Four parallel 10-bit data streams of a 40-bit virtual interface. Each data stream shall have an interface frequency of 148.5 MHz or 148.5/1.001 MHz. 4.4 HANC Horizontal Ancillary Data Space is the Ancillary Data Space located during the horizonta
35、l interval of a video line. The expressions HANC or HANC space are used interchangeably throughout the document. 4.5 Mapping Structure The term Mapping Structure defines the structure of the virtual interface which the image data are mapped onto. Different mapping structures are used according to th
36、e different sampling structures and pixel depths of the images. The Mapping Structure number, expressed as a roman numeral, changes according to sampling structure and pixel depth. The Mapping Structures I, II, III and IV used in this standard are based on rules defined in SMPTE ST372, as tabulated
37、in Table 1. The term Level A Mapping Structure 1 used in this standard is based on the rule defined in SMPTE ST 425-1. Table 1 Mapping Structure Cross Reference with SMPTE ST 372 Mapping Structure Section Number of SMPTE ST 372:2011 SMPTE ST 372 Section Heading I 5.1 4:2:2 (YCBCR)/10-bit Signals at
38、60, 60/1.001, 50, 48 and 48/1.001 Progressive Frame Rates II 5.2 4:4:4 (RGB) and 4:4:4:4 (RGB+A)/10-bit Signals at 30, 30/1.001, 25, 24 and 24/1.001 Frame Rates, PsF and at 60, 60/1.001 and 50 Field Rates 5.4.2 4:4:4 (YCBCR) and 4:4:4:4 (YCBCRA)/10-bit Multiplex Structure III 5.3 4:4:4 (RGB or XYZ)/
39、12-bit Signals at 30, 30/1.001, 25, 24 and 24/1.001 Frame Rates, PsF and 4:4:4 (RGB)/12-bit Signals at 60, 60/1.001 and 50 Field Rates* 5.4.3 4:4:4 (YCBCR)/12-bit Multiplex Structure IV 5.5 4:2:2:4 (YCBCRA)/12-bit Signals at 30, 30/1.001, 25, 24, 24/1.001 Frame Rates, PsF and at 60, 60/1.001 and 50
40、Field Rates Note: * Mapping Structure III used in this document does not apply to 4:4:4 (XYZ)/12-bit signals. 4.6 Sub Image A sub-division of a source image. 4.7 VANC Vertical Ancillary Data Space is the Ancillary Data Space located between SAV and EAV during the vertical interval of a video frame o
41、r field. The expressions VANC or VANC space are used interchangeably throughout the document. SMPTE ST 425-3:2015 Page 7 of 45 pages 5 Image Formats 5.1 1080-line Source Image Formats For this interface, the source data shall be an uncompressed 10-bit or 12-bit video signal corresponding to 1080-lin
42、e source image formats listed in Table 2. Table 2 1080-line Source Image Formats Mapping Structure (See Table 1) Reference SMPTE Standard Image Format Signal Format Sampling Structure/pixel Depth Frame Rate II ST 274 1920 1080 4:4:4 (RGB), 4:4:4:4 (RGB +A)/10-bit 50, 60/1.001 and 60 Progressive ST 2
43、048-2 2048 1080*2 4:4:4 (RGB*1), 4:4:4:4 (RGB*1+A)/10-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 274 1920 1080 4:4:4 (YCBCR), 4:4:4:4 (YCBCR+A)/10-bit 50, 60/1.001 and 60 Progressive ST 2048-2 2048 1080*2 4:4:4 (YCBCR), 4:4:4:4 (YCBCR+A)/10-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive
44、 III ST 274 1920 1080 4:4:4 (RGB)/12-bit 50, 60/1.001 and 60 Progressive ST 2048-2 2048 1080*2 4:4:4 (RGB*1)/12-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 274 1920 1080 4:4:4 (YCBCR)/12-bit 50, 60/1.001 and 60 Progressive ST 2048-2 2048 1080*2 4:4:4 (YCBCR)/12-bit 48/1.001, 48, 50, 60/1.00
45、1 and 60 Progressive IV ST274 1920 1080 4:2:2 (YCBCR)/12-bit 50, 60/1.001 and 60 Progressive ST2048-2 2048 1080*2 4:2:2 (YCBCR)/12-bit 48/1.001, 48,50, 60/1.001 and 60 Progressive ST 2048-2 2048 1080*2 4:2:2:4 (YCBCR +A)/12-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive Notes: *1 In this image fo
46、rmat RGB indicates either RGB or RFSGFSBFS. *2 This is the maximum pixel array, the active image may not fill the maximum array. SMPTE ST 425-3:2015 Page 8 of 45 pages 5.1.1 Source Sample Number Representation Each line of G, B and R or Y, CB and CR signals consists of a total of 2750, 2640 or 2200
47、samples each comprising 10 or 12 bits. The source samples are designated 0-2749, 0-2639 or 0-2199. For the 10-bit signals, the individual components of the nth sample are designated by suffixes such as, Gn or Yn. For 12-bit signals, the most significant 10 bits of the nth sample are designated by su
48、ffixes such as Gn:2-11 or Yn:2-11, and the least significant 2 bits of the nth sample are designated by suffixes such as Gn:0-1 or Yn:0-1. The least significant 2 bits of the RGB nth sample is designated by suffixes such as RGBn:0-1. The mth bit of each RGB component of the nth sample is designated by a suffix such as Gn:m. 5.2 2160-line Source Image Formats For this interface, the source data shall be an uncompressed 10-bit video signal corresponding to 2160-line image formats in Table 3. Table 3 2160-line Source Image Formats Reference SMPTE Standard I
