SMPTE ST 425-6-2014 Quad 3 Gb s Serial Digital Interface for Stereoscopic Image Transport.pdf

1、 Copyright 2014 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved February 20, 2014 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction 2 1 Scope 5 2 Conformance Notation 5 3 Normative References 5 4 Definit

2、ions . 6 5 Source Image Format . 6 6 Le and Re 40-Bit Virtual Interface Data Structure . 8 6.1 1080-Line Level A Mapping Mode . 8 6.1.1 Image Mapping Structures . 8 6.1.2 1080-Line Level A Mapping Mode Audio Data 8 6.1.3 1080-Line Level A Mapping Mode Time code Data . 8 6.1.4 Other Ancillary Data 9

3、6.2 1080-Line Level B-DL Mapping Mode . 9 6.2.1 Image Mapping Structures 9 6.2.2 1080-line Level B-DL Mapping Mode Audio Data 9 6.2.3 1080-line Level B-DL Mapping Mode Time code Data 9 6.2.4 Other Ancillary Data . 9 6.3 2160-Line Mapping Mode 10 6.3.1 Image Mapping Structures . 10 6.3.2 2160-Line Ma

4、pping Mode Audio Data 10 6.3.3 2160-Line Mapping Mode Time code Data . 10 6.3.4 Other Ancillary Data . 10 7 Payload Identifier 11 7.1 Byte 1 Digital Interface and Payload Identification . 11 7.2 Byte 2 Picture Rate . 11 7.3 Byte 3 Sampling Structure, Aspect Ratio and Horizontal Size . 11 7.4 Byte 4

5、Extended Aspects . 11 8 Data Stream Assignment for 3G-SDI Link 1 to 3G-SDI Link 4 12 8.1 3G-SDI Link Interface Timing 12 9 Levels of Operation (Informative) 13 Annex A Bibliography (Informative) . 14 Annex B Ancillary Data Capacity of the Quad Link Interface (Informative) . 15 Annex C SMPTE ST 425-6

6、 Document Roadmap (Informative). 16 Page 1 of 16 pages SMPTE ST 425-6:2014 SMPTE STANDARD Quad 3 Gb/s Serial Digital Interface for Stereoscopic Image Transport SMPTE ST 425-6:2014 Page 2 of 16 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recogni

7、zed 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 SMPTEs Technology Com

8、mittees. 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 its Standards Operation

9、s Manual. SMPTE ST 425-6 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 Engineering Document. However, attention is drawn to the possibility that some of t

10、he 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 Standard. There is a need in the industry to have an inter

11、face for transporting stereoscopic images complying with the 4:2:2 and 4:4:4 10-bit or 12-bit image formats referenced by SMPTE ST 425-3, each of which can be transported by a dual-link SMPTE ST 424 serial interface. Each Left Eye and Right Eye image is mapped onto four data streams according to the

12、 rules defined in SMPTE ST 425-3. The resulting eight data streams are then mapped into four 3G SDI links. Figure 1 gives an overview of the image mappings for 1080-line images and Figure 2 gives an overview of the image mappings for 2160-line images. SMPTE ST 425-6:2014 Page 3 of 16 pages Figure 1

13、Overview of the 1080-line Image Mapping D a t a S t r e a m O n eL e S o u r c e i m a g e( T a b l e 1 )D a t a S t r e a m T w oD a t a S t r e a m T h r e eD a t a S t r e a m F o u rS D IS D ID a t a S t r e a m O n eD a t a S t r e a m T w oD a t a S t r e a m O n eD a t a S t r e a m T w oS M

14、P T E S T 4 2 5 - 6 S M P T E S T 4 2 43 G - S D I L i n k 13 G - S D I L i n k 2L e S u b I m a g e 1L e S u b I m a g e 2S M P T E S T 4 2 4D a t a S t r e a m F i v eD a t a S t r e a m S i xS u b i m a g e s m a p p e d a c c o r d i n g t o S M P T E S T 4 2 5 - 3 L e v e l A o r L e v e l B -

15、D LD a t a S t r e a m S e v e nD a t a S t r e a m E i g h tR e S u b I m a g e 1R e S u b I m a g e 2L e a n d R e S o u r c e i m a g e s e a c h d i v i d e d i n t o t w oS u b I m a g e sS D IS D ID a t a S t r e a m O n eD a t a S t r e a m T w oD a t a S t r e a m O n eD a t a S t r e a m T

16、w oS M P T E S T 4 2 43 G - S D I L i n k 33 G - S D I L i n k 4S M P T E S T 4 2 4R e S o u r c e i m a g e( T a b l e 1 )SMPTE ST 425-6:2014 Page 4 of 16 pages Figure 2 Overview of the 2160-line Image Mapping This standard also defines the payload identifier that will identify the Left/Right (L/R)

17、 eye images, audio and other associated ancillary data. S D IS D ID a t a S t r e a m O n eD a t a S t r e a m T w oD a t a S t r e a m O n eD a t a S t r e a m T w oS M P T E S T 4 2 5 - 6 S M P T E S T 4 2 43 G - S D I L i n k 13 G - S D I L i n k 2S M P T E S T 4 2 4L e a n d R e S o u r c e i m

18、a g e s e a c h d i v i d e d i n t o f o u rS u b I m a g e s a s p e r S M P T E S T 4 2 5 - 3S D IS D ID a t a S t r e a m O n eD a t a S t r e a m T w oD a t a S t r e a m O n eD a t a S t r e a m T w oS M P T E S T 4 2 43 G - S D I L i n k 33 G - S D I L i n k 4S M P T E S T 4 2 4L e S o u r c

19、e i m a g e( T a b l e 2 )L e S u b I m a g e 1D a t a S t r e a m O n eL e S u b I m a g e 2D a t a S t r e a m T w oL e S u b I m a g e 3D a t a S t r e a m T h r e eL e S u b I m a g e 4D a t a S t r e a m F o u rR e S o u r c e i m a g e( T a b l e 2 )R e S u b I m a g e 1D a t a S t r e a m O n

20、 eR e S u b I m a g e 2D a t a S t r e a m T w oR e S u b I m a g e 3D a t a S t r e a m T h r e eR e S u b I m a g e 4D a t a S t r e a m F o u rSMPTE ST 425-6:2014 Page 5 of 16 pages 1 Scope This standard defines a means of transporting stereoscopic images (Left eye and Right eye images) using an

21、interface consisting of pairs of four data streams based on the SMPTE ST 425-3 data structures. The Left eye images are carried on four data streams of the interface and the Right eye images are carried on the other four data streams. The Left eye and Right eye images are each mapped onto the respec

22、tive four data streams in accordance with the mapping rules of SMPTE ST 425-3. The stereoscopic image formats to be transported using this standard are the 4:2:2 and 4:4:4 image formats enumerated in SMPTE ST 425-3. Mapping structures for the video essence and ancillary data are as defined in SMPTE

23、ST 425-3. This standard also defines the carriage of ancillary data such as the audio data, the audio control packets, the payload identifierand the time code. It is not necessary for implementations to include support for all image formats, nor is it a requirement to support both mapping modes to c

24、onform to this standard. Implementers are encouraged to indicate supported formats and supported mapping modes in commercial publications. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “shall“

25、, “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 is, by default, n

26、ormative, 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 permitted. The ke

27、ywords, “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 possibility or cou

28、rse 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 future. The keyword

29、“forbidden” indicates “reserved” and in addition indicates 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; Ta

30、bles shall be next; followed by formal languages; 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 standard. At the time of publication, the editions indicated were

31、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 12-2:2014, Transmission of Time Code in the Ancillary Data Space SMPTE ST 425-6:

32、2014 Page 6 of 16 pages SMPTE ST 352:2013, Payload Identification Codes for Serial Digital Interfaces SMPTE ST 425-3:2014, Image Format and Ancillary Data Mapping for the Dual Link 3 Gb/s Serial Interface 4 Definitions 4.1 HANC Horizontal Ancillary Data Space is the Ancillary Data Space located duri

33、ng the horizontal interval of a video line. The expressions HANC or HANC space are used interchangeably throughout the document 4.2 Stereoscopic Image Pair Two uncompressed images representing a Left eye (Le) image and a Right eye (Re) image which are coincident in time having identical sampling str

34、ucture, raster resolution, pixel depth and colorimetry. 4.3 VANC Vertical Ancillary Data Space is the Ancillary Data Space located between SAV and EAV during the vertical interval of a video frame or field. The expressions VANC or VANC space are used interchangeably throughout the document. 5 Source

35、 Image Format The source image formats shall be those 4:2:2 and 4:4:4, 10-bit or 12-bit image formats referenced by SMPTE ST 425-3, which can be transported by a dual-link SMPTE ST 424 serial interface as shown in Table 1 and Table 2. The Left eye image and the Right eye image shall have the identic

36、al image pixel format structure and they shall be a stereoscopic image pair. For the carriage of stereo production image formats, the source image horizontal and vertical data structure for each Left eye (Le) and Right eye (Re), shall be as defined for those formats referenced by SMPTE ST 425-3. Tab

37、le 1 and Table 2 repeated from SMPTE ST 425-3 for convenience show the source formats so referenced. SMPTE ST 425-6:2014 Page 7 of 16 pages Table 1 1080-line Source Image Formats from SMPTE ST 425-3 (Informative) Reference SMPTE Standard Image Format Signal Format Sampling Structure/pixel Depth Fram

38、e Rate ST 274 19201080 4:4:4 (RGB), 4:4:4:4 (RGB +A)/10-bit 50, 60/1.001 and 60 Progressive ST 2048-2 20481080*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 19201080 4:4:4 (YCBCR), 4:4:4:4 (YCBCR+A)/10-bit 50, 60/1.001 and 60 Progressive ST 2048-2 204

39、81080*2 4:4:4 (YCBCR), 4:4:4:4 (YCBCR+A)/10-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 274 19201080 4:4:4 (RGB)/12-bit 50, 60/1.001 and 60 Progressive ST 2048-2 20481080*2 4:4:4 (RGB*1)/12-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 274 19201080 4:4:4 (YCBCR)/12-bit 50, 60/1.001 a

40、nd 60 Progressive ST 2048-2 20481080*2 4:4:4 (YCBCR)/12-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 274 19201080 4:2:2 (YCBCR)/12-bit 50, 60/1.001 and 60 Progressive ST 2048-2 20481080*2 4:2:2 (YCBCR)/12-bit 48/1.001, 48,50, 60/1.001 and 60 Progressive ST 2048-2 20481080*2 4:2:2:4 (YCBCR+A)

41、/12-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive Notes: *1 In this image, format RGB indicates either RGB or RFSGFSBFS. *2 This is the maximum pixel array; the active image may not fill the maximum array. Table 2 2160-line Source Image Formats from SMPTE ST 425-3 (Informative) Reference SMPTE S

42、tandard Image Format Signal Format Sampling Structure/Pixel Depth Frame Rate ST 2036-1 38402160 4:2:2 (YCBCR), 4:2:0 (YCBCR)/10-bit 24/1.001, 24, 25, 30/1.001 and 30 Progressive ST 2048-1 40962160 4:2:2 (YCBCR)/10-bit 24/1.001, 24, 25, 30/1.001 and 30 Progressive SMPTE ST 425-6:2014 Page 8 of 16 pag

43、es 6 Le and Re 40-Bit Virtual Interface Data Structure Each Le and Re image of the stereoscopic image pair shall be constructed as a 40 bit virtual interface, consisting of four 10-bit data streams data stream one, data stream two, data stream three and data stream four. For 1080-line images, the 40

44、-bit virtual interfacefor each Le and Re image shall be constructed in accordance with either the Level A, or the Level B-DL mappings defined in SMPTE ST 425-3. For 2160-line images, the 40-bit virtual interfacefor each Le and Re image shall be constructed in accordance with the 2160-line mapping de

45、fined in SMPTE ST 425-3. Refer to SMPTE ST 425-3 for details of the mapping structures and mapping modes for each format. 6.1 1080-Line Level A Mapping Mode 6.1.1 Image Mapping Structures The 1080-line source images shall be mapped into the 40-bit virtual interface of each Le and Re image according

46、to the Level A mapping rules defined in SMPTE ST 425-3. 6.1.2 1080-Line Level A Mapping Mode Audio Data When present, audio data shall be mapped into the HANC space of the Le and Re virtual interface, according to the Level A audio mapping rules defined in SMPTE ST 425-3 which specifies the number o

47、f audio channels that can be mapped into each Le and Re virtual interface. The audio data shall be mapped onto the Le virtual interface first and any remaining data shall then be mapped onto the Re virtual interface. In some applications, audio data of the Le interface may be duplicated in the Re in

48、terface. Audio channel usage shall be further signaled using the payload identifier as defined in Section 7 of this document. In the case where the Re interface is carrying a duplicate of the Le interface audio, the audio data and control packets shall be an exact replica of the audio carried in the

49、 Le interface specifically the Re interface audio shall use the same audio groups as applied to the Le interface audio. The payload identifier associated with each Le and Re interface shall indicate whether the audio data contained in the Re interface is a copy of the Le interface audio, or whether additional audio channels are being carried in the Re interface. Using a