SMPTE ST 425-5-2015 Image Format and Ancillary Data Mapping for the Quad Link 3 Gb s Serial Interface.pdf

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 SMPTE STANDARD Image Format and Ancillary Data Mapping for the Quad Link 3 Gb/s Serial Interface Page 1 of 28 pages Table of Contents Page Foreword

2、 2 Intellectual Property . 2 Introduction 2 1 Scope 3 2 Conformance Notation 3 3 Normative References 4 4 Definition of Terms . 4 5 Image Formats . 5 5.1 2160-Line Source Image Formats 5 5.2 Image Mapping Overview . 6 5.2.1 2160-Line Image Division into Four Sub Images . 7 5.2.2 Mapping the Sub Imag

3、es Overview 7 5.3 Number of Audio Channels 8 6 Level A Mapping for 2160-Line Source Images . 9 6.1 Level A Mapping of the Source Image 9 6.2 Ancillary Data 10 6.2.1 Audio Data . 11 6.2.2 Time Code Data . 13 6.2.3 Payload Identifier . 13 7 Level B Dual-Link Mapping for 2160-Line Source Images . 16 7.

4、1 Level B Dual-Link Mapping of the Source Image . 16 7.2 Ancillary Data 17 7.2.1 Audio Data . 18 7.2.2 Time Code Data 20 7.2.3 Payload Identifier . 20 8 Data Stream Assignment for 3G-SDI Link 1 to 3G-SDI Link 4 . 23 8.1 3G-SDI Link Interface Timing . 23 9 Levels of Operation (Informative) . 23 Annex

5、 A Bibliography (Informative) 24 Annex B Square Division of 2160-Image Formats (Informative) 25 B.1 Level A Mapping 25 B.2 Level B Dual Link Mapping 26 Annex C Ancillary Data Capacity of the Quad Link Interface (Informative) . 27 Annex D Document Roadmap (Informative) 28 SMPTE ST 425-5:2015 Revision

6、 of SMPTE ST 425-5:2014 SMPTE ST 425-5:2015 Page 2 of 28 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 coun

7、tries 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 cooperates closely with other s

8、tandards-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 425-5 was prepared by Technology Committee 32NF. Intellectual Property At the time of publication no notice had been

9、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 identifying any or all such pa

10、tent rights. Introduction This section 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 2160-line images complying with the 4:2:0, 4:2:2 and 4:4:4 10-bit and 12-bit image formats defined by

11、SMPTE ST 2048-1 and SMPTE ST 2036-1 which can be transported by a quad link SMPTE ST 424 serial interface. This standard also defines the payload identifier. SMPTE ST 425-5:2015 Page 3 of 28 pages 1 Scope This standard defines the mapping of the image formats of 38402160 and 40962160 pixels listed i

12、n Table 1 into eight parallel 10-bit data streams (known as data stream one, data stream two, data stream three, data stream four, data stream five, data stream six, data stream seven and data stream eight) of an 80-bit virtual interface, followed by the mapping of these eight 10-bit data streams on

13、to the Quad Link 3 Gb/s Serial Interface (3G-SDI Link 1, Link 2, Link 3 and Link 4) via four 20-bit virtual interfaces. This standard also defines the carriage of ancillary data such as the audio data, the audio control packets, the Payload Identifier and the time code. It is not necessary for imple

14、mentations 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 describes elements of the design that are indispensable or contains the conformance language

15、 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. Informative text does not contain any conformance keywords. All text in this document

16、 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 strictly to be followed in order to conform to the document and from which no deviation is

17、 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 is preferred but not necessarily required; or that (in the negative form) a certain

18、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 provision that is not defined at this time, shall not be used, and may be defined in the fu

19、ture. 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 mandatory provisions (“shall“) and, if implemented, all recommended provisions (“should

20、“) 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 information in this document shall be as follows: Normative prose shall be the authorita

21、tive definition; Tables shall be next; followed by formal languages; then figures; and then any other language forms. SMPTE ST 425-5:2015 Page 4 of 28 pages 3 Normative References Note: All references in this document to other SMPTE documents use the current numbering style (e.g. SMPTE ST 274:2008)

22、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. 2008) are functionally identical. The following standards contain provisions that, thro

23、ugh 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 standard are encouraged to investigate the possibility of applying the most recent edition

24、 of the standards indicated below. SMPTE ST 12-2:2014, Transmission of Time Code in the Ancillary Data Space SMPTE ST 274:2008, Television 19201080 Image Sample Structure, Digital Representation and Digital Timing Reference Sequences for Multiple Picture Rates SMPTE ST 292-1:2012, 1.5 Gb/s Signal/Da

25、ta 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 Interfaces SMPTE ST 352:2013, Payload Identification Codes for Serial Digital Interfaces SMPT

26、E ST 372:2011, Dual Link 1.5 Gb/s Digital Interface for 19201080 and 20481080 Picture Formats SMPTE ST 425-1:2014, Source Image Format and Ancillary Data Mapping for the 3 Gb/s Serial Interface SMPTE ST 435-1:2012, 10 Gb/s Serial Signal/Data Interface Part 1: Basic Stream Derivation SMPTE ST 2036-1:

27、2014, Ultra High Definition Television Image Parameter Values for Program Production SMPTE ST 2048-1:2011, 20481080 and 40962160 Digital Cinematography Production Image Formats FS/709 SMPTE ST 2048-2:2011, 20481080 Digital Cinematography Production Image FS/709 Formatting for Serial Digital Interfac

28、e 4 Definition of Terms This section defines terms used in this document. 4.1 3G-SDI Link 1/ 3G-SDI Link 2/3G-SDI Link 3/ 3G-SDI Link 4 Each of the four links that together compose the Quad Link 3 Gb/s Serial Interface. 4.2 Alpha Channel An application dependent auxiliary component that is related t

29、o 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 425-5:2015 Page 5 of 28 pages 4.3 Data stream one / data stream two / data stream three / data stream four/data stream five / da

30、ta stream six / data stream seven / data stream eight Eight parallel 10-bit data streams of an 80-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 horizon

31、tal 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

32、the different sampling structures and pixel depths of the images. The Mapping Structures 1, 2, 3 and 4 used in this standard are based on rules defined in SMPTE ST425-1. The Mapping Structures I, II, III and IV used in this standard are defined in SMPTE ST 425-1. 4.6 Sub Image A sub-division of a so

33、urce 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 or field. The expressions VANC or VANC space are used interchangeably throughout the document. 5 Image Formats 5.1 2160-Line Source Image Formats F

34、or this interface, the source data shall be an uncompressed 10-bit or 12-bit video signal corresponding to 2160-line source image formats listed in Table 1. SMPTE ST 425-5:2015 Page 6 of 28 pages Table 1 2160-line Source Image Formats Reference SMPTE Standard Image Format Signal Format Sampling Stru

35、cture/pixel Depth Frame Rate Sub Image Level A Mapping Structure Sub Image Level B-DL Mapping Structure ST 2036-1 38402160 4:2:2 (YCBCR), 4:2:0 (YCBCR)/10-bit 50, 60/1.001 and 60 Progressive 1 I ST 2048-1 40962160*2 4:2:2 (YCBCR)/10-bit 48/1.001, 48, 50, 60/1.001 and 60 Progressive ST 2036-1 3840216

36、0 4:4:4 (RGB) 24/1.001, 24, 25, 30/1.001 and 30 Progressive 2 II ST 2048-1 40962160*2 4:4:4 (RGB*1), 4:4:4:4 (RGB*1+A)/10-bit ST 2036-1 38402160 4:4:4 (YCBCR) ST 2048-1 40962160*2 4:4:4 (YCBCR), 4:4:4:4 (YCBCR+A)/10-bit ST 2036-1 38402160 4:4:4 (RGB)/12-bit 3 III ST 2048-1 40962160*2 4:4:4 (RGB*1)/1

37、2-bit ST 2036-1 38402160 4:4:4 (YCBCR)/12-bit ST 2048-1 40962160*2 4:4:4 (YCBCR)/12-bit ST 2036-1 38402160 4:2:2 (YCBCR)/12-bit 4 IV ST 2048-1 40962160*2 4:2:2 (YCBCR)/12-bit ST 2048-1 40962160*2 4:2:2:4 (YCBCR+A)/12-bit Notes: *1 In this image format RGB indicates either RGB or RFSGFSBFS. An additi

38、onal Color VANC packet to describe the FS characteristics is defined by SMPTE ST 2048-1. *2 This is the maximum pixel array, the active image may not fill the maximum array. 5.2 Image Mapping Overview The source images are mapped onto a 80-bit virtual interface, consisting of eight 10-bit data strea

39、ms data stream one, data stream two, data stream three, data stream four, data stream five, data stream six, data stream seven and data stream eight. The each pair of data streams compose the 20-bit virtual interface as defined in SMPTE ST 425-1. Data stream one and data stream two compose data stre

40、am one and data stream two, respectively, of the first 20-bit virtual interface which is then multiplexed into a serial bit stream 3G-SDI Link 1 according to SMPTE ST 424. Data stream three and data stream four compose the second 20-bit virtual interface which is then multiplexed into a serial bit s

41、tream 3G-SDI Link 2. Data stream five and data stream six compose the third 20-bit virtual interface which is then multiplexed into a serial bit stream 3G-SDI Link 3. Data stream seven and data stream eight the fourth 20-bit virtual interface which is then multiplexed into a serial bit stream 3G-SDI

42、 Link 4. SMPTE ST 425-5:2015 Page 7 of 28 pages 5.2.1 2160-Line Image Division into Four Sub Images The active area of the 2160-line source images listed in Table 1 shall be divided and mapped into the active area of four Sub-Images (i.e. Sub Image 1 through 4) of the same frame rate as the source i

43、mage using the 2-sample interleave division method, as defined in SMPTE ST 435-1. Each Sub Image of the 38402160 and 40962160 source images has the same structure as images of the corresponding frame rate defined in SMPTE ST274 and SMPTE ST 2048-2 as shown in Table 2. Even lines of the source image

44、are divided into the Sub Image 1 and 2 as per 2 consecutive horizontal samples, and odd lines of the source image are divided into the Sub Image 3 and 4 as per 2 consecutive horizontal samples. The 2-sample interleave division method and mapping into the four Sub Images is illustrated in Figure 1. T

45、he sample structures of Sub Images divided from the 4:4:4 or 4:2:2 source images are 4:4:4 or 4:2:2, respectively. The sample structure of Sub Images 1 and 2 divided from the 4:2:0 source image is 4:2:2. The sample structure of Sub Images 3 and 4 divided from the 4:2:0 source image is regarded as 4:

46、2:2 in which even-numbered samples on odd-numbered lines of unassigned CBCR shall be assigned 200h in the case of a 10-bit system and 800h in the case of a 12-bit system as defined in SMPTE ST 435-1. Table 2 Sub Image Formats Source Image Sub Image Reference SMPTE Standard Image Format Reference SMP

47、TE Standard Image Format ST 2036-1 38402160 ST 274 19201080 ST 2048-1 40962160 ST 2048-2 20481080 00 3 8 3 9 / 4 0 9 52 1 5 91 9 2 0 / 2 0 4 8 2 1 9 9 0 1 9 1 9 / 2 0 4 714 11 1 2 21 1 2 54 2S u b I m a g e 1( S y s t e m 2 . 1 2 . 5 )EAVSAVH A N CD a t aS u b I m a g e 2( S y s t e m 2 . 1 2 . 5 )E

48、AVSAVH A N CD a t aS u b I m a g e 3( S y s t e m 2 . 1 2 . 5 )EAVSAVH A N CD a t aEAVSAVH A N CD a t a1 21 2 1 21 23 43 4 3 43 41 21 2 1 21 23 43 4 3 43 41 21 2 1 21 23 43 4 3 43 4S u b I m a g e 1S u b I m a g e 2S u b I m a g e 3S u b I m a g e 4Figure 1 2-sample interleave division to Sub Image

49、1 through 4 5.2.2 Mapping the Sub Images Overview With the Level A mapping, each Sub Image is then mapped into two 10-bit data streams as defined in SMPTE ST 425-1 Level A Mapping Structures. Sub Image 1 is mapped into data stream one and data stream two. Sub Image 2 is mapped into data stream three and data stream four. Sub Image 3 is mapped into data stream five an