1、 Copyright 2012 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved January 30, 2012 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction 2 1 Scope . 3 2 Conformance Notation . 3 3 Normative References . 34 Sou
2、rce Format and 10-Bit Interface Data Structure 4 4.1 Payload Identifier Mapping 5 4.2 Audio and Other Ancillary Data Mapping 5 5 Dual Stream Mapping of Stereoscopic Images 5 Annex A Bibliography (Informative) . 6 Annex B SMPTE ST 425-2 Document Road Map (Informative) 7 Page 1 of 7 pages SMPTE ST 425
3、-2:2012 SMPTE STANDARD Source Image Format and Ancillary Data Mapping for Stereoscopic Image Formats on a Single-Link 3 Gb/s Serial Interface SMPTE ST 425-2:2012 Page 2 of 7 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards devel
4、oping 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 Committees. Participat
5、ion 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 Part XIII of its Administrative Practices.
6、 SMPTE ST 425-2 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 Standard. However, attention is drawn to the possibility that some of the elements of this d
7、ocument 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. There is a need in the acquisition, production and post-p
8、roduction segments of the industry to have an interface for transporting stereoscopic images complying with 4:2:2 10 bit image formats that have a payload capacity of nominally 1.5 Gb/s defined by SMPTE ST 274, SMPTE ST 2048-2 and SMPTE ST 296. SMPTE ST 292-2 defines a means of transporting these st
9、ereoscopic images over 2 1.5 Gb/s (nominal) serial interfaces. This standard defines the mapping of the stereo image formats referenced in SMPTE ST 292-2 into a single 3 Gb/s (nominal) serial interface, including a payload identifier that will identify the Left Eye and Right Eye (Le and Re) images,
10、audio and other associated ancillary data. SMPTE ST 425-2:2012 Page 3 of 7 pages 1 Scope This standard defines a means of transporting a stereoscopic image pair consisting of a Left Eye and Right Eye image (Le and Re) using an interface consisting of a single 3 Gb/s (nominal) link. The stereoscopic
11、image formats to be transported using this standard are those 4:2:2 10-bit image formats having a sampling frequency of 74.25 MHz or 74.25/1.001 MHz Audio and other associated ancillary data may also be transported. This standard also defines a payload identifier. It is not necessary for implementat
12、ions to include support for all formats defined in this standard to be compliant. 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
13、 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
14、 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
15、 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
16、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
17、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
18、“) 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
19、tive definition; Tables 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 editi
20、ons 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 292-1:2012, 1.5 Gb/s Signal/Data Serial Interface SMPTE ST 42
21、5-2:2012 Page 4 of 7 pages SMPTE ST 292-2:2011, Dual 1.5 Gb/s Serial Digital Interface for Stereoscopic Image Transport SMPTE ST 425-1:2011, Source Image Format and Ancillary Data Mapping for the 3 Gb/s Serial Interface 4 Source Format and 10-Bit Interface Data Structure For this standard, the sourc
22、e image formats for each Left Eye (Le) and Right Eye (Re) stereoscopic image pair, shall be all of the formats referenced by SMPTE ST 292-2. Table 1 repeated from SMPTE ST 292-2 for convenience shows the source formats so referenced. The 10-bit interface data structure shall be constructed in confor
23、mance with the interleaved data stream defined in SMPTE ST 292-1, for those formats so referenced by SMPTE ST 292-2. Table 1 Source Image Formats referenced by SMPTE ST 292-2 (Informative) Reference SMPTE Standard Image Format Signal Format Sampling Structure/Pixel Depth Frame/Field Rates Transport
24、ST 274 1920 1080 4:2:2 (YCBCR60, 60/1.001 and 50 Fields Interlaced )/10-bit Interlaced 30, 30/1.001, 25, 24 and 24/1.001 Frames Progressive Progressive 30, 30/1.001, 25, 24 and 24/1.001 PsF PsFST 2048-2 *12048 x 1080 4:2:2 (YC*2BCR60, 60/1.001 and 50 Fields Interlaced )/10-bit Interlaced 30, 30/1.00
25、1, 25, 24 and 24/1.001 Progressive Progressive 30, 30/1.001, 25, 24 and 24/1.001 PsF PsFST 296 *11280 x 720 4:2:2 (YCBCR60, 60/1.001, 50, 30, 30/1.001, 25, 24 and 24/1.001 Frames Progressive )/10-bit Progressive *1PsF structure as defined in SMPTE ST 274 *2 This is the maximum pixel array, the activ
26、e image may not fill the maximum array. NOTE: Not all formats referenced in indicated reference documents are shown for example 4:4:4 sampling is not supported. It should also be noted that the image formats enumerated in the above table represent uncompressed video source data only. As such this st
27、andard supports a subset of the source data formats defined in SMPTE ST 425-1 Level B-DS mapping. Each Le and Re image of the stereoscopic image pair shall be of the same format and structure and shall be constructed as an individual 10-bit interface in accordance with SMPTE ST 292-2. The 10-bit int
28、erfaces so constructed shall contain timing reference code words (SAV/EAV), line numbers and line based CRCs as defined in SMPTE ST 292-1 and/or the source image format document. Each parallel 10-bit interface shall be frame, line and word aligned, having an interface frequency of 148.5 MHz or 148.5
29、/1.001 MHz as shown in Figure 1. SMPTE ST 425-2:2012 Page 5 of 7 pages 10-bit intreface in accordance withST 292-1Left Eye (Le) imageInterface clock frequency 148.5 MHz or 148.5/1.001 MHzRight Eye (Re) imageInterface clock frequency 148.5 MHz or 148.5/1.001 MHz10-bit interface in accordance withST 2
30、92-1ANC Data Active ImageSAVCRCLNEAV000 (C)000 (Y)XYZ (C)XYZ (Y)LN0 (C)LN0 (Y)LN1 (C)XYZ (C)LN1 (Y)XYZ (Y)3FF (C)3FF (Y)000 (C)000 (Y)CCR0YCR0CCR1YCR1000 (Y)000 (C)000 (Y)000 (C)3FF (Y)3FF (C)CBdataY data CRdataY data Data (C)Data (Y)Data (C)Data (Y)000 (C)000 (Y)XYZ (C)XYZ (Y)LN0 (C)LN0 (Y)LN1 (C)X
31、YZ (C)LN1 (Y)XYZ (Y)3FF (C)3FF (Y)000 (C)000 (Y)CCR0YCR0CCR1YCR1000 (Y)000 (C)000 (Y)000 (C)3FF (Y)3FF (C)CBdataY data CRdataY data Data (C)Data (Y)Data (C)Data (Y)Figure 1 Example of SMPTE ST 292-2 Stereoscopic 10-bit interface 4.1 Payload Identifier Mapping The payload identifier shall be mapped o
32、nto each Le and Re 10-bit interface of the stereoscopic image pair. The recommended location of the payload identifier shall be as defined in ST 292-1, and Bytes 2, 3 and 4 of the payload identifier shall be in conformance with the picture rate, sampling structure, aspect ratio, and bit depth etc. a
33、s defined in SMPTE ST 292-2. Byte 1 of the payload identifier shall be as defined in Table 2 below. Table 2 Payload and Digital Interface Identification for the mapping of stereo the 3 Gb/s Serial Digital Interface Mapping Nomenclature Byte 1: Payload and Digital Interface Stereoscopic 720-line vide
34、o payloads on a 3 Gb/s serial digital interface 8Eh Stereoscopic 1080-line video payloads on a 3 Gb/s serial digital interface 8Fh 4.2 Audio and Other Ancillary Data Mapping When present, ancillary data including audio data, shall be mapped into the Le and Re 10-bit interface of the stereoscopic ima
35、ge pair in conformance with SMPTE ST 292-2. 5 Dual Stream Mapping of Stereoscopic Images The Le and Re 10-bit interfaces so constructed shall be mapped into the 20-bit Virtual Interface defined in SMPTE ST 425-1, in accordance with the Level B-DS (Dual Stream) mapping rules. The Le interface shall b
36、e mapped into data stream 1 of the virtual interface and the Re interface shall be mapped into data stream 2 of the virtual interface. In accordance with SMPTE ST 292-2, the timing difference between the serial digital clocks and EAV / SAV alignment of the Left eye stream and the Right eye stream ma
37、y differ by up to 400 ns at the source. Further delays may occur within a system configuration. Any such timing difference shall be corrected prior to mapping into the virtual interface of this standard. This requirement in conjunction with the requirements defined in Section 4 of this standard, ens
38、ures that the Le and Re images are frame aligned when carried on the 3 Gb/s link. The frame alignment of source images in this standard differs from the general requirements defined for the Level B-DS mapping rules as described in SMPTE ST 425-1. SMPTE ST 425-2:2012 Page 6 of 7 pages Annex A Bibliog
39、raphy (Informative) Note: All references in this document 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 sa
40、me root number (e.g. 274) and publication year (e.g. 2008) are functionally identical. SMPTE ST 274:2008, Television 1920 x 1080 Image Sample Structure, Digital Representation and Digital Timing Reference Sequences for Multiple Picture Rates SMPTE ST 291:2011, Ancillary Data Packet and Space Formatt
41、ing SMPTE ST 296:2011, 1280 x 720 Progressive Image Sample Structure Analog and Digital Representation and Analog Interface SMPTE ST 299-1:2009, 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface SMPTE ST 352:2011, Payload Identification Codes for Serial Digital Interfaces SMPTE ST 2048-
42、1:2011, 2048 1080 and 4096 2160 Digital Cinematography Production Image Formats FS/709 SMPTE ST2048-2:2011, 2048 1080 Digital Cinematography Production Image FS/709 Formatting for Serial Digital Interface SMPTE ST 425-2:2012 Page 7 of 7 pages Annex B SMPTE ST 425-2 Document Road Map (Informative) Th
43、is road map shows the relations between SMPTE ST 425-2 and its normative reference documents. SMPTE ST 425-2 Mapping Stereo Image Formats Into a Single Link 3Gb/s InterfaceSMPTE ST 292-2 Dual 1.5Gb/s Serial Digital Interface for Stereoscopic Image TransportSMPTE ST 297 3Gb/s Optical LinkSMPTE ST 424
44、 3Gb/s Signal / Data Serial InterfaceSMPTE ST 425-1Source Image Format and Ancillary Data Mapping for the 3Gb/s Serial InterfaceThis StandardNormative Reference DocumentsSMPTE ST 292-1 1.5Gb/s Serial Digital Interface Application DocumentsSMPTE ST 274 1920 x 1080 Image Formats SMPTE ST 296 1280 x 720 Image Formats SMPTE ST 2048-2 2048 x 1080 Image Formats Physical InterfaceSMPTE ST 291ANC PacketSMPTE ST 299-1Embedded AudioSMPTE ST 12-1 / -2TimecodeSMPTE ST 352Payload IDSMPTE ST 20512 Frame Marker
