1、 Copyright 2011 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue., White Plains, NY 10601 (914) 761-1100 Approved June 8, 2011 Table of Contents Page Introduction . 2 Intellectual Property 2 Introduction . 2 1 Scope . 3 2 Conformance Notation . 3 3 Normative References . 3 4
2、 Source Format and Interface Data Structure. 4 5 Left/Right Eye Image, Audio and Ancillary Data Mapping. 5 6 Payload Identifier . 5 6.1 Payload Identifier Structure 5 Annex A Bibliography (Informative) . 9 Annex B SMPTE ST 292-2 Document Road Map (Informative) 10 Page 1 of 10 pages SMPTE ST 292-2:20
3、11SMPTE STANDARD Dual 1.5 Gb/s Serial Digital Interface for Stereoscopic Image Transport SMPTE ST 292-2:2011 Page 2 of 10 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally-recognized standards developing organization. Headquartered and incorporated i
4、n 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. Participation in these Committees is open to all with a bona f
5、ide 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. SMPTE ST 292-2 was prepared by Technology Committee
6、 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 document may be the subject of patent rights. SMPTE s
7、hall 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 industry to have an interface for the transporting of stereoscopic images complying wi
8、th 4:2:2/10-bit image formats defined by SMPTE ST 274, SMPTE ST 2048-2 and SMPTE ST 296, which can be transported by a single SMPTE ST 292-1 serial interface. This standard also defines the payload identifier that will identify the Left/Right (L/R) eye images, audio and other associated ancillary da
9、ta. This standard provides explicit labeling for 16:9 aspect ratios. Unknown aspect ratios are signaled with no further details. SMPTE ST 292-2:2011 Page 3 of 10 pages 1 Scope This standard defines a means of transporting stereoscopic images (Left eye and Right eye images) using an interface consist
10、ing of two streams based on the SMPTE ST 292-1 data structure. The Left eye images are carried on one stream of the interface and the Right eye images are carried on the other stream. The stereoscopic image formats to be transported using this standard are the 4:2:2/10-bit image formats defined by S
11、MPTE ST 274, SMPTE ST 2048-2 and SMPTE ST 296, which can be transported by a single SMPTE ST 292-1 serial interface. Audio and other associated ancillary data may also be transported. This standard also defines a payload identifier. 2 Conformance Notation Normative text is text that describes elemen
12、ts 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. Informati
13、ve 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 strictly to be
14、 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 is prefe
15、rred 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 provision that
16、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. Unless otherwise specified, the order of precedence of the types of normative information i
17、n 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. 3 Normative References Note: All references in this document to other SMPTE documents use the current numbe
18、ring style (e.g. SMPTE ST 12-2:2008) although, during a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 12M-2-2008). Documents with the same root number (e.g. 12-2) and publication year (e.g. 2008) are functionally identical. The following
19、standards contain provisions which, through reference in this text, constitute provisions of this recommended practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this recommended practice are encouraged to
20、 investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE ST 12-2:2008, Television Transmission of Time Code in the Ancillary Data Space SMPTE ST 291:2010, Ancillary Data Packet and Space Formatting SMPTE ST 292-2:2011 Page 4 of 10 pages SMPTE ST 292-1:
21、2011, 1.5 Gb/s Signal/Data Serial Interface SMPTE ST 297:2006, Television Serial Digital Fiber Transmission System for SMPTE ST 259, SMPTE ST 344, SMPTE ST 292-1 and SMPTE ST 424 Signals SMPTE ST 299-1:2009, 24-Bit Digital Audio Format for SMPTE 292 Bit-Serial Interface (NOTE: This document previous
22、ly numbered SMPTE 299-2009 Content Unchanged) SMPTE ST 352:2011, Payload Identification Codes for Serial Digital Interfaces 4 Source Format and Interface Data Structure This interface for stereoscopic images shall carry the Left eye and the Right eye images along with associated audio and ancillary
23、data packets as two separate streams The source image formats shall be the 4:2:2/10-bit image formats referenced by SMPTE ST 292-1, which can be transported by a single SMPTE ST 292-1 serial interface as shown in Table 1. The Left eye image and the Right eye image shall have the identical image pixe
24、l format structure and they shall be a stereo image pair. The electrical or optical characteristics of each stream of the interface shall be in conformance with SMPTE ST 292-1 or SMPTE ST 297, respectively. Table 1 Source Image Formats Reference SMPTE Standard Image Format Signal Format Sampling Str
25、ucture/Pixel Depth Frame/Field Rates Transport 60, 60/1.001 and 50 Fields Interlaced Interlaced 30, 30/1.001, 25, 24 and 24/1.001 Frames Progressive Progressive ST 274 1920 1080 4:2:2 (YCBCR)/10-bit 30, 30/1.001, 25, 24 and 24/1.001 PsF PsF*160, 60/1.001 and 50 Fields Interlaced Interlaced 30, 30/1.
26、001, 25, 24 and 24/1.001 Progressive Progressive ST 2048-2 2048 x 1080*24:2:2 (YCBCR)/10-bit 30, 30/1.001, 25, 24 and 24/1.001 PsF PsF*1ST 296 1280 x 720 4:2:2 (YCBCR)/10-bit 60, 60/1.001, 50, 30, 30/1.001, 25, 24 and 24/1.001 Frames Progressive Progressive *1 PsF structure as defined in SMPTE ST 27
27、4. *2 This is the maximum pixel array, the active image may not fill the maximum array. SMPTE ST 292-2:2011 Page 5 of 10 pages 5 Left/Right Eye Image, Audio and Ancillary Data Mapping One stream of this interface shall carry a Left eye image and the other stream shall carry a Right eye image. The im
28、ages on the Left eye stream and the Right eye stream shall be a stereo image pair. Both streams shall be identified by the payload identifier defined in 6. The timing difference between the serial digital clocks and EAV / SAV of the Left eye stream and the Right eye stream shall not exceed 400 ns at
29、 the source. This difference should be taken into consideration when designing systems and destination equipment input stages. When present, audio data shall be mapped into the ancillary data space of the Left eye stream in conformance with SMPTE ST 299-1. Audio may also be mapped into the ancillary
30、 data space of the Right eye stream. The Right eye audio may be a copy of the Left eye audio, or it may contain additional channels. When present the time code shall be mapped into the ancillary data space of the Left eye stream in conformance with SMPTE ST 12-2. When present the timecode should als
31、o be mapped into the Right eye stream in which case the corresponding Time Address values shall be identical between the two streams. When present, ancillary data shall be mapped into the ancillary data space of the Left or the Right eye streams and shall be in conformance with SMPTE ST 291. Ancilla
32、ry data specifically intended for the Right or Left eye stream shall be inserted into the appropriate stream. 6 Payload Identifier The payload identifier data structure shall be in conformance with SMPTE ST 352 and shall be mapped onto each stream of the interface to identify the Left/Right eye imag
33、es, picture frame rate, sampling structure, etc. Payload ID packets shall be inserted into the Y channel of the data stream of each stream. The recommended payload location is defined in SMPTE ST 292-1. 6.1 Payload Identifier Structure The payload identifier shall be 4 bytes where each byte has a se
34、parate significance. The first byte of the payload identifier shall have the highest significance and subsequent bytes shall define lower order video and ancillary payload information. SMPTE ST 292-2:2011 Page 6 of 10 pages Table 2 Payload Identifier Bits Byte 1 Byte 2 Byte 3 Byte 4 Bit 7 1 Interlac
35、ed (0h) or progressive (1h) transport Reserved (0h) Bit 6 0 Interlaced (0h) or progressive (1h) picture Horizontal pixel count 1920 (0h) 1280 (2h) or 2048 (1h) Reserved (3h) Stream assignment Left eye stream (0h) or Right eye stream (1h) Bit 5 1 Reserved Aspect Ratio 16:9(1h) Unknown (0h) Reserved (
36、0h) Bit 4 1 Reserved Reserved Reserved (0h) Bit 3 0 Bit 2 0 Right eye stream, audio not present or status unknown (0h) Right eye stream carries a copy of Left eye audio (1h) Right eye stream carries additional channels (2h) Reserved (3h) Bit 1 0 Bit 0 1 Picture rate see Table 3 Sampling structure se
37、e Table 4 Bit depth Reserved (0h), 10-bit (1h), Reserved (2h b5 = (0h) shall identify an image with unknown aspect ratio b5 = (1h) shall identify an image with a 16x9 aspect ratio Bit b4 is reserved and shall be set to (0h) Bits b3 to b0 of byte 3 shall identify the sampling structure in accordance
38、with Table 4. This standard shall be constrained to value (0h). The sampling structure is defined in SMPTE ST 352. Table 4 Sampling Structure Value Sampling Value Sampling Value Sampling Value Sampling 0h 4:2:2 (YCBCR) 1h 4:4:4 (YCBCR) 2h 4:4:4 (GBR) 3h 4:2:0 4h 4:2:2:4 (YCBCRA) 5h 4:4:4:4 (YCBCRA)
39、6h 4:4:4:4 (GBRA) 7h SMPTE ST 2048-2 FS18h 4:2:2:4 (YCBCRD) 9h 4:4:4:4 (YCBCRD) Ah 4:4:4:4 (GBRD) Bh Reserved Ch Reserved Dh Reserved Eh 4:4:4 (XYZ) Fh Reserved Byte 4 identifies extended aspects of the payload identifier. 1An additional Color ANC packet to describe the FS characteristics is defined
40、 by SMPTE ST 2048-2. SMPTE ST 292-2:2011 Page 8 of 10 pages Bit b7 is reserved and shall be set to (0h) Bit b6 shall identify whether the stream carries the Left eye or Right eye images b6 = (0h) shall Identify a Left eye image b6 = (1h) shall identify a Right eye image Bits b4 and b5 shall be reser
41、ved and set to (0h) For the Left eye stream, bits b2 and b3 shall be reserved and set to (0h) For the Right eye stream, bits b2 and b3 shall signal the nature of any audio data carried in the Right eye stream. (0h) shall identify that no audio is present in the Right eye stream or that the status of
42、 any audio signals is unknown (1h) shall identify that the Right eye stream carries a copy of the Left eye stream audio (2h) shall identify that Right eye stream carries additional audio channels 17-32. When the audio sampling is 96 kHz these additional channels shall be channels 9-16.(3h) is reserv
43、ed Bits b1 and b0 shall identify the bit depth of the sample such that: (0h) reserved (1h) shall identify quantization using 10 bits per sample; (2h) and (3h) are reserved SMPTE ST 292-2:2011 Page 9 of 10 pages Annex A Bibliography (Informative) Note: All references in this document to other SMPTE d
44、ocuments use the current numbering style (e.g. SMPTE ST 12-1:2008) although, during a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 12M-1-2008). Documents with the same root number (e.g. 12-1) and publication year (e.g. 2008) are function
45、ally identical. SMPTE ST 12-1:2008, Television Time and Control Code SMPTE ST 274:2008, Television 1920 x 1080 Image Sample Structure, Digital Representation and Digital Timing Reference Sequences for Multiple Picture Rates SMPTE ST 296:2001, Television 1280 720 Progressive Image Sample Structure An
46、alog and Digital Representation and Analog Interface SMPTE ST 2048-1:2011, 2048 x 1080 and 4096 x 2160 Digital Cinematography Production Image Formats FS/709 SMPTE ST 2048-2:2011, 2048 x 1080 Digital Cinematography Production Image FS/709 Formatting for Serial Digital Interface SMPTE ST 292-2:2011 Page 10 of 10 pages Annex B SMPTE ST 292-2 Document Road Map (Informative) This road map shows the relations between SMPTE ST 292-2 and its normative reference documents.
