1、 Copyright 2012 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved January 3, 2012 Table of Contents Page Foreword . 2 Intellectual Property 2 Introduction 2 1 Scope . 32 Conformance Notation . 33 Normative References . 34 Source
2、 Format Data . 45 Interface Data Format 56 Serial Data Format . 67 Channel Coding . 78 Coaxial Cable Interface 79 Payload Identifier . 9Annex A Channel Code (Informative) 13Annex B Bibliography (Informative) . 14Annex C Document Road Map (Informative) . 15Annex D Timing Reference Codes (Informative)
3、 . 16Annex E Source Signal Formats (Informative) . 17Annex F Audio Data Mapping (Informative) . 19 Revision Notes 20 Page 1 of 21 pages SMPTE ST 292-1:2012 Revision of SMPTE ST 292-1:2011 SMPTE STANDARD 1.5 Gb/s Signal/Data Serial Interface SMPTE ST 292-1:2012 Page 2 of 20 pages Foreword SMPTE (the
4、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 Engineering Documents, including Standards, Recomme
5、nded 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 organizations, including ISO, IEC and ITU. SMPTE Engineering Doc
6、uments are drafted in accordance with the rules given in Part XIII of its Administrative practices. SMPTE ST 292-1 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 o
7、f 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 shall not be held responsible for identifying any or all such patent rights. Introduction This section is entirely informative and does not form an in
8、tegral part of this Engineering Document. This standard has been developed to carry HDTV digital video signals and formatted data within the defined payload areas including ancillary data. The standard can carry 1280720, 19201080 or 20481080 active pixel formats through the 1.5 Gb/s Serial Digital I
9、nterface and enables the carriage of any ancillary data conforming to SMPTE ST 291. SMPTE ST 292-1:2012 Page 3 of 20 pages 1 Scope This standard defines a bit-serial data structure and the coaxial cable interface specifications for 1.5 Gb/s nominal Signal/Data Serial Interface to carry either 128072
10、0, 19201080 or 20481080 active pixel formats mapped into the 1.5 Gb/s payload. This standard defines the method of serializing the parallel source format data to a serial bit stream. This interface may also carry packetized data mapped into the 1.5 Gb/s transport payload providing the constraints im
11、posed by the reference source image formats are observed. This standard specifies a coaxial cable interface suitable for application where the signal loss does not exceed an amount specified by the receiver manufacturer, typical loss amounts would be in the range of up to 20 dB at one-half the clock
12、 frequency. 2 Conformance Notation Normative text is text that describes 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 remov
13、ed, changed, or added editorially without affecting interoperability. 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 “N
14、ote:” 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 keywords, “should“ and “should not“ indicate that, among several possibilities, one is recommended as particularly suitable, with
15、out 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 course of action is deprecated but not prohibited. The keywords “may“ and “need not“ indicate courses of action permissible within
16、 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 “forbidden” indicates “reserved” and in addition indicates that the provision will never be defined in the future. 3 Normative
17、References 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 same root n
18、umber (e.g. 274) and publication year (e.g. 2008) are functionally identical. 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 valid. All standards are subject to revision
19、, 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 274:2008, Television 1920 x 1080 Image Sample Structure, Digital Representation and Digital Timing Reference Sequences for M
20、ultiple Picture Rates SMPTE ST 296:2011, 1280 x 720 Progressive Image Sample Structure Analog and Digital Representation and Analog Interface SMPTE ST 352:2011, Payload Identification Codes for Serial Digital Interfaces SMPTE ST 292-1:2012 Page 4 of 20 pages SMPTE ST 2048-2:2011, 2048 x 1080 Digital
21、 Cinematography Production Image FS/709 Formatting for Serial Digital Interface SMPTE RP 184:2004, Specification of Jitter in Bit-Serial Digital Systems IEC 61169-8 (2007-2), Part 8: Sectional Specification R.F. Coaxial Connectors with Inner Diameter of Outer Conductor 6,5 mm (0,256 in) with Bayonet
22、 Lock Characteristic Impedance 50 (Type BNC), Annex A (Normative) Information for Interface Dimensions of 75 Characteristic Impedance Connector with Unspecified Reflection Factor14 Source Format Data 4.1 For this interface, the source data shall be 10-bit words. The source data may be an uncompresse
23、d video source or packetized data constrained by the pixel array of the referenced source image formats. 4.2 For uncompressed 4:2:2 HDTV or 20481080 pixel signals, the interface shall be two parallel bit streams. One stream shall be defined as the Luma (Y) data channel, and the second stream shall b
24、e the Color-Difference (CB,CR) data channel. These data channels shall be multiplexed to form the serial data stream. The multiplexing shall be as defined in Figure 3. Other mappings shall be defined by application documents. 4.3Data for each line of the interface shall be divided into four areas: S
25、AV (start of active video) timing reference, digital active line, EAV (end of active video) timing reference, LN (Line number), CRC (Cyclic Redundancy Check Code), and digital line blanking as shown in Figure 1. The number of words and defined data in each area shall be specified by the source forma
26、t or mapping documents. 4.4 Parameters for uncompressed HDTV and 20481080 pixel sources and associated ancillary space shall be defined by: SMPTE ST 274 SMPTE ST 296 SMPTE ST 2048-2 (See informative Annex E.) The total data rate shall be either 1.485 Gb/s or 1.485/1.001 Gb/s. The source format or ma
27、pping documents determine the precise interface clock frequency2. Figure 1 Interface horizontal line data 1Please note that the title of this normative reference could be misleading. This standard requires the use of the 75-ohm connector defined in this reference. 2Designers are encouraged to refer
28、to multi-link 1.5 Gb/s-SDI or higher data rate SDI documents for the image formats which require higher than 1.485 Gb/s or 1.485/1.001 Gb/s. SMPTE ST 292-1:2012 Page 5 of 20 pages 5 Interface Data Format 5.1 Digital active line and digital line blanking shall consist of 10-bit words as defined by th
29、e source format document. Data values 000h to 003h and 3FCh to 3FFh shall be used exclusively for synchronization purposes.35.2Timing references SAV, EAV, line number, and CRCs for each of the two parallel data streams shall be formatted as shown in Figure 2. Figure 2 Timing reference format (Luma c
30、hannel shown) 5.3Interface line number data shall be composed of two words and shall be as shown in Table 1. 5.4CRC (cyclic redundancy check codes) shall be used to detect errors in the active digital line, including EAV and LN. The error detection code shall consist of two words determined by the p
31、olynomial generator equation: CRC(X) = X18 + X5 + X4 + 1 The initial value of the CRC shall be set to zero. The calculation shall start at the first active line word and shall end at the final word of the line number data, LN1. Two CRCs shall be calculated, one for the luma data channel and one for
32、the color-difference data channel of the interface, as shown in Table 2. Luma channel and color-difference channel of the interface may carry packetized data as defined by other application documents providing the constraints defined in this standard and that of the source image formats are observed
33、. 5.5Available ancillary data space shall be defined by the source format. Attention is drawn to the reduced sample number of H-Blank by 2048 1920 = 128 when transporting 20481080 active image formats. (See informative Annex F.) 3SMPTE ST 291 Ancillary data packets use these values for identificatio
34、n. SMPTE ST 292-1:2012 Page 6 of 20 pages Table 1 Line number data Word 9 (MSB) 8 7 6 5 4 3 2 1 0 (LSB) LN0 B8 L6 L5 L4 L3 L2 L1 L0 R R LN1 B8 R R R L10 L9 L8 L7 R R NOTES 1 L0 L10 = line number in binary code. 2 R = reserved, set to “0”. Table 2 CRC data Word 9 (MSB) 8 7 6 5 4 3 2 1 0 (LSB) YCR0 B8
35、 CRC8 CRC7 CRC6 CRC5 CRC4 CRC3 CRC2 CRC1 CRC0 YCR1 B8 CRC17 CRC16 CRC15 CRC14 CRC13 CRC12 CRC11 CRC10 CRC9 CCR0 B8 CRC8 CRC7 CRC6 CRC5 CRC4 CRC3 CRC2 CRC1 CRC0 CCR1 B8 CRC17 CRC16 CRC15 CRC14 CRC13 CRC12 CRC11 CRC10 CRC9 6 Serial Data Format 6.1 The two source format parallel data streams with EAV a
36、nd SAV shall be as shown in Figure 2 and shall be interleaved as shown in Figure 3. 6.2 Interleaved data shall be serialized with the LSB (least significant bit) of each data word transmitted first. Figure 33FF (C)3FF (Y)3FF (C)3FF (Y)000 (C)000 (Y)000 (C)000 (Y)000 (C)000 (Y)000 (C)000 (Y)XYZ (C)XY
37、Z (Y)LN0 (C)LN0 (Y)LN1 (C)LN1 (Y)CCR0YCR0CCR1YCR1CBdataYdataCRdataYdataXYZ (C)XYZ (Y)CBdataYdataCRdataYdataEAV LN CRC SAVData DataFigure 3 Interleaved data stream SMPTE ST 292-1:2012 Page 7 of 20 pages 7 Channel Coding 7.1 The channel coding scheme shall be scrambled NRZI (non-return to zero inverte
38、d). (See Annex A.) 7.2 The generator polynomial for the scrambled NRZ shall be G1(X) = X9 + X4 + 1. Polarity-free scrambled NRZI sequence data shall be produced by the generator polynomial G2(X) = X + 1. The input signal to the scrambler shall be positive logic. (The highest voltage represents data
39、1 and the lowest voltage represents data 0.) 7.3 The serial interface data word length shall be 10 bits. 8 Coaxial Cable Interface 8.1Signal Levels and Specifications These specifications shall be defined for measurement of the serial output of a source derived from a parallel domain signal. 8.1.1 T
40、he output of the generator shall be measured across a 75-ohm resistive load connected through a 1-m coaxial cable. Figure 4 defines the measurement dimensions for amplitude, rise-time and overshoot. Figure 4 Waveform measurement dimensions 8.1.2 The generator shall have an unbalanced output circuit
41、with a source impedance of 75 ohms and a return loss of at least 15 dB over a frequency range of 5 MHz to the clock frequency of the signal being transmitted. 8.1.3 The peak-to-peak signal amplitude shall be 800 mV 10% measured as specified in 8.1.1. 8.1.4 The dc offset, as defined by the mid-amplit
42、ude point of the signal, shall be nominally 0.0 V 0.5 V. 8.1.5 The rise and fall times, determined between the 20% and 80% amplitude points shall be no greater than 270 ps and shall not differ by more than 100 ps. 8.1.6 Overshoot of the rising and falling edges of the waveform shall not exceed 10% o
43、f the amplitude. SMPTE ST 292-1:2012 Page 8 of 20 pages 8.1.7 Output amplitude excursions due to signals with a significant dc component occurring for a horizontal line (pathological signals) shall not exceed 50 mV above or below the average peak-to-peak signal envelope. Note: This specification def
44、ines a minimum output coupling time constant. 8.1.8 The jitter in the timing of the transitions of the data signal shall be measured in accordance with SMPTE RP 184. Measurement parameters shall be as defined in SMPTE RP 184 and shall have the values shown in Table 3 for compliance with this standar
45、d. 8.1.9 The receiver of the serial interface signal shall present an impedance of 75 ohms with a return loss of at least 15 dB over a frequency range of 5 MHz to the clock frequency of the signal being transmitted. 8.1.10 Receivers operating with input cable losses in the range of up to 20 dB at on
46、e-half the clock frequency are nominal; however, receivers designed to work with greater or lesser signal attenuation are acceptable. 8.1.11 When connected to a line driver operating at the lower limit of voltage permitted by 8.1.3, the receiver should sense correctly the binary data in the presence
47、 of the superimposed interfering signal at the following levels: dc 2.5V Below 5 kHz 1/10 the clock rate Upper band edge A1 1 UI Timing jitter (Note 1) A2 0.2 UI Alignment jitter (UI = unit interval) Test signal Color bar test signal (Note 2) n 10 (preferred) Serial clock divided (Note 3) Notes: 1 D
48、esigners are cautioned that parallel signals could contain jitter up to 2 ns p-p. Direct conversion of such signals from parallel to serial could result in excessive serial signal jitter. 2 Color bars are chosen as a nonstressing test signal for jitter measurements. Use of a stressing signal with lo
49、ng runs of zeros could give misleading results. 3 Use of a serial clock divider value of 10 could mask word correlated jitter components. 4 See SMPTE RP 184 for definition of terms. 8.2 Connector and Cable Types 8.2.1 The male and female connectors shall be 75-ohm BNC as defined in IEC 61169-8, Part 8, Annex A. 8.2.2 Application of this standard do
