1、 Table of Contents Foreword . 2 Introduction . 2 1 Scope 3 2 Conformance Notation 3 3 Normative References 3 4 Signal Levels and Specifications 4 5 Connector and Cable Types . 5 6 Channel Coding 5 7 Transmission Order. 6 8 Component 4:2:2 Signals 6 9 Levels of Operation. 6 Annex A Composite NTSC 4fs
2、cSignals 7 Annex B Composite PAL 4fscSignals . 9 Annex C Generator Polynomial Implementations. 12 Annex D Timing Jitter Specification 13 Annex E Waveform Measurement Method. 14 Annex F Optional Ancillary Data 4fscPAL. 15 Annex G 259M Road Map. 16 Annex H Bibliography 17 Revision Notes 18 1SDTV Stand
3、ard Definition Television Page 1 of 18 pages SMPTE 259M-2008Revision of SMPTE 259M-2006 SMPTE STANDARD for Television SDTV1Digital Signal/Data Serial Digital Interface Copyright 2008 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Appr
4、oved January 29, 2008 SMPTE 259M-2008 Page 2 of 18 pages Foreword SMPTE (the Society of Motion Picture and Television Engineers) is an internationally recognized standard developing organization. Headquartered and incorporated in the United States of America, SMPTE has members in over 80 countries o
5、n 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 standards
6、-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 Standard 259M was prepared by Technology Committee N26. Introduction This version of SMPTE 259M reflects the industry
7、usage that has evolved over the past years. The original intent of SMPTE 259M was to provide a serial digital connection between equipment replacing the parallel interface. At that time, uncompressed digital video was considered to be the only payload. This standard has evolved to also carry formatt
8、ed data within the defined payload areas. Formatting of the data, and the types of data to be carried are defined by other SMPTE standards (see Annex G for a document road map). Annex F includes a reference to SMPTE 291M; this reference is made, as the IEC reference part of Annex B does not include
9、a definition of ancillary data structure. SMPTE 259M-2008 Page 3 of 18 pages 1 Scope This standard describes a 10-bit serial digital interface operating at 143/270/360 Mb/s. The serial interface may carry uncompressed SDTV signals, or data. This standard has application in the television studio over
10、 lengths of coaxial cable where the signal loss does not exceed an amount specified by the receiver manufacturer. Typical loss amounts may be in the range of 20 dB to 30 dB at one-half clock frequency with appropriate receiver equalization. Receivers designed to work with lesser signal attenuation a
11、re acceptable, but are not recommend for new designs. 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 use
12、r, 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, normative, except: the Introduction, any section explicitly labeled as “Informative“ o
13、r 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 keywords, “should“ and “should not“ indicate that, among several possibilities, one is
14、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 course of action is deprecated but not prohibited. The keywords “may“ and “need not“ ind
15、icate 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 “forbidden” indicates “reserved” and in addition indicates that the provision will ne
16、ver 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“) as described. A conformant implementation need not implement optional provisions (“may“) and need no
17、t implement them as described. 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 valid. All standards are subject to revision, and parties to agreeme
18、nts based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE 125M-1995, Television Component Video Signal 4:2:2 Bit-Parallel Digital Interface SMPTE 244M-2003, Television System M/NTSC Composite Video Signals Bit
19、-Parallel Digital Interface SMPTE 267M-1995, Television Bit-Parallel Digital Interface Component Video Signal 4:2:2 16x 9 Aspect Ratio SMPTE RP 184-2004, Specification of Jitter in Bit-Serial Digital Systems SMPTE 259M-2008 Page 4 of 18 pages IEC 61169-8 (2007-02)2, Radio Frequency Connectors, Part
20、8: Sectional Specification R.F. Coaxial Connectors with Inner Diameter of Outer Conductor 6,5 mm (0,256 in) with Bayonet Lock Characteristics Impedance 50 Ohm (Type BNC), Annex A (Normative) Information for Interface Dimensions of 75 Ohm Characteristic Impedance Connector with Unspecified Reflection
21、 Factor 4 Signal Levels and Specifications The specifications in this clause are defined for measurement of the serial output of a source, “a generator”, derived from a parallel domain whose timing ensures the jitter specifications defined in 4.5. Specifications at the output of equipment located at
22、 other places in an all-serial digital chain are not addressed by this standard. Clock frequency refers to the serial clock and is equal to the bit rate for each television system. 4.1 The output of the generator shall be measured across a 75-ohm resistive load connected through a short coaxial cabl
23、e (approximately 1 meter). Figure 1 depicts the measurement dimensions for amplitude, risetime, and overshoot (see Annex E for the preferred measurement method for these parameters). Figure 1 Waveform measurement dimensions 4.1.1 The generator shall have an unbalanced output circuit with a source im
24、pedance of 75 ohm and a return loss of at least 15 dB over a frequency range from 5 MHz to the clock frequency of the signal being transmitted. 4.1.2 The peak-to-peak signal amplitude shall be 800 mV 10%. 4.2 The DC offset, as defined by the mid-amplitude point of the signal, shall be nominally 0.0
25、V 0.5 V. 4.3 The rise and fall times, determined between the 20% and 80% amplitude points, shall be no less than 0.4 ns, no greater than 1.50 ns, and shall not differ by more than 0.5 ns. 4.4 Overshoot of the rising and falling edges of the waveform shall not exceed 10% of the amplitude. 2Please not
26、e that the title of this normative reference may be misleading. This standard requires the use of the 75-ohm connector defined in this reference. SMPTE 259M-2008 Page 5 of 18 pages 4.5 The jitter in the timing of the transitions of the data signal shall be measured in accordance with SMPTE RP 184. M
27、easurement parameters are defined in SMPTE RP 184 and shall have the following values for compliance with this standard: Timing jitter lower band edge 10 Hz f1 Alignment jitter lower band edge 1 kHz f3 Upper band edge 1/10 clock rate f4 Timing jitter (note 1) 0.2 UI p-p A1 Alignment jitter (UI = uni
28、t interval) 0.2 UI p-p A2 Color bar test signal such as 525 Lines 75/7.5/75/7.5 ITU-R BT 471-1 or similar (note 2) 625 Lines 100/0/75/0 Serial clock divider (note 3) 10 n NOTES 1 Designers are cautioned that the clock in parallel signals conforming to interconnection standards, such as SMPTE 125M, m
29、ay contain jitter up to 6 ns p-p. Deriving the serial signal directly from the unfiltered parallel clock could result in excessive serial signal jitter (see Annex D for further information on timing jitter). 2 Color bars are chosen as a non-stressing test signal for jitter measurements. Use of a str
30、essing signal with long runs of zeros may give misleading results 3 Use of a serial clock divider value of 10 is acceptable; however, it may mask word-correlated jitter components. The divider value should be stated in conjunction with jitter specifications. 4.6 The input to the serial receiver sign
31、al shall present an impedance of 75 ohm with a return loss of at least 15 dB over a frequency range from 5 MHz to the clock frequency of the signal being transmitted. 5 Connector and Cable Types 5.1 The male and female connectors shall be 75-ohm BNC as defined in IEC 61169-8, Part 8, Annex A. 5.2 Ap
32、plication of this standard does not require a particular type of coaxial cable. It is necessary for the frequency response of the coaxial cable loss, in decibels, to be approximately proportional to 1/f from 1 MHz to the clock frequency of the signal being transmitted to ensure correct operation of
33、automatic cable equalizers over moderate to maximum lengths. 6 Channel Coding 6.1 The channel coding shall be scrambled NRZI. 6.2 The generator polynomial for the scrambled NRZ shall be G1(X) = X9+ X4+1. The polarity-free scrambled NRZI sequence shall be produced by G2(X) = X + 1. The input signal t
34、o the scrambler shall be positive logic (the highest voltage represents data 1 and the lowest voltage data 0) see Annex C. 6.3 Data word length shall be 10 bits. NOTE Because some legacy parallel interfaces may carry only 8 bits of data, values in the range 3FChto 3FFhmust be treated as equivalent t
35、o 3FFhfor the purpose of detecting ancillary data flags or other identifying flags using those values. SMPTE 259M-2008 Page 6 of 18 pages 7 Transmission Order The LSB of each data word shall be transmitted first. 8 Component 4:2:2 Signals 8.1 The input source for generating a serial 4:2:2 video data
36、 stream shall be as defined by SMPTE 125M and SMPTE 267M. Ancillary data, if present, shall be passed by the serial interface transparently. NOTE Ancillary data may be added to the serial bit stream by external devices. 8.1.1 Because some parallel component digital interfaces may carry only 8 bits o
37、f video data, it is necessary for the data serializer to identify this condition and to add the necessary data to convert the 8-bit signal to a 10-bit representation. The EAV and SAV of the 8-bit signals should be converted in the following manner: 8 bit 10 bit FF 3FF 00 000 00 000 PQ XYZ (= PQ data
38、 left shifted twice with subordinate bits set to zero) 8.2 The bit rate for the resulting serial data stream shall be nominally 270 Mb/s for 13.5-MHz luma sampling and 360 Mb/s for 18-MHz luma sampling 9 Levels of Operation (Informative) To define the level of support for this standard, manufacturer
39、s are encouraged to indicate in commercial publications, bit rate (s) supported: Level A 143 Mb/s, Level B 177 Mb/s, Level C 270 Mb/s, Level D 360 Mb/s, Examples of compliance nomenclature: A SMPTE D-2 VTR accepting only composite digital NTSC would be said to conform to SMPTE 259M-A. A multi-standa
40、rd routing switcher with a maximum bit rate of 270 Mb/s would be said to conform to SMPTE 259M-ABC. SMPTE 259M-2008 Page 7 of 18 pages Annex A (Normative) Composite NTSC 4fsc Signals Although it is not anticipated that use of this annex will expand greatly, there continues to be many implementations
41、 still in use, as such, this is a normative annex. A.1 Input source The input source for generating a serial 4fsccomposite video data stream shall conform to SMPTE 244M. Ancillary data may be part of the SMPTE 244M interface, or may be added by external devices. A1.1 Because some SMPTE 244M interfac
42、es may only carry 8 bits of video data, it is necessary for the data serializer to identify this condition and to add the necessary data to convert the 8-bit signal to a 10-bit representation. A.2 Bit rate The bit rate for the resulting data stream shall be nominally 143 Mb/s. A.3 Signal processing
43、Signal processing of the input signal is necessary to provide timing and synchronizing information in the serial digital domain. This information is designated TRS-ID, timing reference signal and line number identification. A.3.1 The TRS and line number ID shall be present only following the sync le
44、ading edge that identifies a horizontal rate transition (see Figures A.1 and A.2). A.3.2 The TRS signal shall consist of four words located at word number addresses 790, 791, 792, 793. Corresponding word values are 3FF, 000, 000, 000. A.3.3 Line number ID shall be one word. The line number word-numb
45、er address shall be 794 with the following values: b2 b1 b0 0 0 0 Line 1 263 Field 1 0 0 1 Line 264 525 Field 2 0 1 0 Line 1 263 Field 3 0 1 1 Line 264 525 Field 4 b7 b6 b5 b4 b3 (MSB) (LSB) The possible values of X1 are restricted by the use of bits b7-b3 and indicate the following: X1 = 0 Not used
46、. 1 X1 30 X1 indicates the line number of each field (lines 1 - 30 in odd fields, lines 264 - 293 in even fields). X1 = 31 To indicate line number 31 and up of each odd field and line number 294 and up on each even field. X1 = 16 (b7) + 8 (b6) + 4 (b5) + 2 (b4) + 1 (b3). b8 is even parity for b7 thr
47、ough b0 b9 = b8 SMPTE 259M-2008 Page 8 of 18 pages Figure A.1 NTSC horizontal sync details Figure A.2 NTSC vertical sync details Figure A.3 NTSC equalizing pulse details SMPTE 259M-2008 Page 9 of 18 pages Annex B (Informative) Composite PAL 4fscSignals Details of 4fsccomposite PAL data formatting is
48、 provided for systems designers. It is not expected that further use of this mapping will be implemented. Some legacy installations may still be in service. B.1 Input source The input source for generating a serial 4fsccomposite video data stream shall conform to IEC 61179. Ancillary data may part o
49、f the IEC 61179 interface, or may be added by external devices (see informative Annex F) B.1.1 Because some IEC 61179 interfaces may carry only 8 bits of video data, it is necessary for the data serializer to identify this condition and to add the necessary data to convert the 8-bit signal to a 10-bit representation. B.2 Bit rate The bit rate for the resulting serial data stream shall be nominally 177.3 Mb/s. B.3 Signal processing Signal processing of the input signa
