1、 AN DOCUMENT Prepared by AIRLINES ELECTRONIC ENGINEERING COMMITTEE Published by AERONAUTICAL RADIO, INC. 2551 RIVA ROAD, ANNAPOLIS, MARYLAND 21401-7435 AVIONICS DIGITAL VIDEO BUS LOW DATA RATE - UNCOMPRESSED ARINC SPECIFICATION TYPE NUMBER PUBLISHED: June 1, 2006 DISCLAIMER THIS DOCUMENT IS BASED ON
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8、IMER. 2006 BY AERONAUTICAL RADIO, INC. 2551 RIVA ROAD ANNAPOLIS, MARYLAND 21401-7435 USA Prepared by the Airlines Electronic Engineering Committee Specification 817 Adopted by the Airlines Electronic Engineering Committee April 4, 2006 ARINC SPECIFICATION 817 AVIONICS DIGITAL VIDEO BUS LOW-DATA - UN
9、COMPRESSED Published: June 1, 2006ii FOREWORD Aeronautical Radio, Inc., the AEEC, and ARINC Standards Aeronautical Radio, Inc. (ARINC) was incorporated in 1929 by four fledgling airlines in the United States as a privately-owned company dedicated to serving the communications needs of the air transp
10、ort industry. Today, the major U.S. airlines remain the Companys principal shareholders. Other shareholders include a number of non-U.S. airlines and other aircraft operators. ARINC sponsors aviation industry committees and participates in related industry activities that benefit aviation at large b
11、y providing technical leadership and guidance and frequency management. These activities directly support airline goals: promote safety, efficiency, regularity, and cost-effectiveness in aircraft operations. The Airlines Electronic Engineering Committee (AEEC) is an international body of airline tec
12、hnical professionals that leads the development of technical standards for airborne electronic equipment-including avionics and in-flight entertainment equipment-used in commercial, military, and business aviation. The AEEC establishes consensus-based, voluntary form, fit, function, and interface st
13、andards that are published by ARINC and are known as ARINC Standards. The use of ARINC Standards results in substantial benefits to airlines by allowing avionics interchangeability and commonality and reducing avionics cost by promoting competition. There are three classes of ARINC Standards: a) ARI
14、NC Characteristics Define the form, fit, function, and interfaces of avionics and other airline electronic equipment. ARINC Characteristics indicate to prospective manufacturers of airline electronic equipment the considered and coordinated opinion of the airline technical community concerning the r
15、equisites of new equipment including standardized physical and electrical characteristics to foster interchangeability and competition. b) ARINC Specifications Are principally used to define either the physical packaging or mounting of avionics equipment, data communication standards, or a high-leve
16、l computer language. c) ARINC Reports Provide guidelines or general information found by the airlines to be good practices, often related to avionics maintenance and support. The release of an ARINC Standard does not obligate any airline or ARINC to purchase equipment so described, nor does it estab
17、lish or indicate recognition or the existence of an operational requirement for such equipment, nor does it constitute endorsement of any manufacturers product designed or built to meet the ARINC Standard. In order to facilitate the continuous product improvement of this ARINC Standard, two items ar
18、e included in the back of this volume: An Errata Report solicits any corrections to the text or diagrams in this ARINC Standard. An ARINC IA Project Initiation/Modification (APIM) form solicits any recommendations for addition of substantive material to this volume which would be the subject of a ne
19、w Supplement. ARINC SPECIFICATION 817 TABLE OF CONTENTS iii 1.0 INTRODUCTION .1 1.1 Scope 1 1.2 Benefit .1 1.3 References 1 1.4 RTCA and EUROCAE Documents 2 1.5 Regulatory Approval 2 2.0 INTEROPERABILITY 3 2.1 Coaxial Media 3 2.1.1 Measurement Methods3 2.1.2 Return Loss.3 2.1.3 Signal Amplitude .3 2
20、.1.4 DC Offset 3 2.1.5 Rise and Fall Times 3 2.1.6 Overshoot .3 2.1.7 Jitter4 2.1.8 Input Impedance .4 2.1.9 Receiver Sensitivity.4 2.1.10 Contacts5 2.2 Fiber Optic Media 5 2.2.1 Fiber Size5 2.2.2 Wavelength.5 2.2.3 Electrical-Optical Transfer Function 5 2.2.4 Contacts5 2.3 Channel Coding .5 2.3.1 V
21、ideo Encoding Format.5 2.3.2 Data Integrity.5 2.3.3 Word Length .5 2.3.4 Signal Transmission Order5 3.0 SOURCE SIGNAL FORMAT .6 3.1 Video Input Source 6 3.1.1 Frame Structure 6 3.1.2 Line Structure7 3.1.3 Serial Conversion8 3.2 Speed of Operation8 3.3 Ancillary Data.9 3.4 Timing Reference Symbols9 A
22、RINC SPECIFICATION 817 TABLE OF CONTENTS iv 3.5 Alternate Field Rates .11 Attachments 1 Polynomial Scrambler Examples12 2 60 HZ FIELD RATE ADAPTATION13 ARINC SPECIFICATION 817 Page 1 1.0 INTRODUCTION 1.0 Introduction This standard describes a digital video interface for use in all types of avionic e
23、quipment. This standard is an adaptation of SMPTE 259M, Serial Digital Interface, developed by the Society of Motion Picture and Television Engineers (SMPTE). 1.1 Scope This standard is intended for equipment operating over electrical or optical media at 270 Mbps (SMPTE 259M Level C).This standard d
24、escribes a serial digital interface for video transmitted in 525 lines at 59.94 Hz operating with either 8-bit or 10-bit, 4:2:2 component uncompressed color encoding. This interface preserves the orthogonal horizontal and vertical timing relationship of analog video, i.e., the frame, field, line, an
25、d pixel timing are synchronous with the serial clock. 1.2 Benefit This standard is expected to minimize avionics system cost and aircraft maintenance costs by providing a limited number of standard video interfaces adapted to avionics needs. It will improve equipment interoperability, maintainabilit
26、y, and the use of test equipment. 1.3 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. Those party to agreements b
27、ased on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ANSI/SMPTE 125M -1995, Television Component Video Signal 4:2:2 Bit-Parallel Digital Interface ANSI/SMPTE 259M -1997, Television 10-Bit 4:2:2 Component and 4Fsc Co
28、mposite Digital Signals Serial Digital Interface ANSI/SMPTE 291M -1996, Television Ancillary Data Packet and Space Formatting ANSI/SMPTE 297M -2000, Television Serial Digital Fiber Transmission System for ANSI/SMPTE 259M Signals ARINC Specification 600: Air Transport Avionics Equipment Interfaces AR
29、INC Specification 801: Fiber Optic Connectors ARINC Specification 802: Fiber Optic Cable ARINC Specification 803: Fiber Optic System Design Guidelines SMPTE RP 165 -1994, Error Detection Checkwords and Status Flags for Use in Bit-Serial Digital Interfaces for Television SMPTE RP 184 -1996, Specifica
30、tion of Jitter in Bit-Serial Digital Systems ARINC SPECIFICATION 817 Page 2 1.0 INTRODUCTION 1.4 RTCA and EUROCAE Documents RTCA and EUROCAE develop Minimum Operational Performance Standards (MOPS) that are applicable to avionics equipment, systems and processes. The latest revision of RTCA and EURO
31、CAE documents pertain to this standard, in particular: RTCA DO-160 / EUROCAE ED-14 - Environmental Conditions and Test Procedures for Airborne Equipment COMMENTARY Specific performance levels defined in RTCA/EUROCAE documents are specified by the aircraft systems integrator according to the specific
32、 application. 1.5 Regulatory Approval Implementation of this standard should meet all applicable regulatory requirements. Manufacturers are urged to obtain all necessary information for such regulatory approval. This information is not contained in this specification, nor is it available from ARINC.
33、 ARINC SPECIFICATION 817 - Page 3 2.0 INTEROPERABILITY STANDARDS 2.0 Interoperability Standards This section defines standard signaling formats that are intended to provide the highest level of interoperability possible of the video interface. Both coaxial and fiber optic media are specified herein.
34、 The physical layer definition, timing and measurement methods are specified for video interfaces designed in compliance with good avionics practices. In all installations, the environment should be examined to determine whether High Intensity Radiated Fields (HIRF) is a concern and if coaxial media
35、 is acceptable. 2.1 Coaxial Media Coaxial cable characteristics are as follows: Impedance: 75 ohms 5 ohms Capacitance per unit length: 1/10 clock rate B3 Timing jitter (Note 1) 0.2 UI p-p (UI=Unit Interval) A1 Alignment jitter 0.2 UI p-p A2 Color bar test signal (Note 2) EG 1 Serial clock divider (N
36、ote 3) 10 n Notes: 1. Designers are cautioned that the clock in parallel signals conforming to interconnection standards, such as ANSI/SMPTE 125M, may 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
37、(see annex B of SMPTE 259M for further information on timing jitter). 2. Color bars are chosen as a non-stressing test signal for jitter measurements. Use of a stressing signal with long runs of zeros may give misleading results. 3. Use of a serial clock divider value of 10 is acceptable. However, i
38、t may mask word-correlated jitter components. The divider value should be stated in conjunction with jitter specifications. 2.1.8 Input Impedance The receiver input impedance should be 75 ohms with a return loss of 15 dB minimum over a frequency range of 5 MHz to 270 MHz. 2.1.9 Receiver Sensitivity
39、Receiver sensitivity is not specified herein because of the probable use of cable equalization by the receiver. Thus, no other receiver characteristics are specified in this document. The user is expected to take into account the types of cable and possible lengths of cable with which the receiver w
40、ill operate. ARINC SPECIFICATION 817 - Page 5 2.0 INTEROPERABILITY STANDARDS 2.1.10 Contacts Coaxial contacts should be selected to meet the electrical signal requirements and the physical installation requirements. ARINC Specification 600 provides connector standards for blind-mate installations. 2
41、.2 Fiber Optic Media Fiber optic system design guidelines are provided in ARINC Specification 803. 2.2.1 Fiber Size The fiber size is 62.5 microns id (inside diameter) per ARINC Specification 802. 2.2.2 Wavelength The specified wavelength is 1310 nm. This is compatible with legacy systems using ANSI
42、/SMPTE 297M -2000, Television Serial Digital Fiber Transmission System for ANSI/SMPTE 259M Signals. 2.2.3 Electrical-Optical Transfer Function Electrical signals are converted to optical signals. Logic 1 is defined as maximum optical intensity. Logic 0 is defined as minimum optical intensity. 2.2.4
43、Contacts Fiber optic contacts are defined in ARINC Specification 801. 2.3 Channel Coding 2.3.1 Video Encoding Format The channel coding is defined to be scrambled NRZI (Non Return to Zero Invert). 2.3.2 Data Integrity The generator polynomial for the scrambled NRZ is G1(X) = X9+ X4+ 1. The polarity
44、free scrambled NRZI sequence is produced by G2(X) = X + 1. The input signal to the scrambler uses positive logic (the highest voltage represents logic 1 and the lowest voltage logic 0). Examples of the polynomial scrambler and descrambler are included in Attachment 1. 2.3.3 Word Length Data word len
45、gth is 10 bits. Because some parallel interfaces may carry only 8 bits of data, values in the range 3FCh to 3FFh shall be treated as equivalent to 3FFh for the purpose of detecting ancillary data flags or other identifying flags using those values. 2.3.4 Signal Transmission Order The LSB of any data
46、 word is transmitted first. PROJECT PAPER 817 - Page 6 3.0 SIGNAL SOURCE FORMAT 3.0 Source Signal Format This section describes the video frame structure and video line structure. 3.1 Video Input Source The input source for generating a serial 4:2:2 data stream is as defined in this section. 3.1.1 F
47、rame Structure Video frame structure is shown in Figure 3-1 below. Field 1 Vertical Blanking Field 2 Horizontal Blanking Field 1 Active video Field 2 Active video Frame Line 1 Line 525 Line 19 Line 20 Line 282 Line 283 Line 263 Line 264 Vertical Blanking Word1440Word1715Word1439Word0Line 4 Line 266
48、Line 265 Line 3 Each video frame is made of two fields: Field 1(odd field) and Field 2 (even filed) representing a total of 525 lines. Lines of a video frame are numbered 1 through 525. Field 1 contains lines 4 through 265 and contains the first active video line (line 20). Field 2 contains lines 1
49、through 3 and 266 through 525. Active video data is present on lines 20 through 263 and on lines 283 through 525. Video data will not be present on lines 1-19 and 264-282 (vertical blanking). The aspect ratio of the image (represented by the combination of the two fields of a video frame) shall be 4:3. PROJECT PAPER 817 - Page 7 3.0 SIGNAL SOURCE FORMAT 3.1.2 Line Structure As shown in Figure 3-2, transmitted during each active line are 1440 multiplexed luminance and chrominance values (720 luminance, 360 chrominance Cr, and 360 chrominance Cb values). Eight
