ARINC-818协议详解与2013更新介绍
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收藏 676KB PDF 举报 ARINC 818 Implementer's Guide是一份关于航空电子数字视频总线（Avionics Digital Video Bus, ADVB）的专业指南，旨在为开发者提供对ARINC 818标准的简明介绍以及其2013年更新的重要细节。ARINC 818是一种广泛应用于航空电子系统中的高速数据传输标准，用于飞机内部和外部设备之间的通信，特别是视频和图像数据的传输。
该文档发布于2006年12月30日，随着航空技术的发展和标准的演变，于2014年2月20日进行了全面更新。此次更新增加了对ARINC 818-2新功能的概括性描述，扩充了相关硬件的列表，并改进了图表和排版，以确保信息的准确性和易读性。在3.7.5节中，特别修正了对Class C2类别的强调，并对讨论内容进行了相应调整。
文档强调，尽管提供了信息性的价值，但用户必须结合行业标准文档使用，因为Great River Technology不承担因使用本指南而在设计或开发电子设备或系统过程中产生的法律责任。用户在使用时需自行确认其内容的最新性和适用性。
主要内容包括：
1. **概述**
- 介绍了指南的目的，即帮助开发者理解和实施ARINC 818标准，以便高效地集成到飞机系统中。
- 指出该指南在指导设计、实现和维护兼容ARINC 818的硬件和软件方面的角色。
1. **目的**
- 提供对ARINC 818标准的详细介绍，帮助工程师理解和遵循规范，确保系统间的无缝通信和性能优化。
1. **标准更新**
- 描述了2013年的关键变更，可能涉及数据传输速率、新功能特性、接口规范等，这些变化可能影响到设备的设计和实现。
1. **硬件支持**
- 提供了与ARINC 818兼容的硬件清单，帮助开发者选择或设计符合标准的设备，如视频编码器、解码器、接口卡等。
1. **技术细节**
- 包括协议的工作原理、数据帧结构、错误检测和纠正机制，以及其他重要技术参数，为开发者提供实现ADVB的具体指导。
2. **注意事项**
- 法律责任声明，提醒用户在使用指南时需自行判断，且可能存在潜在风险，需要结合其他官方文档进行验证。
ARINC 818 Implementer's Guide是开发人员在设计和实现航空电子系统时的重要参考文献，它详细阐述了如何遵循ARINC 818标准来构建安全、可靠和高效的视频传输系统。通过理解并遵循文档中的内容，工程师可以确保他们的产品能够满足航空行业的严格要求。
ARINC 818 Implementer’s Guide
Great River Technology
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ARINC 818 was ratified in October 2006 by the Airlines Electronic Engineering Committee
(AEEC) and generated enthusiastic industry support. Since then, ARINC 818 has been
used as the video transport protocol for cockpit displays on the Boeing 787 and the KC-
46A tanker; Airbus A350 and A400M; the COMAC C-919; the C-17, F15, F18 upgrade
programs; and numerous other commercial and military aircraft, becoming the de facto
military standard worldwide as well as the commercial standard. It has contributed to
systems such as infrared and wavelength sensors, optical cameras, radar, flight recorders,
map/chart systems, which in turn contributed to taxi and take-off assist, cargo loading,
navigation, target tracking, collision avoidance, and other critical functions.
Since 2006, as programs advanced, new requirements and applications for the ARINC
818 protocol arose. Link rates of 14.025, and 28.05 Gb/s have been released with even
higher speeds planned as the market needs it. For example, a display at WQXGA
resolution (2560 x 1600 pixels) with 24-bit RGB at 60 hertz would need a bandwidth of
7.372 Gb/s (Figure 1.3).
Meanwhile, custom applications of ARINC 818 led to work in areas that the original
specification omitted—for example, video compression and encryption, switching, and bi-
directional synchronization. This work also led to a standard means for computing prior-
image cyclical redundancy checks (CRC).
Early in 2013, ARINC approved a project to advance the protocol. Representatives from
Airbus, Boeing, COTSWORKS, Elbit, Thales, Honeywell, DDC, SRB Consulting, and
Great River Technology proposed, discussed, and drafted the items for the supplement,
completing the work that August. On October 31, 2013, the AEEC Executive Committee
unanimously approved the ARINC 818-2 draft, and ARINC released ARINC 818-2 on
December 18, 2013.
1.4 The first things to know about ARINC 818
ARINC 818 is a simplification of FC-AV. Because ARINC 818 began as a unidirectional
point-to-point video link, many of the complexities associated with FC-AV and Fibre
Channel lower layers are greatly simplified. For instance, there is no link initialization, no
fabric login, no flow control, and no exchanges—all of which require a bi-directional link.
Because of this, much of the FC-2 layer and some of the FC-1 layer (the bulk of the FC-
PH document) are not used. This is good news for designers because meeting these
requirements would require that designs always have a micro-processor and software to
manage the exchanges. ARINC 818 can be implemented in a PLD or FPGA. Because it
is a simplification, the learning curve for designers is reduced. Under the ARINC 818-2, bi-
directional communication is possible—for example, to provide a return path for sensor
control. However, it is achieved by an independent ARINC 818 path, not by reverting to
the complexities of FC-AV. No handshaking has been added, but if needed, this could be
defined in an interface control document for a particular project.
Each ARINC 818 project uses an associated interface control document (ICD) to
achieve flexibility and interoperability. ARINC 818 allows for flexibility in the
implementation of the video interface. This flexibility is desirable because of the diverse
resolutions, grayscales, pixel formats, and frame rates of avionics display systems.
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