安全的汽车安全关键汽车图像信号处理器

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ARM已经为图像信号处理器(ISP)签署了Mobileye,专为驾驶员辅助和无人驾驶汽车提供安全关键汽车设计。Mali-C78AE可以与Cortex-A78AE CPU和Mali-G78AE GPU组合,用于安全关键的ADAS视觉管道Mobileye is first to license Mali-C78AE, in addition to…阅读更多
By Nick Flaherty

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ARM已经为图像信号处理器(ISP)签署了Mobileye,专为驾驶员辅助和无人驾驶汽车提供安全关键汽车设计。

Mali-C78AE可以与Cortex-A78AE CPU和Mali-G78AE GPU组合,用于安全关键的ADAS视觉管道

除马里-G78AE之外,Mobileye首先是授权Mali-C78AE的下一代Eyeq技术。该公司是英特尔的子公司和一个无人驾驶汽车系统的领先开发者,以前使用了MIPS处理器核心。

诸如碰撞避税,车道出发警告和自动紧急制动等ADAS应用,以及越来越依赖于围绕汽车定位的多个摄像机的车辆,以实现许多这些特征。

Mali-C78AE ISP核心专门设计用于解决人员和机器视觉安全应用,并且能够从最多四个实时或16个虚拟摄像机处理数据。安全功能允许其满足ASIL B / SIL 2,用于诊断要求和ASIL D / SIL 3用于避免系统故障

“我们知道安全在ADAS中是至关重要的,”ARM的汽车,汽车和物联网业务线VP的ChetBabla表示。“ADAS系统运营的故障或失败可能是危险的,威胁驾驶员,乘客和其他道路使用者的福祉。Mali-C78AE是从地上开发的硬件安全机制和诊断软件功能,使系统设计师能够满足ISO 26262 ASIL B功能安全要求。Mali-C78AE旨在防止或检测可能导致错误处理帧数据的单个相机帧中的故障。为此,ISP功能超过380个故障检测电路,连续内置自检,可以检测连接摄像机的传感器和硬件故障。“

The ISP core is designed for the requirement that should take 150 milliseconds to acquire an image at the sensor, process it through the ISP then GPU, and display it on a screen for the driver; anything longer is noticeable to the driver when using parking assist, for example. In a machine vision application, a vehicle should not travel more than 250mm between a camera image being acquired and it being presented to the decision-making processing and anything longer means the machine vision system is too slow to react in driving situations where accurate and timely decisions are critical.

Mali-C78AE还采用高级降噪技术和动态范围管理,以确保通过调整帧的过度暗或明亮的区域来确保每个帧清晰且正确地暴露。它可以从最多四个高分辨率高帧速率相机进行相机数据的实时处理,显着降低存储器,通信和处理要求,使得更有效的系统。

This can also reduce the cost of implementing multiple ADAS functions, says Babla. The Mali-C78AE enables camera sensors to be dual-purpose by downscaling and colour-translating the outputs of sensors optimized for machine vision to create images adapted to the human eye. By avoiding duplication in cameras and their associated electronics and wiring, developers save on cost and complexity.

“强大的愿景管道对推动大众市场ADAS部署的下一阶段越来越重要,”巴布拉说。“车辆是最复杂的电子设备的设备之一消费者会购买,它具有若干约束,汽车行业必须坚持,以便继续提高驾驶员安全和用户体验。”

www.arm.com.

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