Abstract
AbstractCamera Monitor Systems (CMSs), for example, for backup cameras or mirror replacements, become increasingly important and already cover safety aspects such as guaranteed latency and no frame freeze. Today's approaches deal only with supervision of the digital interface, LCD backlight, and power supply. This paper introduces methods for advanced safety monitoring of panel electronics and optical display output that aim to enable future CMS based automotive use cases. Our methods are based on correlation of physical measurements with predicted values derived from a corresponding display model. This model was made via calibration measurements and many test patterns. Correlation of the monitoring results with predicted values corresponds to the probability that the RGB data are shown as intended. This implies that an overlying system, an Automotive Safety Integrity Level (ASIL) Prepared Video Safety System (APVSS), ensures that only safety verified RGB data are provided to the panel electronics. In case of failures, our methods enable a safe system state, for example, by deactivating the panel. An additional challenge is to allow graceful degradations, a safe but slightly degraded image may provide a better customer experience compared with no information. We successfully verified our approach by a fully functional prototype and extensive evaluation towards “light‐to‐light” (camera to display output) supervision.
Highlights
Safety is essential for vehicles: In modern cars, more and more Camera Monitor Systems (CMSs) are integrated, for example, a backup camera is required by law in the United States.[1]
This implies that an overlying system, an Automotive Safety Integrity Level (ASIL) Prepared Video Safety System (APVSS), ensures that only safety verified RGB data are provided to the panel electronics
We have successfully developed, verified, and evaluated new methods for increasing the safety of the image reproduction of displays in automotive CMSs by:
Summary
Safety is essential for vehicles: In modern cars, more and more Camera Monitor Systems (CMSs) are integrated, for example, a backup camera is required by law in the United States.[1]. Autonomous cars without steering wheel and pedals like WAYMO cars[4] may populate our streets in future. A remote operator (Figure 1, top right) can login to the car system and perform remote control driving (like unmanned aerial vehicles under remote control by a human operator). Such connectivity, which is based on consumer electronics and systems like 5G networks, is far away from fulfilling Automotive Safety Integrity Level (ASIL) requirements[5] and other standards like ISO 16505.6 So both visualizations (in-car and remote operator) must be of the same quality (image perception, safety like real time, etc.)
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