The advanced driving assistance system is one of the fastest growing applications in the automotive electronics market. In the drive safety requirements and government regulations driven, the camera sensor has become the key automotive electronic components. Car camera module sales are expected to reach 34 million units in 2017, compared with just 6 million 100 thousand units in 2010. This is partly because the U.S. National Highway Traffic Safety Administration (NHTSA) regulations require that car sales in the United States should be equipped with at least one rear view camera since 2014. Similar regulations will promote the adoption rate of cameras in cars, and in order to differentiate, car manufacturers will configure multiple cameras in high-end models.
In addition to the rear view camera, parking assistance, automotive vision applications include night vision systems, an internal rearview mirror alternative, and a 360 degree car camera display system. Using the automobile vision system, the driver can observe the video or image collected by the security camera from the on-board display device to realize safe driving.
In addition, there are some applications that depend on the driver's judgment. After catching sensor data, based on the machine vision system, the on-board processor automatically controls the vehicle to achieve a specific function, such as lane separation, signal recognition, and collision detection.
With the increasing level of vehicle intelligence, the higher the intelligence requirements of these car cameras, the high resolution camera module should be able to detect, identify, analyze, and respond. The introduction of more video data also requires higher bandwidth and cost for on-board buses. Industry professionals are competing to develop proprietary technology for open network standards to provide higher bandwidth and lower overall user ownership costs.
Ethernet becomes a natural choice for such network physical layers. In ISO 17215, the camera video communications interface (VCIC) specification uses Ethernet as the connection bus for on-board cameras / sensors. Figure two is a 360 degree fisheye camera(rearview camera) case based on an Ethernet connection. According to the video information to judge and to give the driver to leave enough response time, the image accuracy and quality will continue to improve, so the image processing has become an important part of the vehicle system. The sharp increase in the task of image processing also brings great challenges to camera module manufacturers, and their products must be balanced between performance and power consumption to meet the stringent environment of vehicles and not occupy too much space.