GM is revolutionizing vehicle security with a new system that uses CSI (Channel State Information) values to trigger automatic video recording, addressing shortcomings in existing technologies. While systems like Tesla’s Sentry Mode already enable external cameras to record under certain conditions, GM’s recent filing with the European Patent Office highlights how CSI values can detect people near a vehicle more effectively. This innovation promises to enhance footage by capturing events leading up to incidents, overcoming the limitations of radar, sound, and motion-detection systems.
Existing Systems And Their Shortcomings
In most modern cars, automatic external video recording can be triggered in various ways:
- Radar-based systems mounted on the vehicle body
- Monitoring via externally mounted surround-view cameras
- Motion-detection systems that detect when the vehicle is bumped or touched
- Systems that detect people in the vicinity of a car via sound
GM says that such existing systems have various shortcomings. Obstacles in the vehicle’s vicinity can obscure radar sensors, while sound pollution and other extraneous noises reduce the effectiveness of systems depending on sound input. Touch-based systems only start recording once a vehicle is touched, failing to record potentially important footage leading up to the event.
Using CSI Values To Improve Video Recording
The key aspects of GM’s patent include:
- Two wireless communication modules, one for sending training signals and the other for receiving reflected signals, the latter called CSI values
- A signal processor that analyzes the differences between the sent and received signals, or CSI values, to determine the presence of people near the vehicle
- Examining the collected CSI values to identify people near the vehicle more effectively than traditional systems
- Recording trigger that sets the video cameras rolling when people are detected
How GM’s System Is Different
GM’s people-detecting system circumvents the shortcomings of existing systems by using CSI values to positively identify people near the vehicle, thereby starting video recording before an event takes place so that the footage includes the lead-up to the event. This can improve vehicle security by eliminating the blind spots of existing systems, making this patent unique in its multi-layered detection capability.
