Abstract: An event recorder (10) mounted in a vehicle (20) includes sensors, including image sensor (60), sound sensor (90), location sensor (95), and vehicle performance sensors, and a capture circuit for storing sensed data signals around a triggering event. A CPU and program memory (74) are programmed to perform a validation function, such as a one-way hash function, on the captured sensor signal while transferring it to persistent memory device (100) so as to derive a validation value which is also stored in persistent memory device (100). To later verify that the data have not be tampered with, the stored data are operated on by the same validation function so as to derive an audit validation value, the audit validation value is compared with the validation value for equality and the outcome of the comparison is indicated.

Abstract: An event recorder (10) mounted in a vehicle (20) includes one or more wave pattern detectors (200) for detection and recognition of the presence of a predetermined wave produced external the vehicle (20) and for producing a trigger signal denoting predetermined wave presence. Event recorder (10) includes sensors, including image sensor (60), sound sensor (90), location sensor (95), and vehicle performance sensors, and a capture circuit for storing sensed data signals for the time period before, during and after the wave was detected. A playback circuit (13) presents the captured data. The detected wave is produced such as by the police or fire department, or by an emergency vehicle, and is typically produced for a purpose other than being detected by wave detector (200). Wave detector (200) may be illumination wave, e.g. infrared beam or flash, detector (230), a radar detector (214), a laser kB detector (224), a flashing light detector (240), or a siren detector (250).

Abstract: An event recorder (10) mounted in a vehicle (20) includes sensors, including image sensor (60), sound sensor (90), location sensor (95) , and vehicle performance sensors, and a capture circuit for storing sensed data signals around a triggering event. A CPU and program memory (74) are programmed to perform a validation function, such as a one-way hash function, on the captured sensor signal while transferring it to persistent memory device (100) so as to derive a validation value which is also stored in persistent memory device (100). To later verify that the data have not be tampered with, the stored data are operated on by the same validation function so as to derive an audit validation value, the audit validation value is compared with the validation value for equality and the outcome of the comparison is indicated.