what‘s Dash Cam
A dashboard camera or simply dashcam, also known as car digital video recorder (car DVR), driving recorder, or event data recorder (EDR), is an onboard camera that continuously records the view through a vehicle‘s front windscreen and sometimes rear or other windows. Some dashcams include a camera to record the interior of the car in 360 degrees inside camera, usually in a ball form, and can automatically send pictures and video using mobile connectivity. In commercial fleets, dashcams are a core component of video telematics systems, which are a key technology used in the broader trend of fleet digitalization.
EDRs and some dashcams also record acceleration/deceleration g-force, speed, steering angle, GPS data, voltage of the power source (vehicle‘s electrical net), etc.
A wide-angle 130, 170° or more front camera may be attached to the interior windscreen, to the rear-view mirror (clip on), or to the top of the dashboard, by suction cup or adhesive-tape mount. A rear camera is usually mounted in the rear window or in the registration plate, with an RCA video output to the display monitor/screen.
The resolution will determine the overall quality of the video. Full HD or 1080p (1920×1080) is standard for dash HD cams. Dash cameras may have 1080p, 1296p (common for Chinese dashcams), 1440p, or higher definition for a front camera and 720p for a back camera and include f/1.8 aperture and night vision mode.
Functions
To ensure that recorded video files are not tampered with once they have been recorded, videos can be timestamped in a tamper-proof manner, a procedure termed trusted timestamping.To ensure a reliable 24/7 parking surveillance when capacity is an issue, a motion detector may be used to record only when an approaching human/vehicle is detected, in order to save power and storage media.[1]
Advanced driver assistance system ADAS and park location save can be included.