What is the Lane Departure Warning and the Forward Collision Warning?

These two functions are parts of the ADAS in YI Smart Dash cam:

• The Lane Departure Warning can tell if the vehicle is about to move out of the lane based on its powerful digital image processing and recognition ability. Once the lane departure is sensed, a voice alarm will be played to warn the driver of driving safety.
• Forward Collision Warning keeps monitoring the distance between your vehicle and the vehicle in front of you based on the advanced DSP algorithm and it will alarm you once your vehicle is too close to the car in front of you.