Body worn video (BWV), also known as the body of the camera, is a video recording systems that is worn on the body. It is often using law enforcement to record their interactions with the public or capture video evidence at the crime scene. It can increase officer and residents accountability. Currently, more and more different body worn video cameras are available on the market, including those that are clipped on clothing, an ear piece, or glasses. It often on the front of clothes and provides for first-person perspective and a more details of evidence. （无）
The first video recording system has apply in the real life in the 1960. However, due to the limitation of technology, that video camera has big size and bad quality of recoding. It was not convenient to carry this video recording camera. At the end of 1960s, a popular science magazine article featured by the Connecticut police tried to install a video camera and a video recorder. The camera was on a small tripod and need full passenger side of the front seat with the back seat fully loaded with a recorder and a cable connecting the two devices. However, the equipment is too heavy, so that it is only used in the actual
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In the next step in the development of mobile video recorder is launched a VHS video recorders and video tape and subsequently introduced into 8 mm camcorder.Along with miniaturization came affordability, which catapulted audio/visual recordings into the mainstream of policing. In addition to the installation of closed circuit televisions(CCTV), the agency began to use these devices to record the crime scene. It can provide a more complete, comprehensive view and allows personnel to operate these systems for surveillance, interrogation, and