A VIDEO CAMERA, OR CAMCORDER, records a scene as a sequence of 25 or 30 still images per second, along with sound. It comprises a video camera to capture light from the scene, a viewfinder through which the scene may be viewed, a screen on which the recorded scene may be viewed, a charge-coupled device (CCD) to convert the visual data into an electric signal, and a means of storing the signal. Digital video cameras convert the signal into digital form—a series of separate measurements of the initial analogue (continuously varying) signal. They record the digital signal, usually on a chip or hard disk. Video cameras often have a slot where a memory card can be inserted
to expand the memory and store longer recordings or more still pictures.
