A non-digital video signal used by most conventional video equipment for input or output. Video in which all the information representing images is in a continuous-scale electrical signal for both amplitude and time. Three basic analog video formats exist: NTSC, PAL, and SECAM. (See separate entries for more detailed information.)
The conventional NTSC television system in use today uses analog technology, in which the image sound and the picture brightness and color are represented by signals proportional to these values. The values of these signals are vulnerable to interference and noise. Digital television overcomes this vulnerability and delivers signals that are totally clean.
A video signal composed of a continuously varying electrical voltage.