S-Video stands for separate, or super, video. This is a technology used for transmitting video signals over a cable by separating the video information into two different signals: one signal for color (chroma) information, and the other signal for brightness (luma) information. So basically one signal, the luma, transmits information in black and white, and the other signal, the chroma, transmits all the color information. When these signals are sent to a television, this results in sharper images than composite video , where video information is transmitted as one signal over one wire. This is because televisions are intended to display separate Luma (Y) and Chroma (C) signals. S-video does this as it was intended.