S-Video
An analog video signal that carries video data as two separate signals: luma (luminance) and chroma (colour), to reduce the possibility of interaction.
This differs from composite video, which carries picture information as a single lower-quality signal, and component video, which carries picture information as three separate higher-quality signals.
S-Video was created to try and avoid the picture degradation that can occur with composite video. S-Video carries standard definition video (typically at 480i or 576i resolution), but does not carry audio on the same cable.