Despite the variations, there are only two fundamental video standards you’ll encounter in the standard-definition production universe, as outlined in the following sections.
Video in North America, Japan, and South Korea is based on the NTSC (National Television Standards Committee) broadcast standard. Although NTSC refers to a specific manner of encoding a composite video signal with subcarrier-modulated color, it’s often used as shorthand for all the video formats that conform to NTSC’s standards for timing, frequency, frame rate, and line count.