Freeze frame television

Freeze frame television: Television in which fixed ("still") images are transmitted sequentially at a rate far too slow to be perceived as continuous motion by human vision.

Note: Transmission of an image is usually performed periodically by a processing unit[?] that contains memory in which data representing the image are stored. For an image of specified quality, e.g., resolution and color fidelity[?], freeze-frame television has a lower bandwidth requirement than that of full-motion television.

Source: from Federal Standard 1037C