Sheppard Cares. Sheppard AFB provides a wide variety of services to support Airmen and their families. To learn what's happening this month, check out the Sheppard Community Board. To quickly find and register for classes available on base, click the Leadership Pathways logo to the right.
NTSC stands for National Television Standards Committee. PAL stands for Phase Alternating Line. NTSC is the standard broadcast format in the United States, while PAL is the standard broadcast format in Europe, Australia, and parts of Asia.
The standard frame-rate for video systems is 25 fps (PAL) or 30 fps (NTSC). The human brain processes images perceived by the eyes at 24 fps as fluid motion. As the frame-rate keeps dropping the brain registers stutters to the fluid motion, with the stuttering becoming more pronounced at 10 fps and below.