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.
There are various Video/Television standards in use. Important ones are CCIR/PAL, EIA/NTSC, SECAM etc. The major difference between these standards is in the no. of scanning lines and frame frequency.CCIR standard has 625 lines/frame and 25 frames/sec. EIA standard has 525 lines/frame and 30 frames/sec.. CCIR/PAL standard video signal has 625 lines/frame and it repeats @ 25 frames/sec. 2. Each frame is split into 2 fields; - each consisting of 312.5 lines, called odd and even fields. Thus field rate is 50.