NTSC - (National Television System Committee technical standard) - This is analog TV invented in 1946. NTSC has 525 lines (483 visible) interlaced, 60 fields per second. This standard is in use in North America, Japan, South Korea, Burma, Taiwan, the Philippines, and much of South America.

Must-carry - This refers to the legal obligation of cable companies to carry analog or digital signals of over-the-air local broadcasters.

Luminance - Component of the video signal that represents the brightness of the image.

Simulcast - The broadcast of the same program simultaneously over two or more different systems or channels, such as in HDTV and in NTSC. CRTC regulations require today that broadcasters simulcast much of their schedules.

Composite Video Connection - A method to interconnect video devices (such as a DTV set-top box and the analog television) by sending the signal over a single cable. This method is suitable only for analog NTSC signals

DTH - Direct-to-Home satellite delivery. May also be called DBS or Direct broadcast satellite. In Canada, Bell ExpressVu and Star Choice provide DTH services in both HDTV and SDTV.

ATSC - (Advanced Television System Committee technical standard) - This is the name of the technology used by terrestrial digital TV stations in the U.S.

ATSC - "Advanced Television Systems Committee." Formed to establish technical standards for U.S. advanced television systems. ATSC is now used as the catch-all nomenclature for DTV broadcast standards.

Widescreen - see 16 - 9

SVGA - This acronym is short for the "Super Video Graphics Array" display mode. SVGA resolution is 800 x 600 pixels.