Cable Modem - A data modem that provides an Internet connection over the TV cable network. Video-on-demand or interactive services may require such a connection.
Transponder - A satellite channel. There is often one program per transponder. Some transponders are wider than 6 MHz and can carry more than one NTSC program. Several digital channels can fit on one transponder.
DTV - "Digital television." This comprises all the components of digital television, including HDTV, SDTV, datacasting, and multicasting, falling under the standards established by the ATSC.
Comb filter - A circuit in NTSC sets that separates the color information from the brightness information.
Fps - Frames per Second. To give the illusion of motion, television actually transmits a series of snapshot pictures referred to as frames. Increasing the frame rate improves motion smoothness and may reduce flicker in some displays. In Canada both analog and digital television transmits 30 Fps.
LFE - (Low Frequency Effects) - Sub-woofer. The 6th channel in a 5.1 channel system.
Dolby Digital (Dolby AC-3) - The 5.1 channel audio standard for DTV and HDTV in Canada and the USA. It includes six discreet audio channels - Left, Center, Right, Left Surround (or side), Right Surround (or side), and a subwoofer -- LFE, "low frequency effects" -- (considered the ".1" as it is limited in bandwidth). Many televisions process these six channels into a two channel stereo pair and do not provide the full 5.1 channel surround sound.
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