Over-the-air Broadcast (OTA) - Also called Terrestrial Broadcast. The delivery of TV and radio signals, using UHF/VHF frequencies, directly to consumer devices. Broadcasts may be either analog or digital.
DBS (direct broadcast satellites) - These satellites are powerful enough to be received by an 18 inch dish. They use Ku-band frequencies. Companies that provide DBS services to consumers in the U.S. are DirecTV and Dish Network. Canadian DBS providers are Star Choice and Bell ExpressVu. Also called DSS.
HAVi - (Home Audio Video Interoperability) - This is a standard for 1394 bus audio and video devices. It is software that is required for the units to talk to each other. HAVi allows plug-and-play recognition of devices, interoperability, and brand independence.
FCC - (Federal Communications Commission) This is a Federal agency responsible for regulating radio wave usage and some other media. The FCC answers to Congress and also implements international radio standards.
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.
EPG - Electronic program guide. An on-screen display of channels and program data.
Letterbox - The full display of a wide aspect ratio 16 - 9 picture on a display of aspect ratio 4 - 3 will result in black bars above and below the picture. This arrangement is referred to as "Letterbox" and is often seen during movies shown on television.
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