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Chapter 7 Help & Assistance
Chapter 7 Help & Assistance
153
MPEG (Motion Pictures Experts Group): Refers to the standards widely used for compression of digital video.
NTSC (National Television Standards Committee): Industry group that established the television standards used
with analog television transmission. Also used to refer to the American television transmission standard for
analog broadcast (i.e., an NTSC channel refers to a broadcast displayed on a television that meets the NTSC
guidelines for analog transmission).
Off-air (also called terrestrial and Over-The-Air): Broadcasts transmitted over the airwaves using powerful
transmitters, and received via antennas.
OTA (Over-The-Air): Broadcasts transmitted over the airwaves using powerful transmitters, and received via
antennas. OTA broadcasting is regulated in the U.S. by the Federal Communications Commission (FCC).
Pixel (picture element): The picture you see on your TV is comprised of pixels. Specifically, a pixel is the smallest
unit of area of a video screen image that can be turned on or off, or varied in intensity. The more pixels
displayed on a screen of a given size, the sharper the picture. The number of pixels in an NTSC picture is about
200,000. DTV pictures contain a minimum of 300,000 pixels. SDTV pictures contain up to 1 million pixels, and
HDTV is defined as pictures ranging from 1 million to 2 million pixels.
Progressive scan: The system of scanning an entire video picture with each scan as opposed to interlaced which
scans every other line. Some Digital Television signals use progressive scanning, but most use interlaced as do
NTSC signals.
Resolution: Resolution is measured in terms of the density of the picture elements (pixels) and is the total
number of pixels (horizontal x vertical) used to display images on the screen. High-resolution images are
composed of more dots per inch and appear smoother than low-resolution images. The higher the resolution,
the better the display of details.
RF jacks: On this TV, ANTENNA A IN or ANTENNA B IN jacks. Coaxial cables are connected to RF jacks.
RGB Imagers (Red, Green, Blue imagers): Your LCOS HDTV’s imagers are each dedicated to a specific color (red,
green, or blue). White light shines on the imagers and the prism mixes the colors appropriately to create all of
the colors you see on the screen.
RJ-11: Technical abbreviation for the type of phone jack found in most homes.
SAP (Second Audio Program): Used to broadcast bilingual broadcasting, or descriptive video services for the
visually impaired. The TV must have an SAP decoder and the program must be broadcast in SAP in order to hear
the SAP broadcast.