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.
Composite Video - An analog video signal (NTSC, PAL or SECAM) that includes both luminance (brightness) and chrominance (color) signals encoded together to form a single signal.
Closed Captioning - A data stream included in broadcast signal that provides text and/or narrative description of dialogue, sounds, and other elements of the picture for viewers with visual or auditory impairments.
EDTV - Enhanced Definition Television. A term defining a television that displays the picture (either from SDTV or HDTV) at a resolution of 480p lines in either 4 - 3 or 16 - 9 aspect ratio and which includes Dolby Digital AC-3 multichannel sound.
Upconvert - The process which increases the number of pixels or frame rate used to represent an image by creating new pixels at closer spacing. For instance SDTV video having 720 x 480 pixels may be upconverted to 1280 x 720 pixels for use as HDTV. The upconversion process does not increase the resolution of image.
DVD - Digital Versatile Disk. An optical recording media similar to the familiar CD but having seven times its capacity on a single side. In television applications, DVD's are capable of carrying full-length commercial movies, plus additional material such as outtakes, director's notes, movie trailers, etc.
Line Doublers - This device converts NTSC or 480i into 480p. Line doublers with motion-adaptive processing can to an extent turn a 30 frames/sec image into a 60 frames/sec image, thus removing some of the jerkiness and blurriness associated with motion.
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