ATSC: An acronym for advanced television systems committee, and the name of the DTV system used by broadcasters in the U.S.
Compression refers to the reduction of the size of digital data files by removing redundant and/or non-critical information ("data" being the elements of video, audio and other "information"). Digital TV in the U.S. would not be possible without compression.
Some HDTV sets have an input like SVGA or VGA that allows the TV sets to be connected to computers.
See "codec." A device or program that translates encoded data into its original format (i.e., it decodes the data.)
A service provided by many cable providers, digital cable offers viewers more channels. Contrary to many consumers' beliefs, digital cable is not the same as High-Definition Television or digital television; rather digital cable simply offers cable subscribers the options of paying for more services.
DTV monitors are televisions that can display a digital signal but lack an integrated tuner (unlike an integrated digital set), and thus cannot receive a digital broadcast signal without an additional set-top box.
Digital Television (DTV)
Digital TV is the umbrella term encompassing High-definition Television and several other applications, including Standard Definition Televison, datacasting, multicasting and interactivity.
A digital tuner serves as the decoder required to receive and display digital broadcasts. It can be included inside TV sets or via a set-top box.
Process by which a high-definition signal is converted to a standard definition picture.
This acronym stands for "Enhanced Definition Television." It refers to a complete products/system with at least a digital receiver display scanning format, and Dolby Surround Sound audio output capabilities.
This is when TV programming features interactive content and enhancements, blending traditional TV viewing with the interactivity of a personal computer.
NTSC is the acronym that stands for National Television Systems Committee"and the name of the current analog transmission standard used in the U.S., which the committee created in 1953.
Pixels Per Inch
Pixels per inch (PPI) is a measure of the sharpness (that is, the density of illuminated points) on a television display screen.
Standard Definition TV Format (SDTV)
There are two main digital formats - HDTV and SDTV. SDTV typically does produce better quality images than that of traditional analog TV and pictures somewhat akin to digital cable. However, its images are not nearly as sharp as the images from the ultimate form of digital television ¾ High-definition TV (HDTV).
Set-top Converter Box
This unit sits on top of the viewer's analog TV, receives the Digital TV signal, converts it to an analog signal, and then sends that signal on to the analog TV.
This acronym is short for the "Super Video Graphics Array" display mode. SVGA resolution is 800 x 600 pixels.