6.1-channel: Any system that has provisions for a back surround
channel, reproduced by one or two speakers centered behind the
listening position, in addition to the conventional left and right
surround channels of a 5.1-channel system.
Sony/Phillps Digital Interface (SPDIF): The standard format
for exchanging digital audio signals between consumer audio
components. Connections can be coaxial or optical.
Standard-definition TV (SDTV): A subset of the digital TV
(DTV) standard covering digital signals that will yield picture
quality at least as good as that of analog NTSC television; see high
definition TV (HDTV) and enhanced-definition TV (EDTV).
Stereo: The use of two or more audio channels to provide spatial
realism or directional effects; nowadays “stereo” usually refers only
to two-channel programs, equipment, or systems.
Surround sound: A reproduced sound field that is three-
dimensional instead of a soundstage being heard primarily in front
of the listener; an audio system or part of a home theater system
that creates such a sound field. See 5.1-channel, 6.1 channel,
Dolby Digital, Dolby Surround, Dolby Pro Logic, DTS, and home
theater.
S-video: A connector that separately carries the luminance and
chrominance information for a single video image; a set of video
signals divided into luminance and chrominance components.
T
3-D comb filter, 3-D Y/C separator: Circuits used to extract
the luminance and chrominance signals from a composite-video
signal. The tree dimensions are left, right, and time.
Tint control: The consumer video-monitor control that adjusts
the general coloration of an image; see hue.
2:3 pulldown: Video processing that compensates for the
different frame rates in film (24 frames per second) as opposed to
video (30 fps).
V
Vertical blanking interval (VBI): The part of a TV signal that is
blanked to allow time for a direct-view CRT set’s electron gun to
move from the bottom to the top of the screen. An EPG, closed
captioning, Internet links, and other data can be inserted in the
VBI.
W
Widescreen: A piece of program material or a component that
contains or operates with images of wider than “normal” aspect
ratio (which is 4:3). High-definition TV’s widescreen aspect ratio is
16:9. Display of wider images on a 4:3 screen requires
letterboxing or pan-and-scan techniques.
Y
Y Pb Pr: See Component Video Connection
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