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frequencies from a small center and surrounds. The distortion on the center channel
would affect the clarity of the dialog over loud passages.
Additionally, sounds that are panning side-to-side would have different timbre while
switching among speakers (from left to center to right) accompanying the video
movement in that direction. Voices of people walking side-to-side will change their
tone as they enter the TV’s center speaker and as they depart from it, reason by
which it is recommended for the center speaker to be of similar type and timbre than
the L/R, and be driven by similar amplification as well.
Center Channel Input: Having this input in the DTV allows for the use of the
internal speakers to reproduce the sound of the center channel in the home theater
set-up. If the TV center channel input is line-level (RCA type), it can receive the
center channel signal already decoded by an external surround processor, and use
the TV set’s internal amplifier to drive the internal speakers of the TV.
If the center-channel input of the TV is speaker-level, it can receive a speaker cable
carrying an amplified center channel signal from an A/V Receiver or separate
amplifier, bypassing the TV’s internal amp. This may be useful if your audio/video
system has insufficient space to place a center channel speaker, or you might want
to start your surround system at a reduced cost. However, as mentioned in the
Center Channel description, this approach should not be permanent.
Chroma: Sometimes called ‘Hue’, is the term used to characterize color
information, such as hue and saturation (not black, gray and white). Interference of
chroma can be seen as rainbow images and color transition dots, caused by the
interaction between the chrominance and luminance components of a composite
video signal.
Circle Surround: Multi-channel surround effect produced from two channel sources
by using ambient information stored in a stereo recording, a stereo recording
encoded for surround, and recordings specifically encoded in Circle Surround. The
surround sound information sent to the surround speakers is stereo, as opposed to
the monaural approach of Dolby Pro Logic. Circle Surround creates a believable front
soundstage, apportioning the stereo signal more comfortably across the three front
channels; this makes the system appealing for music listening.
Color Fringing: Artificial outlines surrounding the edges of colored objects on the
video image.
Color Temperature: The correct color temperature of a video display should be
6500 degrees Kelvin, and expresses the color quality of a light source, which is bluer
when the Kelvin measurement is high, and reddish when is low.
Comb Filter: This filter separates the luminance and chrominance from the
composite video signal, improving, resolution, picture quality, and reducing
objectionable color patterns. Low-to-mid-line sets utilize a glass comb filter. Higherend
sets utilize a CCD or digital comb filter, which greatly enhances resolution. The
highest quality comb filters are 3D-Y/C digital comb filters, and may be motionadaptive.
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