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RCA Connector
-
Standard pin plug or jack used to connect audio and
video components, developed by RCA Laboratories. Also
known as a phono plug or jack, even when applied to non-phono
equipment.
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Rear Channel Speaker
- A
Loudspeaker that is located beside or behind the
listener in a surround sound system.
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Rear Projection Television
- A video
monitor/television where the image comes from behind the
screen; sometimes directly projected or sometimes
bounced off of 2 or more mirrors to appear on the back
of a screen.
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Receiver
- An audio (and/or video)
component that combines a pre-amplifier, amplifier(s)
and tuner in one chassis. A home theater receiver will
also contain multi-channel surround decoders, such as
Dolby Digital and DTS.
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Re-EQ
- Short for Re-equalization. A feature found on
THX-certified receivers and pre/pros. Movie soundtracks
are mixed for theaters or far-field monitors with an
expected high-frequency roll-off otherwise known as an
X-curve. If these soundtracks are not re-mixed for home
use, they will sound too bright when played back through
home speakers or near-field monitors. Re-EQ inserts an
X-curve response into the signal to compensate for this,
which takes out some of the soundtrack's excess edginess
or brightness.
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Regional
Coding - Used
by studios to control DVD release dates by geographic
regions of the world, DVD players are designed to play
DVDs their respective region only. The geographic
regions are as follows: Region 1: United States, Canada.
Region 2: Japan, Europe, western Asia and South Africa
(Turkey, Egypt, Saudi Arabia, South Africa). Region 3:
Korea, Thailand, Vietnam, Borneo, Indonesia. Region 4:
Australia, New Zealand, Mexico, Caribbean, South
America. Region 5: India, Africa, Russia (nations of
the former USSR). Region 6: Peoples Republic of China.
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Resistance -
Resistance to the flow of electrons through a circuit
measured in Ohms. Resistance is the natural by-product
of a circuit. Resistance is one part of a circuit's
total impedance.
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Resolution -
Density of audio or video. The number of scan lines or
pixels in a given image size is a video resolution.
Resolution can also apply to digitally encoded audio as
the number of bits and cycles per second; bits/cycles
IE: 24/96Khz. is an expression of audio resolution from
a digital source.
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Resonant
Frequency -
The frequency at which any system vibrates naturally
when excited by a stimulus. A tuning fork, for example,
resonates at a specific frequency when struck.
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Reverberation
- The reflections of sound within a closed space.
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Reverberation Time
- The amount of time it takes the reverberation to decay
60 dB from the level of the original sound.
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RF
- Abbreviation for Radio Frequency. Television signals
are modulated onto RF signals and are then demodulated
by your television's tuner. VCRs and DBS receivers
often include channel 3 or 4 modulators, allowing the
output signal to be tuned by the television on those
channels. Also, laser discs used an RF signal for
modulating Dolby Digital 5.1 soundtracks on some movies.
This requires an RF demodulator (usually referred to as
an AC3-RF demodulator) before or in the surround
processor to decode the signal.
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RF
Connector - A
coaxial connection on a tuner capable of tuning signals
from an antennae or cable TV.
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RFI
- Abbreviation for Radio Frequency Interference. RFI is
any RF or EMF that interpreted as noise to electronic
circuits.
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RGB
- Short for Red, Green, Blue. Can refer to an
unprocessed video signal or the color points of a
display device. Together these three colors make up
every color seen on a display device.
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Ribbon
Speaker - A
loudspeaker that consists of a thin, corrugated,
metallic ribbon suspended in a magnetic field. The
ribbon acts electrically like a low-impedance voice coil
and mechanically as a diaphragm.
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RMS
-
Abbreviation for root mean square. A power measurement
(measured in watts) used in audio to help rate the
continuous power output of an amplifier or input
capability of speakers.
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RPTV
- Abbreviation for Rear-Projection Television. Any TV
that employs projection within its own box to increase
the size of the picture. This is accomplished with
mirrors, lenses and a screen onto which to display the
picture to the audience. Usually RPTVs are large
TV sets from 40" and up and aren't limited to any one
display type. RPTVs can be CRT, LCD or LCoS or DLP. |
