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IEEE
1394 - Networking standard for PCs. Combined
with 5C copy protection, is used as a two-way connection
to transfer the MPEG-compressed digital bitstreams
between consumer electronics items, including HDTV
tuners and displays, D-VHS recorders, DVD players, and
DBS receivers. Also called FireWire and iLink.
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iLink
- See IEEE 1394.
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Integrated Amplifier - A combination preamp
and amplifier.
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Interconnects - Any cable or wire running
between two pieces of A/V equipment. For example, RCA
terminated cables connecting pre/pros and amps.
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Interlace - Process of alternating scan lines
to create a complete image. In CRT displays, every
second field/frame is scanned between the first
field/frame. The first field represents the odd lines;
the second field represents the even lines. The fields
are aligned and timed so that, with a still image, the
human eye blurs the two fields together and sees them as
one. Interlace scanning allows only half the lines to
be transmitted and presented at any given moment. A
1080i HD signal transmits and displays only 540 lines
per 60th of a second. 480i NTSC transmits and displays
only 240 lines per 60th of a second. Motion in the
image can make the fields noticeable. Interlaced images
have motion artifacts when two fields don't match to
create the complete frame, often most noticeable in
film-based material.
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Interlaced Scan - See Interlace. Interlaced
scan refers to a video image that is displayed on a
screen by scanning or displaying each line (or row of
pixels) that make up the image, in an alternate order.
In other words, the image lines (or pixel rows) are
scanned down the screen from top to bottom, in an
alternate order (lines or rows 1,3,5, etc... followed by
lines or rows 2,4,6). The entire image is displayed
every 30th of a second.
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Inverted
Dome - A type of speaker-driver shape;
usually used for tweeters (concave).
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Imaging
- The ability to localize the individual sound sources
in three-dimensional space.
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Impedance - A measure of the impediment to
the flow of alternating current, measured in ohms at a
given frequency. Larger numbers mean higher resistance
to current flow.
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Isobarik
- Also known as compound loading. By using two (2) low
frequency drivers (generally mounted face-to-face and
wired electrically out-of-phase or mounted front-to-back
in a shallow tube and wired electrically in phase) you
can halve the volume of the cabinet without reducing the
low frequency extension of the subwoofer.
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