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We have compiled a list of audio, video and home theater terms that you
might find helpful as you research your next purchase.
From A-Z, this glossary should have all the answers.
Glossary of Terms:
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I
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 (See also
Firewire)
Imaging
The ability to localize the individual sound sources in three-dimensional space.
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. (See also
Ohm)
Integrated Amplifier
A combination preamp and amplifier in one component.
Interconnects
Any cable or wire running between two pieces of A/V equipment. For example, RCA terminated cables connecting pre/pros and amps.
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.
Inverted Dome
A type of speaker-driver shape; usually used for tweeters (concave).
Isobarik
Also known as compound loading. By using two 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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