i.LINK:
AKA i.Link or IEEE 1394, Sony's brand name for Firewire. A type of connection used to connect audio/video equipment and computers.
Impedance:
A term in electronics which measures the amount of opposition a device has to an AC current (such as an audio signal). Technically speaking, it is the combined effect of capacitance, inductance, and resistance on a signal.
More info: Microphone Impedance
Indeo:
A digital video compression format.
Infra-red:
Frequencies beyond the red end of the visible spectrum, i.e. frequencies with longer wavelengths than red light.
Perceived by humans as heat. Commonly used for remote-control devices.
Infotainment:
Television programming which blends information and entertainment.
More info: Infotainment
Interface:
The point of contact between a tool and it's operator. A human/computer interface could be a keyboard or a mouse.
Interlace:
The method of dividing a video frame into two fields; one made up of the odd-numbered horizontal lines, the other made up of even-numbered lines.
Internet:
If you don't know what the Internet is, you're in trouble.
Related info: Internet tutorials
Intranet:
A "closed-circuit internet". A local network of computers linked in much the same way as the wider internet.
Iris:
The circular opening (aperture) which controls the amount of light passing through to the camera's sensing element or film.
More info: Video camera iris