Horizontal Scan Rate
The rate at which the lines of the incoming signal are refreshed. The rate is set by the horizontal synchronization from the source and
measured in Hertz.
Hs + Vs
Horizontal and vertical synchronization.
Hue
The graduation (red/green balance) of color (applicable to NTSC).
Interlacing
A method of updating the image. The screen is divided in two fields, one containing every odd horizontal line, the other one containing the
even lines. The elds are then alternately updated. In analog TV interlacing was commonly used as a way of doubling the refresh rate without
consuming extra bandwidth.
Interleaving
The alternation between left and right eye images when displaying 3D.
IRE
A unit used to show the range from black to white in Composite Video signals.
LED (Light Emitting Diode)
An electronic component that emits light.
Lens extension
The distance between the front of the projector and the front of the mounted lens. When a long lens is intended to cover a relatively short
throw distance, lens extensions should be taken into account when calculating the throw ratio as the error margin for such calculations
should not exceed 5%.
Notes
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