Philips AV-HS300G manual Gpi, Ire, Pgm, Pst

Appendix (glossary)

Word	Explanation
Genlock	A function for synchronizing the video signals using an external sync signal as
	the reference.
GPI	Interface signals which control auto transition from an external source.
[General Purpose Interface]
IRE	A unit used for video signal levels.
	The setup level (black level) of the signals is expressed as 0 IRE, 7.5 IRE, etc.
Hue	The color tone of the video signals.
Key Edge	The border or shadow added to the edges of keys.
Key Fill	The signal that uses key combination processing to fill in the areas left blank by
	the key signals.
Key invert	A function which inverts the key signals.
Key Source	The video signals for creating the key signals.
Linear Key	The function which combines keys using monochrome key signals with
	gradations in its outlines as a reference.
Lum	The brightness portion of the video signals.
[Luminance]
Luminance Key	The function which creates key signals based on the luminance (brightness)
	information of the video signals to combine keys.
ME	A video effect device which combines a number of video signals to create mix,
[Mix Effect]	wipe, key and other video signals.
Mix	The picture-changing effect produced by overlapping one image with the next.
	It is also referred to as “dissolve”.
PVW	The function for checking ahead of time the image which will be output after the
[Preview]	next transition. The image is output from the PVW system.
PGM	The bus which always carries the program output signals.
[Program Bus]
PST	The bus which carries the program output signals after the next background
[Preset Bus]	transition.
Preset Memory	The memory in which the control panel statuses can be saved and recalled.
	The switch selection statuses as well as the border, color and other setting
	information can be saved in this memory.
RS-422	A serial interface standard. It is the interface used to control the switcher from
	an editor or other external device.
Sat	This refers to the intensity of the color chrominance level of video signals.
[Saturation]

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