Epson 1EMP-S1 manual Glossary, =Progressive scanningg, i=Interlaced scanningg

Glossary

Complex terms used in this book, or terms not explained in the body of the text, will be briefly explained here. For further explanation, please consult commercially available reference texts.

5BNC	A type of connector used to input analog video
	signals.
Aspect ratio	The ratio between an image's length and its height.
	Images which have an aspect ratio of 16:9 are called
	Widescreen. The aspect ratio for standard images is
	4:3.
Color	The temperature of an object which is emitting light.
Temperature	When the colour temperature is high, colours tend to
	take on a bluish tinge; when the colour temperature
	is low, colours tend to take on a reddish tinge.
Component	A type of video signal which has the video
Video	brightness and colour signal information separated,
	in order to provide better image quality. In high-
	definition TV (HDTV), it refers to images which
	consist of three independent signals: Y (luminance
	signal), and Pb and Pr (colour difference signals).
Composite Video	The standard home video signal (NTSC, PAL,
	SECAM) which has the video brightness and colour
	signal information mixed together. Composite video
	consists of the carrier signal Y (luminance signal)
	and the chroma (colour) signal, combined within the
	colour bar signal.
Contrast	The relative brightness of the light and dark areas of
	an image can be increased or decreased in order to
	make text and graphics stand out, or appear softer.
	Adjusting this particular property of an image is
	called "contrast adjustment".

	EMP-S1 User’s Guide	62
Cool-down	The process used to cool down a projector lamp that
	is hot from use. Cool-down happens automatically
	when the [Power] button is pressed on the projector
	or on the remote control to turn the projector off. Do
	not unplug the projector power cable whilst it is
	cooling down. If cool-down is interrupted, heat from
	the lamp gets trapped inside the projector, potentially
	shortening the life of the lamp and causing projector
	failure.
Dolby	An audio format developed by Dolby Laboratories.
digital	Normal stereo is a 2-channel format which uses two
	speakers, whereas Dolby Digital is a 6-channel (5.1-
	channel) system which adds a centre speaker, two
	rear speakers and a sub-woofer.
HDTV	An abbreviation for High-Definition Television, it
	refers to high definition systems which satisfy the
	following conditions.
	• Vertical resolution of 750p or 1125i or greater
	(p=Progressive scanningg, i=Interlaced scanningg)
	• Screen aspect ratio of 16:9
	• Dolby digitalgl audio reception and playback (or
	output)
Interlaced	Each screen is divided into fine horizontal lines
scanning	which are displayed in sequence starting from left to
	right and then from top to bottom. This method of
	image scanning, whereby even numbered lines and
	odd numbered lines are displayed alternately, is
	called Interlaced scanning.
Progressive	A method of image scanning whereby the image data
scanning	from a single image is scanned sequentially from top
	to bottom to create a single image.