Epson EB-S18 Guide de l'utilisateur télécharger pdf (Page 128)

This section briefly explains the difficult terms that are not explained in the text of this guide. For details, refer to other commercially available publications.

Ad hoc mode

A method of wireless LAN connection that communicates with wireless LAN clients without using an access point.

Aspect Ratio

The ratio between an image's length and its height. Screens with a horizontal:vertical ratio of 16:9, such as HDTV screens, are known as wide screens.

SDTV and general computer displays have an aspect ratio of 4:3.

Component Video

A method that separates the video signal into a luminance component (Y), and a blue minus luminance (Cb or Pb) and a red minus luminance (Cr or

Pr).

Composite video

A method that combines the video signal into a luminance component and a color component for transmission down a single cable.

Contrast

The relative brightness of the light and dark areas of an image can be increased or decreased to make text and graphics stand out more clearly, or to

make them appear softer. Adjusting this particular property of an image is called contrast adjustment.

DHCP

An abbreviation of Dynamic Host Configuration Protocol, this protocol automatically assigns an IP address

to equipment connected to a network.

Gateway Address

This is a server (router) for communicating across a network (subnet) divided according to subnet mask

HDCP

HDCP is an abbreviation for High-bandwidth Digital Content Protection. It is used to prevent illegal copying and protect copyrights by encrypting

digital signals sent over DVI and HDMI ports. Because the HDMI port on this projector supports HDCP, it can project digital images protected by

HDCP technology. However, the projector may not be able to project images protected with updated or revised versions of HDCP encryption.

HDTV

An abbreviation for High-Definition Television that refers to high-definition systems which satisfy the following conditions.

• Vertical resolution of 720p or 1080i or greater (p =

Progressive

, i = Interlace

)

• Screen

aspect ratio

of 16:9

Infrastructure mode

A method for wireless LAN connection in which devices communicate through access points.

Interlace

Transmits information needed to create one screen by sending every other line, starting from the top of the image and working down to the bottom.

Images are more likely to flicker because one frame is displayed every other line.

IP Address

A number to identify a computer connected to a network.

Progressive

Projects information to create one screen at a time, displaying the image for one frame. Even though the number of scan lines is the same, the amount

of flicker in images decreases because the volume of information has doubled compared with an interlace system.

Refresh Rate

The light-emitting element of a display maintains the same luminosity and color for an extremely short time. Because of this, the image must be

scanned many times per second to refresh the light-emitting element. The number of refresh operations per second is called the Refresh Rate and is

expressed in hertz (Hz).

SDTV

An abbreviation for Standard Definition Television that refers to standard television systems which do not satisfy the conditions for HDTV

High-

Definition Television.

SNMP

An abbreviation for Simple Network Management Protocol, which is the protocol for monitoring and controlling devices such as routers and

computers connected to a TCP/IP network.

Glossary

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