11Reference
Glossary
The following is a list of key words used in the use of projectors and image signals and their explanations. Please refer to it when using this manual.
For an explanation of vocabulary used in the menu, refer to "Menu group items and functions” ( ☞ page 25).
Ceiling mount bracket | Interlace |
The mounting hardware used to hang this unit from the ceiling. | The most common type of scanning used in televisions. It divides a |
Two types of bracket are available, for high and low ceilings. | screen into even and odd numbered fields for scanning, and then |
Ceiling mount brackets are sold separately. | builds an image by combining them into one image (frame). |
Cinemascope size
The widest film format in 70 mm film, with an aspect of 2.35:1.
Color spacing
The conversion of YUV color separated signal to RGB signal. There are two formats for this, BT.601 for SDTV, and BT.709 for HDTV. This unit switches between them as required.
Component video signal
A method of sending video signals with independent luminance and color signals. Component video gives a higher image quality than ordinary composite video because it bypasses mixing and separating circuits. Component video signal consists of three lines, the luminance signal (Y), and two color difference signals (PB/CB, PR/CR).
Keystone Correction
Using the unit at an angle to the screen distorts the projected image trapezoidally. You can use Keystone Correction to electronically correct this distortion.
Letterbox
A method of converting the content of landscape oriented film to a 4:3 signal. You can watch landscape images without trimming them by adding a black bar to the top and bottom of the screen, however this sacrifices vertical resolution to some extent.
Progressive
A method of displaying all scanning lines in a frame at once, reducing flicker noticeable on a larger screen and creating a sharp, smooth image. This unit uses progressive scanning for progression.
Composite video signal
The most common type of video signal, combining luminance and color signals in one line. This method requires mixing and separating processes on both the send and receive sides. Use a pin cable for connection.
DCDiTM function
Directional Correlational Deinterlacing, a high quality image circuitry developed by the Faroudja company. DCDiTM uses edge cutting techniques to remove jagged edges from images during Interlace to Progressive conversion, allowing smooth, natural reproduction of images.
DLPTM technology
Digital Light Processing, an image display engine used in projectors that use the DMD™ chip developed by Texas Instruments.
D terminal
A cable that allows transmission of all of the signals in composite video in one cable. This method is used for transmitting image signals between the latest AV components. There are 5 methods of transmission,
HDCP
A technique designed to protect the video transmission between a DVI or HDMI transmitter and a display device.
HDMITM
RGB Signal
A method of transmitting color information using a numeric representation of the primary colors red, green, and blue separately. When received, it is expressed in various colors by adding a mixing colors. RGB is widely used for sending and receiving color images between computers, and requires horizontal and vertical sync signals.
SDTV
Standard Definition Television, a term used to define normal television broadcasts which do not meet HDTV standards.
Smart zoom
Expands the left and right sides of a 4:3 image without altering the center, when you are attempting to project a 4:3 image on a wide screen format. This creates some distortion at both edges.
Squeeze
A method of compressing film images horizontally to an aspect of ratio of 4:3 when recording to video medium. The raw image is oblong, so needs to be passed through a desqueezing circuit to be projected in it’s original form.
Standby
The state in which the circuit that receives
S Video signal
S stands for Separate. A method of sending signals with separate luminance (Y) and color (C) signals. Use a
11
Reference
HDTV | Sync. |
Computers output signals with a given regular frequency, which | |
satisfy the following conditions: | you must synchronize the projector to in order to produce a good |
• A vertical resolution of 720p or 1080i (p stands for progressive | quality image. If you do not match the phase of the signal, the |
scans, ; stands for interlace scans) | image may be flickery, faded, or distorted. |
• A 16:9 aspect ratio |
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