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GLOSSARY

16:9 Conversion: Movies are recorded by means of a special camera technology (anamorph), which compresses the image width. To display the right format, the correction can either be made on the DVD player or on the projector. We recommend that the conversion is carried out via a 16:9 format conversion inside the projector.


ANSI lumens: unit of measurement for the brightness of LCD projectors based on ANSI (American National Standards Institute). An area of 1 sqm on a screen is divided into 9 equally sized rectangles. The mathematical average of the light intensity in the centre of each area equals the ANSI lumens value.


AutoSetup/AutoSynch: The projector recognises the input source and automatically adjusts itself. 


BNC: A popular connector used by video professionals which produces excellent performance. Workstations have BNC cables with 5 connectors: one each for the three basic colours red, green and blue and one each for horizontal and vertical synch. 


Component Signal: Also described as colour difference – or YUV signal. The video signal is split into one brightness and two colour difference signals which are transferred separately. The image quality of the component signal is better than S-Video and therefore is employed frequently e.g. for the connection to DVD players.


Compression: Many projectors are able to display higher resolutions than they actually have by skipping lines and columns. As this affects the picture quality, several manufacturers have developed special compression methods which actually compress with only the slightest loss of information.


Contrast: Indicates the ratio of black and white in an image. The higher the value the more contrast and focus the image has.


DLP: “Digital Light Processing”. Technology developed by Texas Instruments that uses electronically adjusted mirrors (each the size of 1/1000 of a human hair) to project light from the projection lamp onto the screen.


DVI: “Digital Visual Interface” is a new transmission standard that enables the digital transfer of computer data to a monitor, plasma display, projector etc. As there is no conversion to an analogue signal, the image quality improves significantly.


Eco mode = WhisperMode: Reduction of light output when using a digital projector. Reduces the fan noise and prolongs the lamp life.


Freeze: “Freezes” the current image to enable programme changes without viewers noticing. 


Resolution: The amount of horizontal and vertical pixels. The closer the data source’s and projector’s resolutions are synchronized the better the image.


SVGA: “Super Video Graphics Array”. Graphic standard for PCs with a maximum resolution of 800 x 600 pixels. 


S-Video: High quality video signal, where the light signals are separated from the colour signals. DIN A 4 pin connector i.e. used with S-VHS recorder. 


SXGA: Super Extended Graphics Array. Graphic cards with a resolution of 1,280 x 1,024 pixels.


USB: “Universal Serial Bus”. Standard interface under Windows 98 which replaces the serial, parallel and other interfaces on the PC. Hardware components are automatically detected, configured and are instantly available when connected to the PC. Currently only usable for the mouse interface with projectors. 


UXGA: “Ultra extended Graphics Array”. Graphic standard for PCs with a maximum resolution of 1,600 x 1,200 pixels. 


Vertical Frequency: Indicates how many images per second can be displayed (in Hz). 


WhisperMode: Economy setting of the lamp. The light output decreases but the lamp life increases. 


Wireless Lan (WLAN): Acknowledged standard for the wireless transmission of data between PCs or other electronic gadgets. According to the norm IEEE 802.11a up to 55 MBit per second of data can be transmitted. Currently no adequate replacement for cable transmittance since the transmittance is not made in real time. 


XGA: “Extended Graphics Array”. Graphic cards with a resolution of a maximum of 1,024 x 768 pixels. 


Yuv: Component signal 


Frequency Range: Indicates the frequency range (in Hz) which a signal needs for transmission. 


HDCP: High Bandwidth Digital Content Protection, a copy protection for the new digital interfaces DVI and HDMI. To ensure the seamless replay of video data via DVI (i.e. from the DVD) it is important that the copy protection HDCP is implemented in both connected devices. 


Horizontal Frequency: Indicates how many lines can be controlled per second (in kHz). 


IR Mouse Remote Control: The computer mouse can be controlled via the projector’s remote control.


Image Repetition Frequency: Indicates how many images per second can be displayed on the 

monitor (in Hz) (vertical frequency). 


Jack: Socket which is used primarily for video and audio signals.


Keystone correction: Ensures a parallel image even when projecting upwards. Some advanced projectors now offer a horizontal keystone correction which means that the projector does not necessarily have to be positioned at right angles to the screen.


LCD: “Liquid Crystal Display ”


Manual Zoom: The diagonal size of the image is adjusted manually at the lens.


Motorised Zoom: The diagonal size of the image can be adjusted via infrared remote control independent of of the projector’s location.


OSD: On-Screen Display is inserted into the projected image showing all current values such as source, brightness, contrast etc.


Pixel: “Picture Element”, smallest triggerable image part.


Progressive Scan continues scanning of video signal consisting of two semi-frames. Both semi-frames are put together to complete one frame. This allows the reproduction of fine structures. 


PSI: “Polysilicon” the material of the image elements of an LCD projector. The light transmission can be controlled by electronic signals.


RS 232: Interfaces provide LCD projector control via the PC or control utilities such as AMX or Creston.


Rear Projection: For reverse projection in transmitted light mode. Requires special rear projection screens.

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