Glossary

Data Projector: A projector that can be used to project both video signals as well as computer signals.
Seamless switcher: A unit designed to switch between video and computer sources is a visually smooth way as opposed to “crashing” between sources which can be distracting.
Aspect ratio: The relationship of the horizontal dimension to the vertical dimension of an image. In viewing screens, standard TV is 4:3, or 1.33:1; HDTV is 16:9, or 1.78:1. Sometimes the ":1" is implicit, making TV = 1.33 and HDTV = 1.78.
Front or rear Project: The terms front and rear projection refers to where the projector is placed in relation to the screen and audience. In front projection set ups the project is on the same side of the screen as the audience and is usually flown from the ceiling or on a tower at the back of the room. In rear projection the projector sits behind the screen usually on a projection stand, the advantage of rear projection is that it is tidy and allows the presenter to walk in front of the screen without casting shadows, but it does take up more of your room, general rule of thumb is you will lose 1.5 times your screen width. i.e using a 10ft screen you will lose 15ft of your room.
Lumen(s): The unit of measure for light coming out of a light source, such as a projector. The higher the number the brighter the image. Whilst lumens are important, contrast ratio, resolution and colour reproduction accuracy all combine to produce the best picture.
Montage: A image mixing system developed by Vista systems that allows great flexibility in how your screens and content is design to create stunning events
RGB: Red, Green, and Blue. The colour information in a video signal. The basic components of the colour television system. They are also the primary colours of light in the additive colour process. The term RGB(HV) is generally used when describing the type of signal and cable used to join to pieces of equipment together.
PIP: Picture-in-Picture. A small picture within a larger picture created by scaling down one of the images to make it smaller. Each picture requires a separate video source such as a camera, VCR, or computer.
PowerPoint: PowerPoint is a Microsoft software package design to allow professional presentation to be made simply and easily. It is important to note there are several versions with the major differences existing between PowerPoint20003 and PowerPoint 2007. Presentations in 2003 will play well in 2007 but may substitute some effects. Presentations made in 2007 will not play in 2003 unless you have saved it in a compatible format.
Keynote: Keynote is an apple based presentation package designed to allow you to create presentations from the clean and simple to the complex and stunning.
Phase: The term 3 phase power refers to an “industrial” power supply. When the normal power sockets we use daily are not big enough to power the equipment for your event the technical team will use a 3 phase power supply, most venues have these and it just requires the use of bigger cables and distribution systems. 3 phase can come in many ratings but generally, 32 & 63 amp are available in venues and suitable for corporate events.
GOBO: In basic terms a gobo is either a thin piece of stainless steel or alternatively vapour deposited metal on glass which has had an image cut into it. When placed into a light it projects the cut-out image onto any surface magnifying the image. Gobo's are used extensively in the entertainment lighting industry, advertising, trade shows etc.
PSTN & ISDN: These are both terms used to describe telephone connections/services. PSTN (Public switched telephone network) is the normal telephone line we are used to in our homes and offices and is used to make standard voice calls. ISDN (integrated services digital network) is used when high levels of data are required and is commonly used for videoconferencing.
Video -conferencing: Videoconferencing uses telecommunications of audio and video to bring people at different sites together for a meeting. This can be as simple as a conversation between two people in private offices (point-to-point) or involve several sites (multi-point) with more than one person in large rooms at different sites. Besides the audio and visual transmission of meeting activities, videoconferencing can be used to share documents, computer-displayed information, and whiteboards. Videoconferencing requires either ISDN lines or a very fast internet connection and specialist knowledge. Videoconferencing is very useful for real-time interaction between or more sites.
Webcasting: Webcasting makes use of the worldwide web to display information to multiple sites at one time, essentially webcasting is broadcasting over the internet. Commonly webcasts display slides and audio in a custom webpage, or if bandwidth allows Slides and video. The live programs can then be achieved and watched on demand at a later time. Webcasting is a very cost efficient way of broadcasting a message to large volumes of people of large areas. Webcasting is not real-time and therefore two way conversations are not possible although the use of text based questions for the audience is very common.














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