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A
Acetate: Type of transparency used on overhead projectors.
ANSI Lumens: A standard for measuring light output, used for comparing projectors.
Aspect Ratios explained: The relative horizontal and vertical sizes. For example, if a graphic has an aspect ratio of 2:1, it means that the width is twice as large as the height. When resizing graphics, it is important to maintain the aspect ratio to avoid stretching the graphic out of proportion. The term is also used to describe the dimensions of a display resolution. For example, a resolution of 800x600 has an aspect ratio of 4:3.
720p: The term 720p refers to 720 lines of progressive video (720 lines per frame). Higher resolution than standard DVD, which is 480i or 480p. Usually refers to 1280x720 resolution in 1.78 aspect ratio.
1080p: Short for 1080 progressive, where 1080 represents 1,080 vertical pixels by 1920 horizontal pixels. 1080p is the highest of high-definition signals and uses progressive scanning
720i and 1080i: Refers to “interlaced” video. Not as high a resolution as 720p or 1080p
B
Barrier Ropes: Red barrier ropes with chrome stanchions used for crowd control.
Beamer: This is a term used for an LCD or Data Projector.
Blackout: This is usually a curtain, used to blackout natural light in a room, improves quality of images being projected.
C
Camcorder: Used for filming, usually supplied with a tripod.
Carousel: Sits on top of 35mm Projectors to put slides in.
C.C.T.V.: Closed circuit television system used for surveillance / security. See also Role Play System.
Combi Unit: Combined Television & DVD Unit or a Combined Television & VHS Video Unit..
Conference Telephone: Starfish shaped unit which is placed in the middle of a table to enable multiple participants to have conversation with caller.
Cue light: Prompt light for people giving speeches.
D
DAT Machine: Digital Audio recording on to tape.
Delegate Units: Press to speak personal microphone and speaker.
D.I. Box: Direct Injection Box, a box which interfaces with various equipment into a PA System.
Digital Camera: Takes digital images that can be downloaded and edited via computer.
Drape Kit: Full or part to surround large projection screens to enhance aesthetic appearance.
E
Edit Monitors: Small units for previewing picture and sound prior to presentation.
Electronic Whiteboard: Generates a printout of what ever is written on it
F
Fast-Fold Screen: Larger type of presentation screen.
Flipchart Easel: Can be used with or without paper for writing on during presentations.
G
Gaffer: Tape used for temporary securing of cables which conforms to Health and Safety requirements.
Gyro Mouse: Wireless remote controlled mouse for use with computer presentations.
H
Headset Microphone: Cordless radio microphones worn on the head.
I
Inductance Loop: A cable system round a room to enable people with hearing aids to pick up sound from the audio outputs.
Infra-red Remote: The traditional remote control, it transmits infra-red similar to a television remote. Typical range is limited to 30-35ft. Infra-red requires line of sight or a bounce off a hard surface.
ISDN: Is a specific telephone line required for video conferencing and fast internet access.
K
Kilowatt: Often referred to as ‘K’, meaning 1,000 watts of audio sound level.
L
Lapel Microphone: Term used for a wireless microphone worn on a tie or lapel of clothing.
Laptop: Portable computer which is commonly used with an LCD projector for powerpoint presentations.
Laser Pointer: A small pen or cigar sized pointer that contains a small battery powered laser which can project a small high intensity beam of light (typically red), that is immediately very visible on the screen. Excellent for pointing to objects or text to make a point.
LCD Projector: Term used for data projector.
LCD Television:/Monitor: Liquid Crystal Display, The image on an LCD screen is created by sandwiching an electrically reactive substance between 2 electrodes.
LED Television/Monitor: Light-emitting diode, a semi conductor diode that glows when a voltage is applied.
Lectern: A piece of furniture for a speaker to stand behind and rest either their notes or laptops on.
M
Minidisk Recorder: Form of digital audio recording, playback onto disk.
Mixer: Audio equipment for combining multiple signals.
MON/VID/STD: Monitor and video on a portable wheeled stand.
Multiplay CD: Can hold and play multiple compact discs for continuous music.
Multicore Cable: A thick cable with several audio cables running through it,
N
NTSC: The United States broadcast standard for video and broadcasting. An older standard and lower resolution than systems used in most of the world.
O
Overhead Projector (OHP): A device consisting of a light source, a transmissive or reflective platform, and a focusable lens assembly. An OHP is designed to project images from transparencies onto a screen.
P
PAL: A European and international broadcast standard for video and broadcasting. Higher resolution than NTSC.
Par Cans: A parabolic aluminized reflector lamp, also known as Pars. Varieties include PAR 6 (1000w bulb) , PAR 4 (350-750w bulb) & LED.
PA System: Public Address System, which amplifies sound.
Plasma Screen: A flat multi-purpose screen (3” deep) used for displaying computer and video images.
Podium: Term used for small stage.
R
Radio Microphone: Wireless microphone which can be either hand-held, lapel (tie) clip or headset.
Rear Screen Projection: Using an opaque screen, the projector is placed behind the screen invisible to the audience. It projects onto the screen and the audience sees it on the other side.
Redhead: Light used in video filming and photography to give colour corrected output.
Role Play system: Camcorder, monitor and video used to record and playback role plays for instructional educational purposes.
S
Secam: A French and international broadcast standard for video and broadcasting. Higher resolution than NTSC.
Simultaneous Translation: Cordless headsets are provided for delegates so that an interpreter, (usually located in a separate booth), can translate a speech.
Slide Projector: A term used for 35mm projectors, used to show photographic slides.
Smart Board: An interactive projection display board used in classrooms and meeting rooms.
Smartfade (Seamless or Matrix Switchers): Device for combining multiple video and computer signals to a single or multiple output.
Speakerphone: Normal desktop telephone with speaker and microphone to enable caller to speak to more than 1 person simultaneously.
Stage: Raised platform.
SVGA: Is a computer or display screen resolution of 800 x 600 pixels.
T
TFT Screen: Thin Film Transistor Screen, are much flatter than traditional monitor screens.
Tie-clip: see Lapel Microphone.
Tribune Table: Top table used by speakers, chairpersons etc.
U
Uplighters: Provide subtle background lighting for events.
V
VGA: Is a computer or display screen resolution of 640 x 480 pixels.
W
Whiteboard: Used for writing on during presentations, can be magnetic on one side.
X
XGA: Is a computer or display screen resolution of 1024 x 768 pixels.
If there are any other AV terms you are unsure of then please feel free to email us or call us with your query.
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