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Feeling a little bit lost with all these technical terms? Don't worry, the answers you are searching for are just a click away. Navigate through the Crown Security Products glossary page to find a clear explanation of the definition. If you can not find what you are looking for or if you would like any further explanation, please let us know by using the contact form. It would be our pleasure to assist you further.


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9


AVI (Audio Video Interleaved): An AVI is a sound and motion picture file introduced by Microsoft. AVI files (which end with an .avi extension) require a special player to be read, such as Windows Media Player.


BNC (British Naval Connector): A type of connector used on most professional video equipment (with coaxial cables) providing a secure twist-lock capability.


CCD (Charge Coupled Device): A CCD is one type of digital camera chip that records illumination intensity.

CCTV (Closed-Circuit TeleVision): The use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

CMOS (Complementary Metal Oxide Semiconductor): CMOS is a type of image sensor that functions like a CCD while using less power and creating less heat.


DVR (Digital Video Recorder): CA device that records video and stores it onto a hard disk in digital format, eliminating the need for video cassette tapes.


FPS (Frame Per Second): The speed at which still images (frames) in a video or animation are played in succession by an imaging device.


H.264 Technology: H.264 aslo known as MPEG-4 AVC is a standard for video compression format. H.264 is part of both the Blu-Ray and HD-DVD specifications.

HDD (Hard Drive Disk): A HDD is a storage device that stores data on magnetic surfaces that rotate at rapid speeds.


IR (Infra-Red): Low frequency light below the visible spectrum. This is often used for covert surveillance to provide a light source for cameras to record images in dark or zero light conditions.

IP Camera: CCTV cameras that use Internet Protocol to transmit image data and control signals over a Fast Ethernet link. IP cameras are also commonly referred to as network cameras.


M-JPEG (Motion-Joint Photographic Experts Group): M-JPEG is a video format where each video frame is separately compressed as a JPEG image. Basically, a combination of JPEG pictures in a movie.

MP3: A file format used for compressing audio data.


Pan&Tilt Control: A device that can be remotely controlled to provide both vertical and horizontal movement for a camera.


QVGA (Quarter Video Graphics Array): QVGA is a popular term for a computer display with 320 × 240 display resolution.


Remote Connection: Remote Connection is a technology that allows you to sit at a computer or any device with Internet and connect to a remote device (i.e. Connect to your home camera from your office PC).

RFID (Radio Frequency Identification): RFID is the use of an object, typically referred to as an RFID tag (i.e. proximity card) for the purpose of identification and tracking using radio waves.


SD (Secure Digital) Card: A type of flash memory card for data storage devices commonly used in digital cameras, phones and other mobile devices. An SD card is very small, only measures 1.3" x 0.9" x 0.08".


TF Card (TransFlash):TF Card is another name for a Micro SD (Secure Digital) card which is a format for removable flash memory cards. The name TF card is barely used nowadays and has been replaced by Micro SD.

TFT (Thin-Film Transistor): LCD technology where each pixel has its own transistor switch. This results in sharper looking colors.


VGA (Video Graphics Array): VGA is a standard video graphics adapter that supports resolution of 640 x 480 and a 256-color palette;