Home' RTCA Documents for Review : DO-230H FRAC Contents Appendix B
©2017 RTCA, Inc.
Digital Recording – A digital recorder technology used in cameras that allows clearer images and quicker
access to their storage on a hard drive than occurs with video tape and faster access to them.
Digital Signal Processing (DSP) – Conversion of the analog signal from a CCD image sensor into a digital
signal through an analog to digital converter. This enables many digital features such as backlight
compensation or sensitivity up.
Digital video – To store and manipulate analog video on a computer workstation, it must be converted to
digital video via a video signal made of binary digits.
Distributed Intelligent Devices – Access control devices as provide access decisions and uploading event
messages periodically to the central processing unit for storage.
Distribution Amplifier (DA) – An electronic distribution ‘amp’ is a device that accepts a single input
signal and provides this same signal to multiple isolated outputs allowing a signal to be distributed to
multiple destinations without ground loops or signal degradation.
Dual-Interface Cards – Contain a single integrated circuit that can communicate with a smart card reader
terminal via contact or contactless port.
DVR – Digital Video Recorder, a device for capturing video streams from cameras, encoding the video
into a digital format, and writing the video to a disk drive or other media. DVRs are available in various
sizes but typically support 16 cameras.
DWDM – Dense Wavelength Division Multiplexing of optical signals over fiber cable.
EAN – European Article Numbering System symbols have 12 digits and one overhead digit and use the
first two characters to designate the country of the EAN International organization issuing the number.
(UPC is in fact a subset of the more general EAN code).
EBTS – Electronic Biometric Transmission Specification, an FBI biometric application profile standard
EER – Equal Error Rate
EIA – Electronic Industries Alliance, a US standards body, ceased operation in 2011 but many of its
standards are still valid.
Encryption – The process of scrambling files or programs, changing one-character string to another
through an algorithm (such as the DES algorithm).
Encryption Key Types – The process of encoding messages (or information) via symmetric (private
sector), asymmetric (public sector) or a hybrid (symmetric / asymmetric) algorithms to provide authorized
parties (via a secret decryption algorithm or key) the ability to access the messages while denying
Encryption Standards – AES (Advanced Encryption Standard); DES (Data Encryption Standard); 3DES
(Triple DES encryption technology); TDEA (Triple Data Encryption Algorithm Block Cipher).
EOC – Emergency Operations Center
EPC – Electronic Bar Code is a code electronically recorded on an RFID tag intended to be an improvement
on the UPC barcode system.
ERO – The European Radio-communications Office (ERO) (1991) based in Copenhagen is the permanent
office supporting the Electronic Communications Committee (ECC) and European Telecommunications
Office (ETO) of the CEPT.
ETSI – European Telecommunications Standards Institute
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