CMN-91
Appendix C
Installation and Operation Manual
Glossary
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 182
D-VITC Digital Vertical Interval Time Code. Timecode information stored on specific lines in the vertical
blanking interval of a television signal.
EAV End of Active Video in component digital systems.
EBU European Broadcasting Union
Editor A device or system which controls video tape recorders, video switchers, and other related
devices in order to electronically splice segments of recorded video into a finished production.
EDH Error Detection and Handling. A recommended practice defined in SMPTE RP 165. A system to
generate and then detect video data errors in serial digital video systems.
Effects Keyer A keyer which is electronically located in the mix/wipe generator portion of a switcher.
The resulting key would appear under the down stream key.
EIA Rack Space or Unit A specific size as designated by the Electronics Industry Association. The rack
unit is 19 inches wide, and is 1.75 inches tall. A device which requires 3 EIA rack units is 19 inches wide
and 5.25 inches (3×1.75 = 5.25) tall.
Elementary Stream (ES) A generic term for one of the coded video, audio or other variable length bit
streams which are packetized to form MPEG-2 transport streams. Consists of compressed data from a
single source (audio, video, data, and so forth). One elementary stream is carried in a sequence of PES
packets with one and only one stream ID.
Embedded Audio Digital audio information multiplexed onto a serial digital data stream. Up to sixteen
channels can be multiplexed on a single stream of 601 video, minimizing cabling and routing
requirement.
ENG Electronic News Gathering
Encoded Clip Softness In the encoded legalization process, "softness," as applied to encoded clips, refers
to the processing of the video at the point of the clip. The clips are applied in YCbCr color space. The clip
point is either an immediate limit (no softness) or will have a range of values leading to the clip point, all
reduced to smooth the clip point to a less immediate limit (softness).
Encoded Legalization Limiting of the luminance and color difference signals such that, once encoded
into a composite video signal, the resultant encoded video does not violate the maximum or minimum
signal levels as defined by the specific encoding rules. NTSC and PAL video plus various users of these
types of video have many varied rules for maximum and minimum encoding limits. Encoded legalization
usually calculates first the encoded luminance value and then the corresponding chroma value to make
legalization judgments.
Encoded Video A combined single video signal that is constructed from either separate RGB or
luminance and two color difference video signals. NTSC, PAL, and SECAM are all examples of encoded
video.
Envelope Detection An RF signal detection technique that does not respond to phase variations in the
carrier signal, enabling measurement of a transmitter’s incidental phase. When used together with
synchronous detection, envelope detection helps isolate either video and/or RF as the causes of phase
distortion.