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AG-7.2.B1-092414 • Restricted - customer use only
1.4
Definitions and Acronyms
8VSB
8-level vestigial sideband modulation - used for ATSC over the air broadcast
AC3
Dolby Digital Audio Codec 3 - compression used by ATSC
AFD
Active Format Description - metadata describing format i.e. 4:3 or 16:9
ARL
As Run Logs - use customer extracted program schedules
ASI
Asynchronous Serial Interface - used to carry MPEG-TS
ATSC
Advanced Television System Committee – set of standards for US digital
television
Bookmark
Short program segments marked on the MIP server to facilitate auditing and
sharing
CALM Act
Commercial Advertisement Loudness Mitigation – FCC requirement for audio
loudness levels
CC/TT
Closed Captioning/ SMPTE Timed Text - Protocols used to add text description
of the audio
CDN
Content Delivery Network – distributed servers used to source programs as
close to the customer as possible.
CEM
Content Export Module – optional software package to export program clips to
social media sites.
Clear QAM
Clear Quadrature Amplitude Modulation – non encrypted Cable video
distribution
Component
Video
Analog video with separate Red, Green, Blue channels using three RCA
connectors
Composite
Video
Analog video over a single RCA connector
Cron
Time based job scheduler.
Dialnorm
AC3 metadata used to control playback gain
DPI
Digital Program Insertion – Metadata that allows downstream insertion of
commercial or short programs.
DVB
Digital Video Broadcasting - international suite of digital television standards