Glossary
Numerics A B C D E F G H I J L M N O P
Q R S T U V W Y
© 2011 Harmonic Inc. 196 ProView 7000 v.2.4, Rev. A
AHC
Audio adapter used in the Electra/Ion family of encoders. Can compress up to three stereo pairs
of digital audio into either MPEG-1 layer II, MPEG-2/MPEG-4 AAC/HE AAC, or Dolby
Digital (AC-3) formats. The AHC has 3 variants: AHC-RAC, AHC-561, and the “On-board”
adapter, which is simply an AHC-RAC without external connectors (which means it can only
encode embedded audio).
AHC-561
Audio adapter used in the Electra/Ion family of encoders which hosts a Dolby Cat. 561
compression module. The Cat. 561 can transcode Dolby E to either Dolby Digital (AC-3) or
Dolby Digital Plus (E-AC-3, see
AHC) or Dolby Digital to Dolby Digital Plus.
AHC-RAC
Audio adapter used in the Electra/Ion family of encoders. Can compress a multi-channel audio
sound field (from either AES3 or embedded digital inputs, see
AHC) into either Dolby Digital
(AC-3), Dolby Digital Plus (E-AC-3), or MPEG-2/MPEG-4 AAC or HE AAC. Alternatively it
can compress three unrelated stereo pairs of digital audio into either MPEG-1 layer II, MPEG-2/
MPEG-4 AAC/HE AAC/HE AAC v2, or Dolby Digital (AC-3).
AIC
Audio adapter used in the Electra/Ion family of encoders. Can compress two stereo pairs of
either analog or digital audio into either MPEG-1 layer II, MPEG-2/MPEG-4 AAC/HE AAC, or
Dolby Digital (AC-3) formats.
AIM
A card for the MN20 multiplex. Provides a DVB-ASI interface for the MN20 remultiplex. It
accepts up to four MPEG-2 Transport Streams in the DVB-ASI electrical interface format (270
mbps).
Alarm Indicator
Displayed in the title bar of each web client page of the device. It appears in red when an alarm is
issued and notifies of a fault and of its nature.
Any to Any Routing
Allows you to define a network group for connecting services from different input and output
devices in associated encoding and multiplexing network groups.
AOM
A card for the MN20 multiplex. The AOM transmits MPEG-2 transport stream packets over a
155 MB/sec interface (either STS-3c/OC-3 or STM-1). The transport stream packets are first
encapsulated into ATM Adaptation Layer 5 (AAL-5) PDUs then segmented into ATM cells. The
cells undergo ATM constant bit rate traffic shaping before egress to assure that the appropriate
quality of service is maintained. The AOM is an output option for the MN20 remultiplex.
API
Application Programming Interface. A term applied to software libraries, functions, and tools for
building software applications.
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