ACO6800+ Installation and Operation Manual 115
Copyright © 2009, Harris Corporation
Appendix A
Glossary
Glossary of Terms
Advanced Television Systems Committee (ATSC): The parent organization
that developed, tested, and described the form and function of the US digital
television formats.
Asynchronous Serial Interface (ASI): A transmission method adopted by the
DVB, and called DVB-ASI. The transmission method allows for the transport
of varying data payloads in a constant data stream. The DVB-ASI transport
stream rate is 270 Mb/s.
Bandwidth: The range of frequencies used to transmit information such as
picture and sound.
(BAT) See
Bouquet Association Table
Bouquet Association Table (BAT): Provides a grouping of services which
serves as one basis on which a receiver presents the available services to a user.
Cable Virtual Channel Table (CVCT): Defines the virtual channel structure
for the collection of MPEG-2 programs embedded in the Transport Stream in
which the CVCT is carried.
Conditional Access (CA): An encryption/decryption management method
(security system) where the broadcaster controls the subscriber's access to
digital and Interactive TV services.
Conditional Access Table (CAT): Contains CA descriptors which identify PID
values for CA data.
Cyclic Redundancy Check (CRC): An error checking method to ensure all
bits of a transmitted signal are received.
Digital Video Broadcasting (DVB): A specific project office of the European
Broadcast Union. This group has produced a set of digital broadcasting
standards.
DVB: See Digital Video Broadcasting.
Elementary Stream (ES): A generic term for one of the coded video, audio or
other variable length bit streams that are packetized to form MPEG-2 transport
streams. Consists of compressed data from a single source (audio, video, data,
etc.). One elementary stream is carried in a sequence of PES packets with one
and only one stream ID.
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