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Amethyst III DTV Smart Switch 295
User Manual
Glossary
100/1000Base-T
An Ethernet standard designed to generate, monitor and capture 100/1000
Ethernet traffic.
3G-SDI 3 Gbps High-Definition Serial Digital Interface.
4:2:2 A chrominance sub-sampling system in which the color difference signals
are sampled on all lines at half the luminance rate.
AES
Audio Engineering Society.
Professional organization of electrical engineers whose concern is with the
standards of audio engineering.
ARP Address Resolution Protocol.
Internet protocol used to map an IP address to physical (hardware)
addresses on local area networks.
ASI Asynchronous Serial Interface.
BAT
Bouquet Association Table
The BAT provides information about bouquets. It gives the name of the
bouquet and a list of associated services.
Buffer A memory store used to provide a consistent rate of data flow.
BW Bandwidth: a measure of the width of a range of frequencies, measured in
hertz.
CAT
Conditional Access Table
CAT table is used for conditional access to the streams. It provides
association with EMM stream.
CBR Constant Bitrate. The bit-rate of the bitstream is constant.
Chrominance Chrominance (chroma or C for short) is the signal used in video systems
to convey the color information of the picture, separately from the
accompanying luma signal (or Y for short).
Codec Compressor-Decompressor.
A codec is a device or computer program capable of encoding and/or
decoding a digital data stream or signal.
Compression The process of removing redundant data from audio or video streams to
reduce the amount of data transferred or stored.
CPU Central Processing Unit.
CRC Cyclic Redundancy Check.
A cyclic redundancy check (CRC) is an error-detecting code designed to
detect accidental changes to raw computer data, and is commonly used in
digital networks and storage devices such as hard disk drives.