Aurora Multimedia V-Tune Pro VPH-100, Руководство пользователя

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APPENDIX 6 Glossary
AC-3 Audio Code 3
– A Dolby digital audio encoding scheme. The audio encoding format adopted by the ATSC.
ATSC Advanced Television Systems Committee
BER Bit Error Rate - The number of erroneous bits divided by the total number of bits over a stipulated period of
time. Usually expressed as a number and a power of 10.
Bit An indivisible unit of digital data represented as 1 or 0.
bps Bits per second
Broadcast A service that is delivered to all subscribers. Each subscriber may select a particular broadcast channel
out of many.
Byte An octet of associated bits
Cable Cable Television Systems
Carrier An RF signal used to carry information (video, audio, data) by some modulation scheme.
Coax Coaxial Cable
Composite video A baseband representation of a video signal containing luminance and chrominance information.
C/N Carrier to Noise Ratio
dB Decibel - A logarithmic value of a ratio
dBc Decibels relative to carrier amplitude
dBm Decibels relative to one milliwatt
dBmV Decibels relative to one millivolt across a given impedance (75 ohms in North American cable systems)
DTV Digital Television
– A general term for the digital coding and transmission of an Audio / Video Program.
EIA Electronic Industries Alliance
ES Elementary Stream
– A generic term for a stream of data of one particular type. Typically these streams are of
Video or Audio Types.
FCC Federal Communications Commission.
Headend The control center of a cable television system, where incoming signals are amplified, converted,
processed, and combined into a common cable, along with any locally originated programming, for transmission to
subscribers.
HRC Harmonically Related Carrier
IF Intermediate Frequency. A signal processing stage between RF and baseband.
IP The network layer (layer 3) of the OSI Internet protocol, providing connectionless datagram service.
IRC Incrementally Related Carrier
kbps Kilobits per second- bits per second in thousands
kHz Kilohertz - Cycles per second, in thousands
Mbps Megabits per second- bits per second in Millions
MHz Megahertz - Cycles per second, in Millions
MPEG Moving Picture Experts Group - An international standards-setting group, working to develop standards for
compressed full-motion video, audio, and other associated information.
MPEG-2 Refers to multiple parts of the ISO/IEC 13818 standard
mV Millivolt - Thousandths of a Volt
Noise An undesired or unintended element of a signal.
NTSC National Television Systems Committee
– Refers to the Analog Color Television Standard as used in North