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14
GLOS SA RY
14
1kHz
ADSL
AES
AES/EBU
AM
APT-X
ATRAC
Attenuation The reduction of a signal level. Attenuation is usually measured in dB.
B-Channel
Balance
Balanced
Audio
CAR
CAT 5
CD
Cleanfeed
Clipping
CMRR
CODEC
Codecs
Cross-talk
DA
DAB
92
Glossary
1000Hz or 1 kilohertz tone of 1kHz is often used for line-up and testing.
Asynchronous Digital Subscriber Link - a broadband delivery system over
standard telephone lines (between the exchange and the user).
Audio Engineering Society.
Professional digital audio standard covering frame format, connections
and interfaces. Interface is usually on XLR sockets and plugs.
Amplitude Modulation - older analogue modulation standard used on
long, medium and short wave.
Data reduction process for reducing the amount ofstorage or bit-rate
need for audio.
Adaptive Transform Acoustic Coding - the data reduction of compression
scheme used in Mini-disk machines.
Bearer Channel - the main carrier channels used in ISDN.
The relative levels of the left and right channels of a stereo signal.
A way of sending audio over cable that protects it from induced
interference.
See racks room.
Category 5 - type of cabling/connectivity standards used in
computer networking.
Compact Disc.
A cleanfeed is a signal produced by a telco module on a mixer which is
used as the output to be fed back to a caller on a telephone line.
The cleanfeed is a sum of all the other signals which constitute the
programme output, except for the caller's audio. A cleanfeed signal will
generally be of a better quality than a mix-minus signal.
The onset of severe distortion in the signal path, usually caused by the
peak signal voltage being limited.
Common Mode Rejection Ratio. This is the ratio of the extent to which a
differential amplifier will cancel noise, which is present on both inputs,
compared to its ability to amplify the signal.
COder-DECoder - used to change a signal from one format to another
and back again.
Using digital circuits being offered by telecom providers, usually ISDN
(Integrated Services Data Networks) or other data transfer methods,
audio can be transferred with good to excellent quality over what almost
amount to dial-up telephone lines. The units operate by Coding the
audio into a digital data stream that can be transferred over the digital
circuit which is Decoded at the receiving end (Thus CoDec).
By using single or multiple circuits, very high quality audio can be
transferred from one place to another, even internationally.
This is the amount of a signal from a bus which appears, or is induced,
on a different signal. The problem is usually most prevalent with
adjacent channels.
Distribution Amplifier.
Digital Audio Broadcasting = now called Digital Radio.
Redbox User Handbook No 3
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