Glossary

0-9
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
GLOSSARY MAINPAGE

C

CABLE - Speaker cables consisting of either many copper strands (Multistrand) or a single larger strand (Solid Core). Some cables are designed to be directional, so look out for arrows on the cable casing. Also used to describe cable television services that use a fibre-optic cable to send transmissions from the relay station to the customer's receiver.  
CABLE TELEVISION - The transmission of television programmes through fibre optic cable to a suitable decoder near your TV.  
CAV - Active Play Laserdiscs with a Constant Angular Velocity. One of the two types of data storage found on Laserdisc. The speed of rotation of the Laserdisc remains constant while the data is read by the laser pickup. Also see CLV.  
CD - Compact Disc used for audio data storage. 12cm diameter discs with a silicon based coating is encoded with digital information in the form of microscopic pits and has a data storage capacity of 650 Megabytes.  
CD-R - Compact Discs that can be encoded with audio data by a suitable CD Recording deck. Each disc can only be recorded onto once and existing information cannot be erased. Recorded discs can only be player on CD players that can read CD-R discs.  
CD-RW - Recordable Compact Discs that can be erased and Re-Written. The discs use a different surface and laser assembly so recordings made on a CD-RW deck cannot be played on other CD players.  
CD-ROM - Compact Disc software used by Personal Computers. This is a Read Only media.  
CD-RAM - Compact Disc software used by Personal Computers onto which you can record data.  
CD-V - Video CD that contains video and audio information that can be decoded by a player with Video CD capability.  
CD-TEXT - A system that allows a small amount of text to be stored on the disc with normal audio information that can be read by a CD player with Text capability.  
CD-X - An audio CD containing additional eXtra multi-media information that can be read be a Personal Computer's CD-ROM drive.  
CLV - Long Play Laserdiscs with a Constant Linear Velocity. One of the two types of data storage used on Laserdisc. The data is stored on the surface of the disc as a narrow spiral track, similar to the groove on a vinyl record. The speed of the disc is variable so that the track passes the laser pickup at the same speed at any part of the disc. CLV allows longer playing times than Active Play CAV discs.  
COAXIAL - Electrical cable used to carry signals. They can be used as digital connections between hi-fi and home cinema audio equipment, and for connecting a roof-mounted antenna to a television or video recorder. Also see optical.  
COLORATION - Musical impurities that change the sound from the original recording. This is usually as a result of incorrect hardware settings that gives, for example, slow, boomy bass or squeaky treble. Ideally, music should pass through hardware using the shortest path and no tone controls. Cinema sound DSP modes adjust the sound signal to create the required effects, so colouration is less of a problem with surround sound.  
COMPOSITE VIDEO - A type of cable connection used for passing picture signals from one component to another. The sockets are usually coloured yellow, and a single standard phono lead is used.  
CROSSOVER - A circuit inside a speaker that directs low frequencies to the bass drivers and high frequencies to the mid-range and treble drivers.