The band or range of frequencies - often expressed in Hertz (Hz) for analogue devices and bits per second (bps) for digital ones - which can be transmitted through a communication system such as a computer or satellite network. Bandwidth is one measure of a system's information-carrying capacity: the wider the bandwidth, the more information that can be carried.
Broadband interactive system
Direct-from-home/office return channel via Ka-band up to 2 Mbit/s, and forward channel via Ku-band. ASTRA's broadband interactive system offers two-way asymmetric multimedia communication via satellite.
Bit Error Rate
Denotes the quality of a received demodulated digital signal. The lower the rate, the better the signal. Example: a BER of 10 -4 means one error in every 10,000 bits.
A system of numerical representation which uses only the digits 0 and 1.
The abbreviation for a binary digit.
This CD/DVD lookalike won the high-definition DVD format battle - HD DVD was the loser – and is named after the colour of the laser needed to read the discs. Single layer Blu-ray discs can store up to 25GB of information (dual layer up to 50GB), which makes them ideal for HD films and programming.