194 Appendix E: Glossary
■ ASIC
Application-specific integrated circuit. An integrated circuit
custom-made to meet the requirements of a specific
application. It integrates several digital and/or analog
functions into a single die. This results in a reduction in cost,
board area, and power consumption, while improving
performance when compared to an equivalent
implementation using off-the-shelf components.
■ Band
One of the surfaces of a buffer. A grayscale image requires
one band. A color image requires three bands, one for each
color component.
■ Bandwidth
A term describing the capacity to transfer data. Greater
bandwidth is needed to sustain a higher transfer rate.
Greater bandwidth can be achieved, for example, by using a
wider bus.
■ Bus
A pathway along which signals are sent, generally in two
directions, for communication of data.
■ Color component
One of the components that make up a color space. Typically,
each component of a color image is stored in a separate band
of a multi-band buffer.
■ Color space
A color space is a way of representing and describing the
complete range of perceived colors. A number of color spaces
have been developed. Common color spaces are RGB and
HSL. Both describe the same range of perceivable colors.
■ Composite sync
A synchronization signal made up of two components: one
horizontal and one vertical.
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