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44 Appendix A: Glossary
Glossary
• Band
One of the surfaces of a buffer. A grayscale image requires just 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.
• CIF
Common Intermediate Format. A set of video formats used to standardize the
horizontal and vertical resolutions in pixels of YCbCr sequences in video signals.
• 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.
• D1
A digital video standard, used for storing uncompressed digitized component
video, digital audio, and a time code. D1 video resolution is 720 x 480 for NTSC
systems and 720 x 576 for PAL systems.
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