Glossary - H

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HAD: Stands for Hole Accumulated Diode. This is a type of CCD sensor which has a layer designed to accumulate holes (electronically), to reduce noise levels.
HDD: Hard Disk Drive. A magnetic media for storing digital information on most computers and electronic equipment which process digital data.
HDDTV: High Definition Digital Television. The upcoming standard of broadcast television with extremely high resolution and aspect ratio of 16:9. It is an advancement from the analog high definition, already used experimentally in Japan and Europe. The picture resolution is nearly 2000 x 1000 pixels, and uses the MPEG-2 standard.
HDTV: High Definition Television. It usually refers to the analog version of the HDDTV.
Herringbone: Patterning caused by driving a colour modulated composite video signal(PAL or NTSC) into a monochrome monitor.
Hertz: A unit that measures the number of certain oscillations per second.
HS: Horizontal Sync
Hum Bug: Another name for a ground loop corrector.
Hum: A term used to describe an unwanted induction of mains frequency.
Hyper-HAD: An improved version of the CCD HAD technology, utilising on-chip micro lens technology to provide increased sensitivity without increasing the pixel size.

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