Hertz:
is a unit of measuring frequency. 1 Hertz = 1 cycle per second.

Homing sequential switcher:
is a type of switcher used for small systems. It has only one output.

Horizontal resolution:
is the number of vertical lines which can be resolved in a picture. It depends upon the number of pixels in a chip.

Horizontal shift register:
is a part of the CCD chip to which the charge from the pixels is transferred line by line. This charge is then converted into an analogue video signal.