H

Horizontal (as in "scan line")

HAAT

Height Above Average Terrain

HANC

Horizontal Ancillary Data

HD

Horizontal Drive

HD-MAC

High-Definition Multiplexed Ananlog Component

HDTV

High-Definition Television

Hi-8

An 8mm videotape format

HiPPI

High Performance Parallel Interface

HLS

Hue/Lightness/Saturation

HSI

Hue/Saturation/Intensity

HSV

Hue/Saturation/Value

HVS

Human Visual System