6th Color Imaging Conference

Scottsdale, Ariz., Nov. 17, 1998

Color in Digital Video: DTV, ATV and High Definition Television

Color image coding for video involves classical colorimetry, but it also involves a set of engineering compromises and optimizations that lie outside that realm. This tutorial details how color is handled in digital video systems, from acquisition, through processing and recording, to display, in conventional 525-line and 625-line resolution, and in emerging high definition television (HDTV) systems.

The tutorial will explain the color separation mechanisms used in contemporary cameras, and discuss the ubiquitous CCD image sensor. Also discussed is the linear matrix processing that is used to improve the color performance of high-end cameras. Video signals are invariably subject to a nonlinear transfer function that mimics the lightness sensitivity of human vision. Though referred to by a pejorative term, "gamma correction," this nonlinear processing is quite essential to achieving good perceptual performance in a limited number of bits per component (say 8 or 10).

Benefits: Attendees of this tutorial will be able to:

Intended Audience: It is assumed that attendees are familiar with classical colorimetry, and will be comfortable with some integrals and dot products.

See also, Color in Desktop Computing: From Theory to Practice.

For registration details, see the Color Imaging Conference Tutorials page.

Charles Poynton - Courses & seminars
1998-07-17