Patent · US Expired

Video hue correction taking account of saturation and luminance

US5282021A · kind A · utility

9Cited by

2References

16Claims

0Family size

Assignee

BTS Broadcast Television Systems GmbH · DE

Inventors

Peter Bachmann · Ottobrunn, DE
Mike Christmann · Lierschied, DE
Dieter Poetsch · Ober-Ramstadt, DE

Key dates

Filing date	Feb 28, 1992
Grant date	Jan 25, 1994
Priority date	—
Expiry date	Feb 28, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/643
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A digital color television signal has its chrominance component, which is in the form of color difference signals, resolved into color hue and color saturation signals which are used to address a function memory which provides a pair of correction signals that are supplied to calculator circuits which respectively receive the color hue signal, the color saturation signal and the luminance signal as well as predetermined control signals previously stored which relate to the color sectors adjacent to the color sector in which the color hue signal is located. The calculation circuits respectively supply corrected color hue, color saturation and luminance signals. The color hue signal is additively corrected by a color hue correction signal and the color saturation signal is multiplicatively corrected by a saturation correction signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.