Method and apparatus utilizing look-up tables for color graphics

Details Method and apparatus utilizing look-up tables for color graphics Method and apparatus utilizing look-up tables for color graphics

1991-04-01

1995-03-28

Powell, Mark R.

Television

Image signal processing circuitry specific to television

Hue control

348654, 345199, H04N 974

Patent

active

054021812

ABSTRACT:
In a composite video system having a digitized composite video signal to be modified, wherein the digitized video signal has discrete values having sampling frequency Nf.sub.s where N is an integer greater than one, and f.sub.s is the color subcarrier frequency of the video input signal, a method and apparatus for utilizing look-up tables to create special color effects without decoding to luminance and chrominance, the method having the steps of storing in memory N sets of predetermined values such that the sets are addressable in a desired predetermined order and such that the predetermined values relate to a discrete equal distant points on a color subcarrier frequency wave corresponding to a desired color, retrieving from memory the stored values at a rate Nf.sub.s such that the N sets are addressed in the predetermined order, and using the digitized composite video signal to address said memory, to produce a digitized video output signal with different values, as desired.

REFERENCES:
patent: 4763186 (1988-08-01), Belmares-Sarabia et al.
patent: 4799053 (1989-01-01), Van Aken et al.
patent: 4951126 (1990-08-01), Ohta
patent: 5040128 (1991-08-01), Yamaguchi
patent: 5042078 (1991-08-01), Oshikoshi et al.
patent: 5065230 (1991-11-01), Kumano et al.

Affiliated with

Also associated with

Rating

Method and apparatus utilizing look-up tables for color graphics does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus utilizing look-up tables for color graphics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus utilizing look-up tables for color graphics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2254318