Color signal matrix circuits

Details Color signal matrix circuits Color signal matrix circuits

H - Electricity

04

N

350/44

H04N 9/67 (2006.01)

Patent

CA 1310404

ABSTRACT OF THE DISCLOSURE A color signal matrix circuit for producing first and second color difference signals from three primary color signals employs a reduced number of digital circuit elements and includes a first subtractor for producing a first color subtraction signal based on red and green primary color signals, a second subtractor for producing a second color subtraction signal based on blue and green primary color signals, a first level adjuster receiving the first color subtraction signal, a second level adjuster with a variable level factor receiving the second color subtraction signal, a third subtractor receiving the first color subtraction signal from the first level adjuster and the second color subtraction signal from the second level adjuster for producing the first color difference signal' and a third level adjuster receiving the second color subtraction signal, a fourth level adjuster with a variable level factor receiving the first color subtraction signal, and a fourth subtractor supplied with the second color subtraction signal from the third level adjuster and the first color subtraction signal from the fourth level adjuster for producing the second color difference signal.

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