Patent ID: 6515714
Filing Date: 2003-02-04
Classification: H04N

Abstract:
A hue adjustment circuit for implementing hue adjustment of a color difference signal by arithmetic operations on hue correction components obtained from a sub-carrier signal, a color difference signal, and a chroma signal in a television set, the hue adjustment circuit comprising:a switch included in a chroma signal processing circuit for selecting (i) output of a first 90Â° phase shift circuit shifting the sub-carrier in phase by 90Â° and (ii) a chroma signal; a first multiplier circuit for multiplying a signal selected by said switch by a signal supplied from a TINT phase shift circuit in the chroma signal processing circuit of the television set; and a second multiplier circuit for multiplying the signal selected by said switch by a signal supplied from a second 90Â° phase shift circuit shifting an output of said TINT phase shift circuit by 90Â°, wherein the hue correction components are derived from outputs of said first multiplier circuit and said second multiplier circuit.