Circuit arrangement for processing color television signals

Abstract

A circuit arrangement for processing color television signals incorporated in a multi-mode type color TV receiver which is capable of receiving TV signals processed by different television systems such as NTSC and PAL systems. The circuit arrangement for processing color television signals comprises a first color demodulator for demodulating a composite color signal by a first color subcarrier having a first phase with respect to a first demodulation axis, a second color demodulator for demodulating said composite color signal by a second color subcarrier having a second phase with respect to a second demodulation axis, a matrix circuit for producing a color demodulation signal having a third phase with respect to a third demodulating axis by vector-synthesizing the color demodulation signals delivered from said first and second color demodulators; and means for generating a correction vector signal so as to correct said third phase of the color demodulation signal produced by said matrix circuit in such a manner that said correction vector signal is added to said color demodulation signal of the matrix circuit so as to shift said third phase of the color demodulation signal with respect to said third demodulation axis.