signals are prone to increase upon occurrence of any variation in the color temperature therefore the constants u03b1 u03b2 u03b3 in eqs 5 through 7 of the color matrix circuit 6 may be optimized in accordance with the color temperature variation hereinafter another embodiment of the present invention will be described with reference to fig1 which is a block diagram of an exemplary video camera signal processor according to the invention any components equal to those in the aforementioned embodiment of fig1 are denoted by the same reference numerals and a repeated explanation thereof is omitted an image sensor 120 in this embodiment incorporates a 1h delay circuit therein denoted by 121 is a color signal processor which is the same in constitution as the color signal processor 11 of fig9 excluding its 1h delay circuit i e as the portion on the right side of the broken line x y similarly the color signal processor 121 may have a constitution excluding the 1h delay circuit 3 from the aforementioned color signal processor 11 shown in fig1 now a description will be given with regard to the structure of the image sensor 120 illustrated in fig1 wherein a light receiving part 26 is structurally similar to the image sensor of fig2 the image sensor 120 includes in addition to the one shown in fig2 a 1h delay circuit comprising an input part 130 a transfer part 131 and an output part 132 the transfer part 131 operates synchronously with the horizontal transfer part 21 in response to a drive pulse generated from a drive circuit 9 the signal produced from the output part 22 of the image sensor is amplified by the amplifier 2 and then.