Abstract: A YUV-RGB digital conversion circuit which can be reduced in circuit scale. The YV-R conversion circuit in the YUV-RGB conversion circuit which converts digital luminance signal (Y) and digital color difference signals (U and V) into digital chrominance signals (R, G, and B) computes the R signal by approximately developing the coefficient 1.371 in the expression of R=Y+(V−128)×1.371 in terms of a finite number, 2−n (n: a natural number). The YV-R conversion circuit is provided with a plurality of bit shift circuits (42, 46, 50, 52 and 56) which output the products of input signals and 2−k (k: a natural number of ≦n) by bit-shifting the input signals. A plurality of adders (44, 48, 54, 58, 60, and 62) which perform addition on terms of two sets of products of the input signals and 2−k (k: a multiplier), with the (k) having different values.