A state metric calculator for calculating state metrics of stages in a trellis of a sequence estimation technique is described. The floating point multiplier and the floating point adder are disposed between the crossbar operand multiplexor and the product-terms and summation buses, and are in parallel to each other. At least one color plane of the transformed image is upscaled, the one color plane corresponding to one of the color space dimensions of the second color space format, to provide the full color image in the second color space format.