A display management unit for producing a modified video signal for display on a target display, the display management unit comprising: at least one video input (12, 22A) connected to receive at least one input video signal; an ambient input connected to receive information characterizing ambient conditions at the target display; a metadata input connected to receive metadata characterizing one or more aspects of a creative intent for video content carried by the at least one input video signal; a control input connected to receive control information; and a display input connected to receive information regarding the display capabilities of the target display; a control block operative to select choosing a mapping function from a plurality of mapping functions, each mapping function being a function of the at least one video input and one or more parameters, wherein: the control block is configured to select the mapping function based at least on the metadata; the control block is configured to determine the one or more parameters based at least in part on one or more of the information characterizing ambient conditions, the control information, and the information regarding the target display; and a translation block for receiving the at least one input video signal and the one or more parameters and producing the modified video signal based at least in part on an output of the mapping function; and an output for outputting the modified video signal. at least one video input (12, 22A) connected to receive at least one input video signal; an ambient input connected to receive information characterizing ambient conditions at the target display; a metadata input connected to receive metadata characterizing one or more aspects of a creative intent for video content carried by the at least one input video signal; a control input connected to receive control information; and a display input connected to receive information regarding the display capabilities of the target display; a control block operative to select choosing a mapping function from a plurality of mapping functions, each mapping function being a function of the at least one video input and one or more parameters, wherein: the control block is configured to select the mapping function based at least on the metadata; the control block is configured to determine the one or more parameters based at least in part on one or more of the information characterizing ambient conditions, the control information, and the information regarding the target display; and a translation block for receiving the at least one input video signal and the one or more parameters and producing the modified video signal based at least in part on an output of the mapping function; and the control block is configured to select the mapping function based at least on the metadata; the control block is configured to determine the one or more parameters based at least in part on one or more of the information characterizing ambient conditions, the control information, and the information regarding the target display; and a translation block for receiving the at least one input video signal and the one or more parameters and producing the modified video signal based at least in part on an output of the mapping function; and an output for outputting the modified video signal.