FIELD: data processing.SUBSTANCE: invention relates to techniques for processing an image signal comprising high dynamic range pixel values. Disclosed is an image signal generating device, in which pixels are encoded in N-bit words which encode at least a luma per pixel. Device comprises a receiver, first and second generators. Receiver receives high dynamic range pixel values in accordance with a first colour representation in M-bit words. First generator includes high dynamic range pixel values in said image signal in N-bit words according to second colour representation.EFFECT: high efficiency of encoding an image signal due to combined encoding in signal of an HDR type indicator.19 cl, 7 dwg
HIGH DYNAMIC RANGE IMAGE SIGNAL GENERATION AND PROCESSING