Gamma correction circuit

A gamma correction circuit for correcting a digital video signal, the circuit comprising first ( 6 ) and second ( 8 ) lookup tables for storing discrete output intensity data and the associated slope data of a non-linear transfer function, respectively, for each of the discrete input video signal intensities, an adder ( 10 ) having a first input connected to the output of the first lookup table, a multiplier ( 12 ) having a first input connected to the output of the second look-up table ( 8 ), characterized by a quantizer ( 4 ) for providing the most significant bits of the incoming video signal to address the first ( 6 ) and second ( 8 ) lookup tables and to transfer the corresponding output intensity data to the adder ( 10 ) and the associated slope data to the multiplier ( 12 ), the quantizer ( 4 ) transmitting the remaining least significant bits of the input video signal to the second input of the multiplier ( 12 ), the multiplier ( 12 ) multiplying the slope data with the remaining least significant bits and feeding the multiplication result to the second input of the adder ( 10 ), the adder ( 10 ) adding the output intensity data and the multiplication result to generate a corrected video signal.