Patent ID: 6911977

Claim:
A method of restoring a light signal from digital data defining at least one colorimetric coordinate of the light signal in a particular colorimetric system, each colorimetric coordinate being encoded over a given number N of data bits and corresponding to a brightness value associated with a particular component of the light signal in the colorimetric system, the method comprising the steps of: a) processing said data bits so as to generate a first light signal, by means of a first light restoration unit which can produce brightness values in a first set of discrete values covering a first dynamic brightness range; b) processing said data bits so as to generate at least a second light signal, by means of a second light restoration unit which can produce brightness values in a second set of discrete values covering a second dynamic brightness range, less than said first dynamic brightness range, the second light restoration unit having a brightness resolution which is finer than the first light restoration unit; c) generating a third light signal obtained by superimposing said first and second light signals.