Arbitrarily variable digital nonlinear gain regulator for video signals

摘要

The present invention relates to a digital nonlinear gain adjuster for an arbitrarily variable image data storing means for storing a function value of a characteristic curve for each section and outputting a function value corresponding to an input signal, and A signal that selects the number of signal shifters that selects a function value for a start point and an end point of a section from the most significant bit by checking the first digit of the first bit, and makes the corresponding bit zero in the input signal. A signal generating means for generating a signal, an arithmetic means for multiplying a difference of two values outputted from said data storing means, and a number corresponding to 0, and a value outputted from said calculating means, outputting from said signal generating means; Division means for dividing according to the signal to be made, and the signal output from the division means And a signal completion means for outputting the result of the final partial linear approximation function by adding the signal outputted from the data storage means, and adjusting the gain of the video signal by using the partial linear approximation method having an exponential power of 2. By configuring a nonlinear gain adjuster with a variable characteristic curve, the gamma corrector with a freely transformable correction curve and auto-niy, fade in and fade out effects that do not reduce dynamic range can be processed as one device. A digital nonlinear gain regulator.