Selective efficiency videofrequency non-linearity correction device

DETAILED DESCRIPTION The invention provides a selective efficiency video frequency nonlinearity correction device, for the precorrection of nonlinearity introduced into the video frequency signal in the high frequency stages of television equipment.
The invention comprises a video frequency signal input connected to the input of a dispatcher having at least two outputs connected respectively to the input of a wide band channel and to the input of a low frequency correction channel, this correction channel comprising a low pass filter whose output is coupled to at least one threshold corrector circuit comprising means for selecting the level ranges to be corrected and associated amplitude adjustment means, the output of the corrector circuit being coupled to the output of the low frequency correction channel, the outputs of the wide band channel and of the correction channel being connected to two corresponding inputs of an output circuit combining the corresponding output signals so as to form a precorrected signal modified by nonlinearities complementary to those to be corrected.