Selective efficiency videofrequency non-linearity correction...

Details Selective efficiency videofrequency non-linearity correction... Selective efficiency videofrequency non-linearity correction...

H - Electricity

04

N

350/81

H04N 5/21 (2006.01) H04N 5/38 (2006.01)

Patent

CA 1199102

SELECTIVE EFFICIENCY VIDEOFREQUENCY NON- LINEARITY CORRECTION DEVICE ABSTRACT OF THE DISCLOSURE A selective efficiency videofrequency non-linearity precorrection device comprising a direct channel and an auxiliary processing channel both coupled to the input receiving the videofrequency signal. The auxiliary channel comprises a low pass filter, an inverting amplifier, a non- linearity corrector circuit selecting a range of the signal limited by thresholds added with suitable phase and amplitude to the signal transmitted by the direct channel so that the resulting signal has, with respect to the input videofrequency signal, compression or expansion limited to the range thus selected and only for the low frequency components of this signal.

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