Patent ID: 8174516

Claim:
An image display unit including a first reference signal generation means for generating a first reference signal, that constitutes an image display system along with an image signal transmitter for inserting the first reference signal into each of a plurality of picture signals to output as an image signal, that inputs the image signal through a transmission path, and that displays an image based on the image signal, comprising: a second reference signal generation means for generating a second reference signal similar to that of the first reference signal generation means; a plurality of waveform equalizers provided that correspond to the plurality of picture signals and that include a filter circuit capable of setting a characteristic thereto; and a control portion for inputting the plurality of picture signals, analyzing a characteristic of a transmission path between the image signal transmitter and the image display unit upon detecting the first reference signal in the input picture signals by comparing the first reference signal with the second reference signal, and setting a characteristic inverse to the analyzed characteristic of the transmission path to a filter circuit of the waveform equalizers that corresponding to the input picture signals, wherein each of the waveform equalizers includes a noise reduction circuit for correcting degradation in S/N ratio due to the filter circuit, the noise reduction circuit has a variable correction amount, and the control portion adjusts the correction amount by using the noise reduction circuit corresponding to the characteristic set to the filter circuit.