Patent ID: 6100938
Filing Date: 2000-08-08
Classification: H04N

Abstract:
A gamma correction circuit for a television receiver, comprising:a low pass filter for filtering a gamma-corrected luminance signal, gamma-corrected at a transmitter side;a luminance signal corrector for generating a first correction value to correct a high frequency component of the filtered luminance signal, the high frequency component being distorted due to the gamma correction at the transmitter side;an operator for extracting the high frequency component from the gamma-corrected luminance signal and the filtered luminance signal, and for dividing the extracted high frequency component by the first correction value;a color signal corrector for generating a second correction value to correct a high frequency component of a color signal transmitted from the transmitter side; anda color signal restoration unit for inverse-converting the second correction value, multiplying the inverse-converted second value and an output of the operator, and outputting the multiplied value.