Patent ID: 6697127
Filing Date: 2004-02-24
Classification: H04N

Abstract:
A gamma correction circuit for correcting an input signal to produce a gamma-corrected output signal, comprising:a data group generator which stores first to n-th gamma correction tables, receives first to n-th gains, and adjusts a level of the input signal using the first to n-th gamma correction tables and the first to n-th gains, thereby producing a gamma-corrected data group including first to n-th gamma-corrected data, n being an integer not less than two; a gamma characteristic controller which loads the first to n-th gains into said data group generator; a signal level discriminator which outputs a discrimination signal based on the level of the input signal, the first to n-th gamma correction tables, and the first to n-th gains; and an output selector which selects from among the first to n-th gamma-corrected data on the basis of a value of the discrimination signal, thereby producing the gamma-corrected output signal.