An adaptive comb filter coefficient extraction circuit in a shared data path for hardware reduction

摘要

The present invention relates to an adaptive comb filter coefficient extraction circuit of a shared data path for hardware reduction capable of reducing hardware size using a shared data path, Color difference data, V-color difference data, U-color difference data, and V-color difference data, which are delayed by a predetermined line, and time-division multiplexes the U and V color difference data, and inputs the color difference data output from the time-A correlation calculating and determining unit for calculating a correlation value, comparing the correlation with a predetermined threshold value, and outputting a result of the correlation; and a comb filter coefficient output unit for outputting a comb filter coefficient according to an output value of the correlation calculating and determining unit. At the point when a meaningless filter coefficient is generated by a combination of the current U-correlation and the previous V-correlation, And simultaneously it generates a valid filter coefficients for the entire clock by interpolating using a filter coefficient, including interpolation and fading unit for soft and to have a gradual change in a sudden change of the filter coefficient may reduce the size of hardware.