Patent ID: 7280160
Filing Date: 2007-10-09
Classification: H04N

Abstract:
1. An apparatus for processing video signals, comprising: a memory device operable to store a look-up table in which optimal filter tap coefficients corresponding to a number of noise levels are registered; a noise measurement unit operable to obtain a noise measurement from input video signals during a period; a filter coefficient determination unit operable to select optimal filter tap coefficients from the memory device based on the noise measurement obtained by the noise measurement unit; a noise suppression filter operable to employ the optimal filter tap coefficients selected by the filter coefficient determination unit to filter and remove noise from the input video signals; and a video signal processor operable to perform video signal processing on the result output by the noise suppression filter; wherein the noise measurement unit comprises a subtraction unit which calculates differences between pixel data of the input video signals corresponding to respective same positions during the period; an absolute value generator which generates absolute values of the differences; and an accumulator which sums up the absolute values, wherein the sum corresponds to noise measurement from input video signals.