Patent ID: 8665315
Filing Date: 2014-03-04
Classification: G06T,H04N

Abstract:
1. A signal processing device comprising: a change position detection unit that detects stepwise change positions of an n-bit quantized signal generated from an input signal; a density detection unit that calculates a value indicating a degree of density of the stepwise change positions detected by the change position detection unit; and a first low-frequency component extraction unit that extracts a desired low-frequency component from the input signal based on the value indicating the degree of density of the change positions calculated by the density detection unit, wherein the first low-frequency component extraction unit changes the low-frequency component of the input signal to be extracted through a low-pass filter with a variable number of taps by varying the number of taps according to the value indicating the degree of density of the change positions, wherein a same number of taps is set for a range corresponding to a sequence of the stepwise change positions for which intervals between the stepwise change positions of the sequence are the same.