Patent ID: 8687124
Filing Date: 2014-04-01
Classification: H04N

Abstract:
1. A signal processing device that outputs an output signal in which noise components mixed in an input signal have been reduced, comprising: a plurality of noise reduction units, cascade-connected to each other, the input signal being supplied to a most upstream side of the plurality of noise reduction units, each of the plurality of noise reduction units including: a combination of intervals between a target signal and a plurality of signal excluding the target signal to vary from noise reduction unit to noise reduction unit, a first noise reduction unit, which is located on a more upstream side of the plurality of noise reduction units, carries out processing in a lower frequency range and a second noise reduction unit, which is located on a more downstream side of the plurality of noise reduction units, carries out processing in a high frequency range; and each time the input signal is passed through one of the plurality of noise reduction units, which are cascade-connected to each other, noise components mixed in the input signal are gradually reduced in a lower frequency range and gradually increased in a higher frequency range, causing noise components mixed in a signal outputted from the most downstream side of the plurality of noise reduction units to be concentrated in a higher frequency range.