Patent ID: 9613632
Date: 2017-04-04
CPC Classifications: G10L,H04M

Claim:
1. A signal processing device comprising: a first input unit which obtains a first mixed signal in which a first signal and a second signal are mixed; a second input unit which obtains a second mixed signal in which the first signal and the second signal are mixed in a different ratio from the first mixed signal; a delay unit which generates a delayed first mixed signal by delaying the first mixed signal with a delay amount based on transmission distance from a generation source of the second signal to the second input unit; a subtracting unit which outputs an estimated first signal in which a pseudo second signal is subtracted from the delayed first mixed signal; and an adaptive filtering unit which generates the pseudo second signal applying coefficients which are updated based on the estimated first signal and the second mixed signal, wherein the delay amount is adaptively controlled using the estimated first signal such that the estimated first signa