Patent ID: 11900949
Assignee: NEC CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A signal extraction system comprising:
a memory storing instructions; and
one or more processors configured to execute the instructions to:
input a neural network in which a first network having a layer for inputting an anchor signal belonging to a predetermined class and a mixed signal including a target signal belonging to the class and a layer for outputting, as an estimation result, a reconstruction mask indicating a time-frequency domain in which the target signal is present in the mixed signal and a second network having a layer for inputting the target signal extracted by applying the mixed signal to the reconstruction mask and a layer for outputting a result obtained by classifying the input target signal into a predetermined class are combined;
apply an anchor signal and the mixed signal to the first network to estimate a reconstruction mask of a class to which the anchor signal belongs;
apply the mixed signal to the estimated reconstruction mask to extract a target signal, and apply the extracted target signal to the second network to classify the target signal into a class;
calculate a loss function between the class to which the extracted target signal is classified and a true class;
update a parameter of the first network and a parameter of the second network in the neural network based on the calculation result of the loss function; and
output the updated first network.