A signal processing device including: one or more vector processors configured to perform vector processing to a signal using a parameter, one or more scalar processors configured to perform scalar processing for generating the parameter, a first circuit coupled to the one or more vector processors and the one or more scalar processors and configured to transfer the parameter from the one or more scalar processors to the one or more vector processors, and a second circuit coupled to the one or more vector processors and another circuit that inputs the signal to the second circuit, and configured to transfer the signal among the one or more vector processors and the other circuit.