Patent ID: 8180002

Claim:
A digital signal processing device that executes specific signal processing under which a return noise is generated in a processing result signal, comprising: an up-sampling processing unit to perform up-sampling processing for a digital signal with a predetermined up-sampling rate to generate an up-sampling signal; a specific signal processing unit to perform the specific signal processing for the up-sampling signal generated by the up-sampling processing unit to generate the processing result signal; a down-sampling processing unit to perform down-sampling processing for the processing result signal generated by the specific signal processing unit with a predetermined down-sampling rate to generate a down-sampling signal; a processing execution setting unit that sets whether the specific signal processing is to be executed; and a control unit that, in case the processing execution setting unit is set to execute the specific signal processing, controls the up-sampling processing unit, the specific signal processing unit, and the down-sampling processing unit to execute the up-sampling processing, the specific signal processing, and the down-sampling processing, and, in case the processing execution setting unit is set not to execute the specific signal processing, controls the up-sampling processing unit, the specific signal processing unit, and the down-sampling processing unit not to execute the up-sampling processing, the specific signal processing, and the down-sampling processing.