Signal processing device and signal processing method

A signal processing device, comprising:

• an input interface configured to receive an output signal Va(T) from a sensor;
• and
• a prediction unit configured to generate, in accordance with a value Va_T1 of an output signal obtained at a time T1, in a transition response period before a response time period Tr or Td elapses, a predicted value Vb_T2 corresponding to a value of an output signal to be obtained at a time T2 after the time T1, where Tr denotes a response time period during which the value of the output signal Va(T) changes from a first converged value Vc1 corresponding to a first value P1 of a parameter representing a certain property of an object to be measured to a second converged value Vc2 corresponding to a second value P2 different from the first value P1 of a parameter representing the certain property of the object to be measured, and Td denotes a response time period during which the value of the output signal Va(T) changes from the second converged value Vc2 to the first converged value Vc1, wherein
• the prediction unit generates the predicted value so that TrE<Tr, TdE<Td, |1−Td/Trl>|1−TdE/TrE| are satisfied, where TrE denotes a response time period during which the predicted value becomes a value corresponding to the second converged value Vc2, and TdE denotes a response time period during which the predicted value becomes a value corresponding to the first converged value Vc1.