Encoder signal processing device, printer, printer-equipped imaging apparatus, and encoder signal processing method

An encoder signal processing device comprising:

• an encoder signal input unit that inputs an encoder signal including a pulse signal having a cycle corresponding to a transport speed of a transported body from an encoder detecting the transport speed of the transported body;
• an effective detection period setting unit that sets an effective detection period for detecting a subsequent pulse signal each time the pulse signal is detected from the input encoder signal, the effective detection period begins after a last previously detected pulse signal and is a time width before and after a time pulse signal is detected in a case where the subsequent pulse is expected based on the cycle;
• a pulse signal detection unit that detects the pulse signal from the encoder signal only within the set effective detection period;
• and
• a pulse signal generation unit that generates a substitute pulse signal immediately after the effective detection period in a case where the subsequent pulse signal is not detected from the encoder signal within the effective detection period.