What is "interpolation" in the context of signal processing?

A) The process of estimating values between two known values

B) The process of removing unwanted frequencies

C) The process of converting digital signals to analog

D) The process of analyzing the frequency spectrum

Answer: A) The process of estimating values between two known values

Explanation: Interpolation involves estimating intermediate values between known data points, commonly used in digital signal processing to increase sample rates or fill in missing data.