1. A biosignal processing apparatus comprising: a comparer configured to compare a feature value of a detected biosignal to a set value, determine a determination result indicating whether the feature value is less than the set value, and update the set value based on the determination result; a baseline estimator configured to estimate a baseline of the detected biosignal based on the updated set value; and a controller configured to control a processing logic of the detected biosignal based on the estimated baseline.