Patent ID: 8731254

Claim:
A biological signal drawing apparatus, drawing biological signals as drawing points in time series, the biological signal drawing apparatus comprising: a thinner which performs a thinning process to thin a first number of the drawing points corresponding to the biological signals sampled in each pixel zone, to obtain a second number of the drawing points for each pixel zone, the second number being smaller than the first number; a calculator which, after the thinning process is performed, calculates a parameter for smoothing the drawing points of the biological signal based on at least one difference of values of adjacent two of the drawing points included in a group that includes: a first drawing point which is a center in time series in the group and which has a first value; and at least one second drawing point which precedes or succeeds the first drawing point in time series and which has a second value; and a processor which performs a process of: performing a weighted moving average calculation using the first value, the second value and the calculated parameter, to obtain a third value; and replacing the first value of the first drawing point with the third value and displaying the third value adjacent to the second value in a smoothed biological signal waveform.