PROBLEM TO BE SOLVED: To provide a device capable of accurately determining generation of a biological signal which is a detection object, while suppressing an increase in an amount of calculation of signal processing.SOLUTION: A biological signal processing device for processing a digitalized input signal that can include a biological signal includes: filter processing means for setting a cut-off frequency between a frequency related to a biological signal and a frequency related to a main noise, and subjecting the input signal to filter processing by a cut-off bandwidth including the frequency related to the main noise and signal determination means for specifying a signal related to a frequency outside the cut-off bandwidth from the input signal subjected to the filter processing, and determining at least generation of a biological signal. Here, it is also desirable that the filter processing means subjects the input signal to filter processing using a moving average while the signal determination means calculates an auto-correlation coefficient in the input signal subjected to the filter processing, and specifies a signal related to the frequency outside the cut-off bandwidth based on the relationships between the auto-correlation coefficient and a lag.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】信号処理の計算量の増大を抑制しつつ、検知対象である生体信号の発生をより精度良く判定可能な装置を提供する。【解決手段】本装置は、生体信号を含み得るデジタル化された入力信号を処理する生体信号処理装置であって、生体信号に係る周波数と主ノイズに係る周波数との間に遮断周波数を設定し、主ノイズに係る周波数を含む遮断帯域によるフィルタ処理を入力信号に施すフィルタ処理手段と、フィルタ処理を施された入力信号から遮断帯域外の周波数に係る信号を特定し、少なくとも生体信号の発生を判定する信号判定手段とを有する。ここで、フィルタ処理手段は、入力信号に対して移動平均を用いたフィルタ処理を施し、一方、信号判定手段は、フィルタ処理を施された入力信号における自己相関係数を算出し、自己相関係数とラグとの関係に基づいて遮断帯域外の周波数に係る信号を特定することも好ましい。【選択図】図3
