the biological information processing apparatus 10 of the present invention, the biological signal generated in the cardiac cycle a peak detector 13 which detects a peak, and the detection result on the basis of the waveform cutout section 14 cuts out a first peak between biological signal between the two adjacent peaks on the time axis of the biological signal of the peak detector 13, I and a resampler 15 for converting a first peak between biological signal to a predetermined number of samples of the second peak between biological signals. Furthermore, ecological information processing apparatus 10 includes an orthogonal transform unit 16 for generating an orthogonal transform coefficients by orthogonal transformation of second peak between biological signals, differential processing for generating a difference signal of the orthogonal transform coefficients in the time domain It comprises a part 17, a coding unit 18 for coding the differential signal.本発明の生体情報処理装置10は、心拍周期で発生する生体信号のピークを検出するピーク検出部13と、ピーク検出部13の検出結果に基づいて、生体信号の時間軸上で隣り合う2つのピークの間の第1ピーク間生体信号を切り出す波形切り出し部14と、第1ピーク間生体信号を所定のサンプル数の第2ピーク間生体信号に変換するリサンプリング部15とを備える。さらに、本発明の生態情報処理装置10は、第2ピーク間生体信号を直交変換して直交変換係数を生成する直交変換部16と、時間軸上における直交変換係数の差分信号を生成する差分処理部17と、差分信号を符号化する符号化部18とを備える。
