CALCULATION SYSTEM FOR AUTOCORRELATION COEFFICIENT

PURPOSE:To easily obtain a stable autocorrelation coefficient of m-th degree by performing digital processing based upon a specific expression without multiplying a digital input signal of speech, etc., by a window function. CONSTITUTION:The autocorrelation coefficient of m-th degree rhom' is found by digital processing from an expression II without multiplying the digital input signal expression I of speech, etc., by the window function. In this case, the system is composed of hardware, a divider, etc., for internal product arithmetic expression IV between, for example, two data expressions I and III. Consequently, digital data can be processed consistently through the constitution of the simple hardware and the stable autocorrelation coefficient of m-th degree is found without multiplying the digital input signal the window function.