| 摘要 |
A pitch estimating method and device, and a pitch estimating program for estimating the weight of the probability density function of the fundamental frequency and the amplitudes of the harmonic components with operations less than conventional. In the improved pitch estimating method, 1200log2h and exp[-(x-(F+1200log2h))<2>/2W<2>] of equation 121 is computed in advance. [Eq. 121] (61) The computation of cq. 121 is executed only for the fundamental frequency F at which x-(F+1200log2h) is close to 0, and the result is stored in a memory of the computer. With this, the operations can be made much less than conventional, and the computation time can be shortened. |
