| 摘要 |
<p>There is provided a linear prediction coefficient analyzing apparatus comprising extracting means (63) for extracting a plurality of partial analyzing periods from an analyzing period for a digital signal and extracting a plurality of partial digital signals at the partial analyzing periods from the digital signal, window coefficient multiplying means (64) for multiplying each of the partial digital signals extracted by the extracting means (63) by a window coefficient to generate a window-processed partial digital signal for each of the partial analyzing periods extracted by the extracting means, auto-correlation analyzing means (65) for analyzing an auto-correlation of each of the window-processed partial digital signals generated by the window coefficient multiplying means (64) to generate an auto-correlation function from each of the window-processed partial digital signals for each of the partial analyzing periods, auto-correlation function synthesizing means (66) for weighting each of the auto-correlation functions generated by the auto-correlation analyzing means (65) with a weighting factor to generate a weighted auto-correlation function for each of the partial analyzing periods and adding the weighted auto-correlation functions to each other to generate a synthesized auto-correlation function, and linear prediction coefficient analyzing means (67) for performing a linear prediction analysis for the synthesized auto-correlation function generated by the auto-correlation function synthesizing means (66) to obtain a linear prediction coefficient for the digital signal.</p> |
