MUSIC REPRODUCTION DEVICE AND AUDIO SIGNAL PROCESSING METHOD
PROBLEM TO BE SOLVED: To implement appropriate bass emphasis when reproducing and outputting musical sounds while using a speaker of which bass reproduction performance is low.SOLUTION: In a music reproduction device, a boost coefficient calculation part 110 extracts a coefficient KL (t). Then, on t...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To implement appropriate bass emphasis when reproducing and outputting musical sounds while using a speaker of which bass reproduction performance is low.SOLUTION: In a music reproduction device, a boost coefficient calculation part 110 extracts a coefficient KL (t). Then, on the basis of the extracted signal, a gain corresponding to an emphasis target low tone is calculated. Moreover, in an output sound signal generation section 120(j=L, R), a BPF part 121L extracts a signal LS(t) of the emphasis target low tone from a source sound signal S(t). Continuously, an amplification part 123L amplifies a signal DL(t) resulting from delaying the signal LS(t) with the gain corresponding to the emphasis target low tone, and generates a signal BL(t). Then, an addition section 124 adds the signal BL(t) to a signal DS(t) resulting from simply delaying the source sound signal S(t).SELECTED DRAWING: Figure 6
【課題】低音再生性能が低いスピーカを用いて楽曲音を再生出力する場合に、適切な低音強調を行う。【解決手段】楽曲再生装置においてブースト係数算出部110は、係数KL(t)を抽出する。そして、当該抽出された信号に基づいて、増強対象低音域に対応するゲインを算出する。また、出力音信号生成部120j(j=L,R)において、BPF部121Lが、ソース音信号Sj(t)から当該増強対象低音域の信号LSj(t)を抽出する。引き続き、増幅部123Lが、増強対象低音域に対応するゲインで、信号LSj(t)が遅延された信号DLj(t)を増幅し、信号BLj(t)を生成する。そして、加算部124が、信号BLj(t)を、ソース音信号Sj(t)を単に遅延させた信号DSj(t)に加算する。【選択図】図6 |
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