| 摘要 |
PURPOSE:To obtain a sound image having a broadening feeling by obtaining a sum and a difference of a signal obtained by delaying a monaural signal and an original signal to input to R(right) system and L(left) system and similarly processing the signal obtained by shifting a phase of the monaural signal by 90 deg. to input to the R system and the L system. CONSTITUTION:A monaural sound signal 1 is directly inputted to a comb line filter F1 and the 90 deg. phase shifted 5 signal is inputted to a comb line filter F2. In the filter F1, a sum signal 3 and a difference signal 4 of a signal delaying 2 an original signal and the original signal are obtained. In the filter F2, a sum signal 7 and a difference signal 8 of a signal delaying 6 a phase shift signal 5 and the phase shift signal 5 are obtained. The sum signal 3 and the difference signal 8 are added 9 to drive a speaker spR of R system. The subtraction 10 between the difference signal 4 and the sum signal 7 is performed to drive a speaker SpL of L system. Thereby, in a whole frequency range, and right left channels having small correlation are formed and a broadening sound image is realized and a stereophomic feeling is increased. |
