| 摘要 |
PROBLEM TO BE SOLVED: To improve a degree of freedom in calculating a panning coefficient rather than the prior arts, when implementing sound image localization within a three-dimensional space by giving a monaural input signal while distributing it to three speakers.SOLUTION: From among four or more speakers which are disposed on a spherical surface and among which at least one is not on the same plane, three speakers are selected in such a manner that a spherical surface triangle with the speakers as vertices crosses a direction from a listening position of a sound image corresponding to an input audio signal. The panning coefficient for implementing sound image localization by panning a virtual speaker, which is generated by panning two of these three speakers, and the remaining one speaker is calculated while using any one of a plurality of kinds of predetermined gain distribution functions and in such a manner that an exponent sum of the panning coefficient is fixed. |
