Sound processing apparatus and method, and program
The present technology relates to a sound processing apparatus and method, and a program for enabling more stable localization of a sound image. A virtual speaker is assumed to exist on the lower side among the sides of a tetragon having its corners formed with four speakers surrounding a target sound image position on a spherical plane. Three-dimensional VBAP is performed with respect to the virtual speaker and the two speakers located at the upper right and the upper left, to calculate gains of the two speakers at the upper right and the upper left and the virtual speaker, the gains being to be used for fixing a sound image at the target sound image position. Further, two-dimensional VBAP is performed with respect to the lower right and lower left speakers, to calculate gains of the lower right and lower left speakers, the gains being to be used for fixing a sound image at the position of the virtual speaker. The values obtained by multiplying these gains by the gain of the virtual speaker are set as the gains of the lower right and lower left speakers for fixing a sound image at the target sound image position. The present technology can be applied to sound processing apparatuses.
1. A sound processing apparatus comprising:
a speaker selecting unit configured to select four processing-target speakers;
a virtual speaker position determining unit configured to determine a position of a virtual speaker based on the processing-target speakers selected by the speaker selecting unit; and
a gain calculating unit configured to calculate gains of the selected processing-target speakers based on a target sound image position and the determined position of the virtual speaker by performing three-dimensional vector base amplitude panning (VBAP).
2. The sound processing apparatus according to claim 1 , wherein the gains of the selected processing-target speakers each have a value other than 0.
3. A method comprising:
using at least one processor to perform:
selecting four processing-target speakers;
determining a position of a virtual speaker based on the selected four processing-target speakers; and
calculating gains of the selected processing-target speakers based on a target sound image position and the determined position of the virtual speaker by performing three-dimensional vector base amplitude panning (VBAP).
4. The method of claim 3 , wherein calculating the gains of the selected processing-target speakers comprises calculating a gain of each of the selected processing-target speakers as a value other than 0.
5. At least one non-transitory computer-readable storage medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform a method comprising:
selecting four processing-target speakers;
determining a position of a virtual speaker based on the selected four processing-target speakers; and
calculating gains of the selected processing-target speakers based on a target sound image position and the determined position of the virtual speaker by performing three-dimensional vector base amplitude panning (VBAP).
6. The method of claim 5 , wherein calculating the gains of the selected processing-target speakers comprises calculating a gain of each of the selected processing-target speakers as a value other than 0.