Sound processing device, and sound processing method

摘要

A sound processing apparatus (400) is provided with: a directivity synthesis processing unit (410) for generating a first directivity sound pick-up signal by synthesizing a first sound pick-up signal and a relatively delayed second sound pick-up signal and a second directivity sound pick-up signal by synthesizing a relatively delayed first sound pick-up signal and a second sound pick-up signal; a comparison signal calculation unit (440) for generating a non-directivity level signal indicating the level of a sum of the directivity sound pick-up signals and a directivity level signal by adding the levels of the directivity sound pick-up signals; a level comparison unit (451) for acquiring the difference between the levels of the non-directivity level signal and the directivity level signal; and a delay control unit (452) for adjusting the delay amount such that the difference between the levels becomes smaller.

主权项

1. A sound processing apparatus that performs directivity synthesis processing of a first picked-up sound signal output from a first sound pickup unit and a second picked-up sound signal output from a second sound pickup unit, the apparatus comprising:
a directivity synthesis processing section that generates a first directional picked-up sound signal by delaying the second picked-up sound signal relative to the first picked-up sound signal and combining the first picked-up sound signal with the delayed second picked-up sound signal, and that generates a second directional picked-up sound signal by delaying the first picked-up sound signal relative to the second picked-up sound signal and combining the delayed first picked-up sound signal with the second picked-up sound signal; a comparison signal calculation section that generates a non-directional level signal indicating a level of a signal obtained by adding up the first directional picked-up sound signal and the second directional picked-up sound signal, and that generates a directional level signal obtained by adding up a first level signal indicating a level of the first directional picked-up sound signal and a second level signal indicating a level of the second directional picked-up sound signal; a level comparison section that acquires a level difference between the non-directional level signal and the directional level signal; and a delay operation section that adjusts an amount of the delay in the directivity synthesis processing section so as to reduce the level difference.