Information processing device, and calculation method

A calculation method performed by an information processing device, the calculation method comprising:

• acquiring sound signals outputted from a plurality of microphones;
• analyzing frequencies of the sound signals;
• acquiring predetermined information indicating a steering vector in a first direction as a direction from the plurality of microphones to a target sound source;
• calculating a filter for formation in a second direction as a direction different from the first direction based on the frequencies and the information indicating the steering vector in the first direction;
• and
• calculating a steering vector in the second direction by using an expression indicating a relationship between the calculated filter and the steering vector in the second direction.

An information processing device comprising:

• a processor to execute a program;
• and
• a memory to store the program which, when executed by the processor, performs processes of,
• acquiring sound signals outputted from a plurality of microphones;
• analyzing frequencies of the sound signals;
• acquiring predetermined information indicating a steering vector in a first direction as a direction from the plurality of microphones to a target sound source;
• calculating a filter for formation in a second direction as a direction different from the first direction based on the frequencies and the information indicating the steering vector in the first direction;
• and
• calculating a steering vector in the second direction by using an expression indicating a relationship between the calculated filter and the steering vector in the second direction.