Speech processing system, speech processing method, speech processing program, vehicle including speech processing system on board, and microphone placing method

A microphone placing method comprising arranging a plurality of microphones, each of which inputs a sound mixture including speech of a speaker of interest and noise from a noise source region including a plurality of noise sources placed in a lateral direction with respect to the speaker of interest, and outputs a mixture signal including a speech signal and a noise signal, such that a difference between respective distances from the plurality of microphones to the speaker of interest becomes different from a difference between respective distances from the plurality of microphones to the noise source region.

A speech processing method comprising:

• selecting microphones to output a mixture signal including a speech signal and a noise signal, out of a plurality of microphones, each of which inputs a sound mixture including speech of the speaker of interest and noise from a noise source region including a plurality of noise sources placed in a lateral direction with respect to a speaker of interest, and outputs the mixture signal, the plurality of microphones being arranged such that a difference between respective distances from the plurality of microphones to the speaker of interest becomes different from a difference between respective distances from the plurality of microphones to the noise source region;
• and
• suppressing the noise based on the mixture signals output from the selected microphones.

A non-transitory computer readable storage medium storing a speech processing program for causing a computer to execute a method, comprising:

• selecting microphones to output a mixture signal including a speech signal and a noise signal, out of a plurality of microphones, each of which inputs a sound mixture including speech of the speaker of interest and noise from a noise source region including a plurality of noise sources placed in a lateral direction with respect to a speaker of interest, and outputs the mixture signal, the plurality of microphones being arranged such that a difference between respective distances from the plurality of microphones to the speaker of interest becomes different from a difference between respective distances from the plurality of microphones to the noise source region;
• and
• suppressing the noise based on the mixture signals output from the selected microphones.