| 摘要 |
PROBLEM TO BE SOLVED: To provide a speech processing unit capable of enhancing the reliability of speech recognition.SOLUTION: A speech processing unit has a plurality of microphones 22 arranged in a vehicle, a speech source azimuth determination unit 16 for determining the azimuth of a speech source by handling a sound signal as a spherical wave when the speech source, i.e., the generation source of a speech included in the sound signal acquired by each of the plurality of microphones, is located in the near field, and determining the azimuth of a speech source by handling a sound signal as a plane wave when the speech source is located in the far field, and a beam forming processing unit 12 performing the beam forming so as to suppress the sound arriving from an azimuth range other than the azimuth range including the azimuth of the speech source.SELECTED DRAWING: Figure 2 |
