Patent ID: 9082415
Filing Date: 2015-07-14
Classification: G10L

Abstract:
1. A sound processing method for processing analog acoustic signals received by a plurality of sound receiving units from a plurality of sound sources, said sound processing method comprising steps of: receiving analog acoustic signals by the plurality of sound receiving units from the plurality of sound sources; converting respective analog acoustic signals received by the respective sound receiving units to digital signals; generating frames having a predetermined time length from the respective acoustic signals that have been converted to digital signals; converting the respective acoustic signals in units of the generated frames into signals on a frequency axis; calculating a difference in phase components at each frequency between the respective acoustic signals that are converted to signals on the frequency axis as a phase difference; determining that an analog acoustic signal received by the sound receiving unit coming from the nearest sound source is included in the generated frame when a percentage or number of frequencies for which the calculated phase difference is equal to or greater than a first threshold value is equal to or less than a second threshold value; determining the frame including the acoustic signal from the nearest sound source based on a result of the determination; and performing the processing for the determined frame.