ENVIRONMENTAL SOUND SIGNATURE GENERATION METHOD, DEVICE, AND PROGRAM, POSITION ESTIMATION METHOD, SYSTEM, DEVICE, AND PROGRAM USING ENVIRONMENTAL SOUND SIGNATURE

摘要

PROBLEM TO BE SOLVED: To allow an environmental sound signature generation in which the equipment cost is low and the discrimination accuracy is high.SOLUTION: At a user terminal MS1, an environmental sound in a room L1 in which the user terminal MS1 is located is recorded a plurality of times (N times), each recorded data is Fourier-transformed, then, a CDF related to the amplitude is calculated from each measurement sound data that has been Fourier-transformed for each frequency, and CDF curved-surface data is generated in which the CDF is expressed by a function of the frequency and amplitude. Then, a CDF cross section on which the CDFs match with a plurality of thresholds k-kis extracted from the generated CDF curved-surface data, and the extracted CDF cross section is set as signature data of the environmental sound.SELECTED DRAWING: Figure 6