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NOISE DETECTION DEVICE, NOISE DETECTION METHOD, NOISE REDUCTION DEVICE, NOISE REDUCTION METHOD, COMMUNICATION DEVICE, AND PROGRAM
NOISE DETECTION DEVICE, NOISE DETECTION METHOD, NOISE REDUCTION DEVICE, NOISE REDUCTION METHOD, COMMUNICATION DEVICE, AND PROGRAM
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机译：噪声检测装置，噪声检测方法，噪声降低装置，噪声降低方法，通信装置以及程序
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摘要
PROBLEM TO BE SOLVED: To detect periodic sudden sound with high precision and with a small delay time, and thereby to enable an appropriate response on the basis of the detected noise.SOLUTION: A noise detection device 100 sections input sound data into frames with a predetermined time width, detects sudden sound per each frame, and determines periodicity of the detected sudden sound, to detect periodic sudden sound. The sudden sound is detected by use of duration time at a peak position and the amount of change in a peak. The periodicity of the sudden sound is determined by an autocorrelation value in an outline-modeled waveform of the sudden sound and evenness of time width of the waveform. A noise reduction device 500 performs sound pressure amount adjustment corresponding to a voice signal inclusion rate per each frame to the detected periodic sudden sound, and thereby reduces noise. Communication devices 200 and 600 perform notice on the basis of the detected periodic sudden sound and telephone calls with reduced noise.SELECTED DRAWING: Figure 1
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