METHOD AND DEVICE TO DISCRIMINATE VOICE AND NOISE, METHOD AND DEVICE TO REDUCE NOISE, VOICE AND NOISE DISCRIMINATING PROGRAM, NOISE REDUCING PROGRAM, AND RECORDING MEDIUM FOR PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a method and a device to discriminate voice and noise with which it is discriminated whether voice and noise that includes non-stationary noise exist in input signals employing one input or not and whether noise including the non-stationary noise is reduced using the discrimination result and to provide a method and a device to reduce noise, a voice and noise discriminating program, a noise reducing program and a recording medium for the programs.

SOLUTION: The noise reducing device includes a plurality featured values computing section 11 which computes a plurality of featured values for voice and noise mixed signals, a featured values analysis section 13 which analyzes information related to voice and noise using the plurality of featured values and input voice and noise mixed signals, a reduction variable computing section 14 which computes reduction variables corresponding to the plurality of noise reduction processes using the analyzed information and the input voice and noise mixed signals and a plurality noise reducing section 15 which on the other hand reduces noise in the input voice and noise mixed signals by a plurality of noise reducing processes employing the computed reduction variables.

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