Speech noise discrimination method and device, noise reduction method and device, speech noise discrimination program, noise reduction program

摘要

PPROBLEM 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. PSOLUTION: 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. PCOPYRIGHT: (C)2006,JPO&NCIPI