| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise suppression device in which a noise recognizing property in noise environment is improved, and also suppression of noise is performed in a short time. SOLUTION: A noise suppression part 114 includes; a noise probability distribution estimation part 200 which receives featured values 124 which are extracted respectively from frames having a prescribed time length which are made frames every prescribed period as to noise superposition speech in which a clean speech and noise are superposed , and generates estimated parameters 206 of noise every frame successively using a particle filter based on a prescribed state space model about the noise superposition speech and a clean speech HMM about an objective speech; and a parameter generation part 202 and a clean speech estimation part 204 for calculating estimated feature values 126 of the objective speech every frame using the featured values 124 of the noise superposition speech and the estimated parameters 206 of noise and the clean speech HMM 130. COPYRIGHT: (C)2006,JPO&NCIPI |
