NOISE/REVERBERATION REMOVAL DEVICE, METHOD THEREOF, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a noise/reverberation removal device which uses only exemplar models of clean voice to perform voice emphasis.

SOLUTION: An emphasizing processing result reliability calculation unit outputs a value indicative of uncertainty of a primary voice emphasis signal in accordance with a feature quantity of an input signal and the primacy voice emphasis signal. A matching unit receives the primary voice emphasis signal, the value indicative of uncertainty of the primary voice emphasis signal, and exemplar models of learning data and outputs a learning data segment which gives a clean voice sequence closest to clean voice included in the input signal with respect to each time frame. A voice emphasis filtering unit receives the input signal and the learning data segment, reads out amplitude spectrum data pairing the learning data segment from an exemplar model storage unit to generate a Wiener filter, multiplies a power spectrum of the input signal by the Wiener filter to perform filtering, and outputs a voice emphasis signal.

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