| 摘要 |
In a signal processing method and device which enhance a following speed of an estimated noise in a steep rise section of a noise level and generate little estimation error of a noise spectrum due to an influence of voice in a voice section, a time domain signal that is sampled data of an input signal is extracted, the time domain signal is converted into a frequency domain signal per frame, and an input spectrum is calculated. Furthermore, a minimum value of the input spectrum is acquired, so that a noise spectrum that is a frequency domain signal of a noise component included in the input voice signal is estimated. Moreover, the input spectrum is compared with the noise spectrum, so that whether a section is in a noise section or a mixed section where voice and noise are mixed is determined. |
