Patent ID: 7966179

Claim:
A method of detecting a voice region with a voice region detecting apparatus, the method comprising: converting an input voice signal representing at least a physical voice into a frequency domain signal by preprocessing the input voice signal; performing sigmoid compression on the converted signal; transforming at least one component of a spectrum vector generated by the sigmoid compression into a scalar voice detection parameter wherein the transforming is performed using the equation P ⁡ ( x ) = ∑ k = 0 n - 1 ⁢ y k ⁢ log ⁢ ⁢ ( y k ) , where y k is a component of the sigmoid compressed spectrum vector, and P(x) is a scalar voice detection parameter; detecting the voice region by comparing the scalar voice detection parameter with a threshold and determining that a region in which the scalar voice detection parameter exceeds the threshold is the voice region; and outputting a voice signal in the detected voice region, wherein the method is performed using the voice region detecting apparatus.