Patent ID: 9589577
Date: 2017-03-07
CPC Classifications: G10L

Claim:
1. A speech recognition apparatus, comprising: a low-pass filter and a band-pass filter, the low-pass filter and the band-pass filter respectively performing a low-pass filtering and a band-pass filtering of a first consonant frequency band and a second consonant frequency band for a voice signal in order_to generate a low-pass filter signal, a first band-pass filter signal and a second band-pass filter signal respectively; and a central processing unit, coupled to the low-pass filter and the band-pass filter, and dividing the voice signal, the low-pass filter signal, the first band-pass filter signal and the second band-pass filter signal into a plurality of voice frames, wherein each of the voice frames comprises an N number of sampling signals, N is a positive integer, wherein the central processing unit calculates energies of the sampling signals in a target voice frame in order to obtain an energy of an original voice sampling signal, an energy of a low-pass sampling signal, an energy of a first consonant frequency band signal and an energy of a second consonant frequency band signal, calculates a ratio value of the energy of the second consonant frequency band signal according to the energy of the second consonant frequency band signal, the energy of the original voice sampling signal and the energy of the low-pass sampling signal, and determines whether the original voice sampling signal corresponding to the target voice frame is a consonant signal according to at least one of a ratio of the energy of the low-pass sampling signal to the energy of the original voice sampling signal and the ratio value of the energy of the second consonant frequency band signal.