Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Pitch extracting method for a speech processing unit
 A method of extracting at least one pitch from every frame of a speech signal, which includes the steps of generating a number of residual signals revealing high and low points of the speech signal within a frame, and taking one of those residual signals which satisfies a predetermined condition among the generated residual signals, as the pitch. In the step of generating the residual signals, the speech is filtered using a FIR-STREAK filter which is a combination of the finite impulse response (FIR) filter and a STREAK filter, and the filtration result is output as the residual signal. In the step of generating the pitch, only the residual signal whose amplitude is over a predetermined value, and the residual signal whose temporal interval is within a predetermined period of time is generated as the pitch. 
Samsung Electronics Co., Ltd.
G
G10L
inventional
See-Woo
Lee