Title :
Nonlinear filtering of the LPC residual for noise suppression and speech quality enhancement
Author :
Mermelstein, Paul ; Qian, Yasheng
Author_Institution :
Quebec Univ., Canada
Abstract :
We study enhancing the quality of coded speech by nonlinear filtering the linear-prediction residual to make it more periodic. By attenuating the low-magnitude samples, more of the residual energy can be concentrated in the regularly spaced major excitation pulses. Wideband additive noise in the speech signal is attenuated because its residual energy is spread in time, rather than being concentrated in narrow temporal regions
Keywords :
acoustic noise; interference suppression; linear predictive coding; nonlinear filters; speech coding; speech enhancement; LPC residual; attenuation; coded speech; low-magnitude samples; noise suppression; nonlinear filtering; regularly spaced major excitation pulses; residual energy; speech quality enhancement; speech signal; wideband additive noise; Additive noise; Attenuation; Distortion; Filtering; Linear predictive coding; Nonlinear filters; Signal synthesis; Speech analysis; Speech enhancement; Speech synthesis;
Conference_Titel :
Speech Coding For Telecommunications Proceeding, 1997, 1997 IEEE Workshop on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-4073-6
DOI :
10.1109/SCFT.1997.623890
