Title :
Reconstruction of mutilated speech
Author :
Kabrisky, Matthew ; Rogers, Steven K. ; Bashir, Nadeem A.
Author_Institution :
Wright-Patterson AFB, OH, USA
Abstract :
A system has been developed to enhance the quality of mutilated speech. A standard spectrogram analysis of the damaged speech is performed. The speech is then resynthesized as a sum of computer-generated sinusoids whose amplitudes and phases are derived partly from the given mutilated speech signal and partly from rules based on known properties of normal speech. The sinusoids selected are only approximate harmonics of the glottal pitch and are selected by a nonlinear, noncausal set of rules to reduce the nonspeech components in the synthesized speech output. The system has been shown to increase the quality of the mutilated speech appreciably.<>
Keywords :
computerised signal processing; harmonics; speech synthesis; approximate harmonics; computer-generated sinusoids; computerised signal processing; damaged speech; glottal pitch; mutilated speech; noncausal set of rules; nonlinear rules; speech synthesis; standard spectrogram analysis; synthesized speech; Acoustic noise; Discrete Fourier transforms; Frequency; Humans; Image reconstruction; Signal synthesis; Smoothing methods; Speech analysis; Speech enhancement; Speech synthesis;
Journal_Title :
Aerospace and Electronic Systems Magazine, IEEE
