English

DTIC ADA054952: Study and Development of Speech-Separation Techniques.

One of the most common types of interference in speech communication is that caused by the speech of a competing talker. A technique has been developed for suppressing such interference by examining the Fourier transform of the input and selecting the harmonics of the desired voice. The initial version of this process was applicable only to vocalic speech (i.e., speech consisting only of vowels and vowel-like sounds), but in subsequent research steps have been taken to extend the process to natural (i.e., unrestricted) speech. This report describes the improvements which have been made in this research, first, to ruggedize the process so that it can perform in an natural-speech environment, second, to improve the intelligibility and naturalness of the recovered speech, and third, to enable the process to handle the non-vocalic speech sounds (such as plosives and fricatives) which occur in natural speech. (Author)

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