John S. Collura

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Speech communication in Electronic Warfare (EW) environment should be resistant to interception, masquerade and tolerant to communication channel errors. In this paper, we described an algorithm which provides speech compression, strong encryption, error tolerance and speaker authentication features. This Robust Speech Coder (RSC) is backward compatible(More)
One improvement to recent advances in low bit rate vocoders such as noted in Collura and Tremain 2] would result from the identiication of speech \outliers." Digitized speech segments (22.5 ms or smaller) are approximated by 10 long vectors of autoregressive coeecients (from Linear Predictive Coding of digitized speech) and further transformed into vectors(More)
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