| OCR Text |
Show SECURITY CLASSIFIC ATI ON OF THIS PAGE(~~,ai b.t. Enl.rod) - \20. ABSTRACT CON'T ~Il1 tary command and control environments . Overall contributions resulting from this research program incl ude the understanding of how environmental noise degrades narrow band , coded speech , development of appropriate real time noise suppression algorithms, and development of speech parameter Identification methods that consider signal contamination as a fundamental element In the estimation process. This report describes the-cureent -researe- ,...... ~~~ ~~d results in the areas of noise suppression using the spectral subtraction algorithm , dual input adaptive noise cancellation using the INS algorithm , pole-zero parameter estimation, nonparametric-rank order statistics wi th applications to Robust Speech activity dç~ection, spectral analysis and synthesis using the constant- Q transform , and pitch and rate changes to speech using the constant-Q transform. ?A~ ISSION for NTIS White SectIis~~ XC Buff 3icticp~~~ JUSTIFICATION -__________ - a-- By CW~ t 8tfl1fl~ t AYA~A81tI1Y ~UE$ Dist. A.A;L z~d/or SPEC~M~ ~~~~~~ UNANNOUNCED 0 SECURITY CLASSIFICATION OF THIS PA OE(WIi.n D~~. &,tor.~~ L ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~-~~~~-~~ -- |
