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Tracking of stationary noise is not an issue when compared to non-stationary noise tracking as stationary noise properties remain constant throughout time. When noise properties itself is changing with time noise standard deviation estimation is found to be a better tool in analyzing noise properties. It is estimated to find out the noise power spectrum which is assumed to be same as noise variance...
The Throat Microphone (TM) is a non-acoustic device, relying on the vibrations of vocal folds rather than the audible sound produced. Correctly capturing vocal fold vibrations is difficult due to poor signal representation capabilities. The system recognizes the TM vibrations and produces the corresponding speech sound. This is done by extracting features from the spectrum of the TM vibrations and...
This paper presents speech encryption based on four-dimensional hyperchaotic systems. Higher order chaotic systems can generate pseudo random numbers (PRN) of more complex dynamical properties. Hyper chaotic sequence is proofed with good randomness and unpredictability. In this approach, the speech scrambles are compressed by DCT to reduce residual intelligibility. Coefficients are then masked by...
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