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We present PEFAC, a fundamental frequency estimation algorithm for speech that is able to identify voiced frames and estimate pitch reliably even at negative signal-to-noise ratios. The algorithm combines a normalization stage, to remove channel dependency and to attenuate strong noise components, with a harmonic summing filter applied in the log-frequency(More)
We present PEFAC, a fundamental frequency estimation algorithm that is able to identify the pitch of voiced frames reliably even at negative signal to noise ratios. The algorithm combines non-linear amplitude compression, to attenuate narrow-band noise components, with a comb-filter applied in the log-frequency power spectral domain, whose impulse response(More)
We propose a mask-based enhancer for very low quality speech that is able to preserve important cues in a noise-robust manner by identifying the time-frequency regions that contain significant speech energy. We use a classifier to estimate a time-frequency mask from an input feature set that provides information about the energy distribution of both voiced(More)
We present a new method for speech active level estimation which combines a novel algorithm based on voiced speech energy extraction with the standardized ITU-T Recommendation P.56. At poor signal-to-noise ratios, the algorithm estimates the active level by identifying intervals of voiced speech and summing the energy of the pitch harmonics in the(More)
In this paper, we present a novel approach to the classification of speaker likability, that is, a measure of how pleasant a given speaker is to listen to. Instead of blindly extracting a large number of features, we identify a small set of features which represent perceptual speech characteristics. This set of features is sent to a linear support vector(More)
We present an algorithm for identifying the location of sibilant phones in noisy speech. Our algorithm does not attempt to identify sibilant onsets and offsets directly but instead detects a sustained increase in power over the entire duration of a sibilant phone. The normalized estimate of the sibilant power in each of 14 frequency bands forms the input to(More)
Hemineglect is frequent after right hemisphere stroke and prevents functional independence, but effective rehabilitation interventions are lacking. Our objective was to determine if a visual-acoustic alarm in the hemineglect arm activated by a certain discrepancy in movement of both hands can enhance neglect arm use in five tasks of daily living. In this(More)
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