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Considering the filtering of speech streams, only 37% of the whole speech duration has to be processed by the recognition system (and for MLP).
In this study we performed simulations to investigate the correlation of speech-related artifacts with the respective hemodynamic response in dependency on speech duration and rate of data sampling.
Further analysis involved 1) total speech duration, 2) number of speech bouts, 3) number of mentions of the riders' posture within bouts, 4) type of mentions.
The speech duration of all subjects is shown in Figure 6 and the mean speech duration of the two groups in Table 3.
The speech duration of each subject was measured and compared between the Japanese and Thai subjects.
We will be able to validate Smartphone generated data of speech duration, social activity and physical activity against repeated measures of HAM D-17 and YMRS score over a 6-month period.
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Based on the statistic on TIMIT and NOIZEUS, Mel-frequency cepstrum coefficients (MFCCs) are selected as speech features, Gaussian Mixture distributions (GMD) are applied to associate the observations in MFCC domain with both speech and non-speech states, and Weibull and Gamma distributions are used to explicitly model noise and speech durations, respectively.
Furthermore, to avoid too short segments, a smoothing constraining the minimal non-speech duration to 0.5 s was applied.
The system classifies environmental and breathing noise, and estimates means and standard deviations for the three lognormal distributions associated with spontaneous speaking: short pauses, long pauses and speech segment duration.
The individual attributes are speech-rate, duration of the longest voiced speech and ratio of voiced and unvoiced region.
Relying on the speech/non-speech decisions of the frames (by considering the harmonics for the voiced speech and durations for the unvoiced speech), a noise tracking algorithm is proposed [20].
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com