The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The design of measurement matrices is one of the key contents of the compressed sensing (CS) theory. This paper constructs a new dual-structured measurement matrix-unit array + random matrix, by combining the advantages of the random measurement matrices with high recovery probability and the structured measurement matrices of low storage. The experiments show that the reconstruction errors can be...
A speech enhancement method based on wavelet packet transform and hearing masking effect is proposed. This method has following steps. Firstly, by perceptual wavelet packet the noisy speech is enhanced. Then by Johnston hearing masking model the noise hearing masking threshold is gained. Finally, by a perceptual filter based on hearing masking effect the enhanced speech is smoothed, the clean speech...
The filter bank in the front-end of a speech recognition system mimics the function of the basilar membrane. It is believed that the closer the band subdivision is to human perception, the better the recognition results. This paper proposes the use of warped filter banks (WFBs) to replace traditional FIR filter banks and validates its use for the recognition of noisy speech. The WFBs bandwidths can...
A modified speech enhancement algorithm based on the subspace is advanced. It reduces residual noise caused by wrongly estimating noise eigenvalue matrix and speech eigenvalue matrix, because in the traditional speech enhancement algorithm based on the subspace, the eigenvalue matrix of noise are attained by eigen-decomposing to covariance matrix of noise, but covariance matrix of noise is estimated...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.