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A mapping function between different speaker frequency envelopes based on GMM is put forward, in which several linear functions are combined by probability, and LSF parameter is adopted to reflect the frequency envelope. The initial mapping parameter are gotten by the relation of average and covariance between source and target GMM. Furthermore, the EM algorithm is adopted to refine the mapping function,...
Detection of the number of signals is a key issue in array signal processing. In the case of small number of snapshots, the performance of Akaike Information theoretic Criteria (AIC) and Maximum Description Length (MDL) will deteriorate due to the large estimation error of covariance matrix of observed data. In this paper a new method for detecting the number of signals based on Multi-Stage Wiener...
Some communication applications, like multimedia, deliver data of different importance classes allowing unequal error protection (UEP) levels. In this paper, a multiple-input multiple-output (MIMO) system using orthogonal frequency division multiplexing (OFDM) is considered with a new UEP bit-loading algorithm based on the non-UEP algorithm by Chow, Cioffi, and Bingham. In the proposed bit-loading...
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