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• W2103133081 abstract "The limited audio bandwidth used in telephone systems degrades both the quality and the intelligibility of speech. This paper presents a new method for the bandwidth extension of telephone speech. Frequency components are added to the frequency band 4–8 kHz using only the information in the narrowband speech. First, a wideband excitation is generated by spectral folding from the narrowband linear prediction residual. The highband of this signal is divided into four subbands with a filter bank, and a neural network is used to weight the subbands based on features calculated from the narrowband speech. Bandwidth-extended speech is obtained by summing the weighted subbands and the original narrowband signal. Listening tests show that this new method improves speech quality compared with a previously published bandwidth extension method." @default.
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• W2103133081 date "2010-08-01" @default.
• W2103133081 modified "2023-09-27" @default.
• W2103133081 title "Bandwidth extension of telephone speech using a filter bank implementation for highband MEL spectrum" @default.
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• W2103133081 doi "https://doi.org/10.5281/zenodo.41932" @default.
• W2103133081 hasPublicationYear "2010" @default.
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