Abstract
A new transform-domain speech bandwidth extension algorithm is proposed to transmit the information about the missing speech frequencies over a hidden channel, i.e., the related spectral envelope and gain parameters are hidden within the narrowband speech signal using fast Fourier transform-based data hiding technique. The hidden information is recovered reliably at the receiving end to produce a wideband signal of much higher quality. Obtained results confirm that the excellent reconstructed wideband (RWB) signal quality of the proposed algorithm over the traditional methods.
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Kurada, P., Maruvada, S. & Sanagapallea, K.R. Speech bandwidth extension using transform-domain data hiding. Int J Speech Technol 22, 305–312 (2019). https://doi.org/10.1007/s10772-019-09596-8
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DOI: https://doi.org/10.1007/s10772-019-09596-8