Cepstrum-Based Bandwidth Extension for Super-Wideband Coders

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This letter proposes a bandwidth extension (BWE) method using the cepstral envelope coding and duplication of quantized wideband (WB) signals by means of analysis -by-synthesis (AbS) for super-wideband (SWB) coders. In the proposed method, a high frequency band is generated by utilizing the quantized cepstral coefficients extracted from the envelope and the quantized modified discrete cosine transform (MDCT) shape of the wideband signal. The proposed method is compared with the latest G.718 SWB codec and the experimental results show that the proposed method outperforms the baseline codec both in subjective listening tests and objective performance measures.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-05
Language
English
Article Type
Article
Citation

IEEE SIGNAL PROCESSING LETTERS, v.21, no.5, pp.503 - 507

ISSN
1070-9908
DOI
10.1109/LSP.2014.2307074
URI
http://hdl.handle.net/10203/188826
Appears in Collection
EE-Journal Papers(저널논문)
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