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http://dx.doi.org/10.4218/etrij.13.0212.0368

Transform Coding Based on Source Filter Model in the MDCT Domain  

Sung, Jongmo (Broadcasting & Telecommunications Media Research Laboratory, ETRI)
Ko, Yun-Ho (Department of Mechatronics Engineering, Chungnam National University)
Publication Information
ETRI Journal / v.35, no.3, 2013 , pp. 542-545 More about this Journal
Abstract
State-of-the-art voice codecs have been developed to extend the input bandwidth to enhance quality while maintaining interoperability with a legacy codec. Most of them employ a modified discrete cosine transform (MDCT) for coding their extended band. We propose a source filter model-based coding algorithm of MDCT spectral coefficients, apply it to the ITU-T G.711.1 super wideband (SWB) extension codec, and subjectively test it to validate the model. A subjective test shows a better quality over the standardized SWB codec.
Keywords
Source filter model; transform coding; MDCT; G.711.1 Annex D;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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