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http://dx.doi.org/10.7776/ASK.2008.27.6.309

A Study of BWE-Prediction-Based Split-Band Coding Scheme  

Song, Geun-Bae (삼성전자 통신연구소)
Kim, Austin (삼성전자 통신연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.27, no.6, 2008 , pp. 309-318 More about this Journal
Abstract
In this paper, we discuss a method for efficiently coding the high-band signal in the split-band coding approach where an input signal is divided into two bands and then each band may be encoded separately. Generally, and especially through the research on the artificial bandwidth extension (BWE), it is well known that there is a correlation between the two bands to some degree. Therefore, some coding gain could be achieved by utilizing the correlation. In the BWE-prediction-based coding approach, using a simple linear BWE function may not yield optimal results because the correlation has a non-linear characteristic. In this paper, we investigate the new coding scheme more in details. A few representative BWE functions including linear and non-linear ones are investigated and compared to find a suitable one for the coding purpose. In addition, it is also discussed whether there are some additional gains in combining the BWE coder with the predictive vector quantizer which exploits the temporal correlation.
Keywords
Split-band Coding; Predictive Coding Scheme; Bandwidth Extension; Predictive Vector Quantizer;
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Times Cited By KSCI : 1  (Citation Analysis)
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