Superwideband Bandwidth Extension Using Normalized MDCT Coefficients for Scalable Speech and Audio Coding

Table 2

Preference test results.

Signal type	Preference score (%)
	Conventional BWE	No difference	Proposed BWE
Speech	8.89	48.89	42.22
Music	11.11	31.11	57.78
Noisy speech	11.11	48.89	40.00
Average	10.37	42.96	46.67