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

Table 1

Comparison of bit allocation between the conventional BWE algorithm and the proposed one with a typical set of the design parameters, where the algorithms are realized in the SWB extension of G.729.1 Annex E.

Parameter	Conventional; BWE	Proposed BWE
		Bit allocation	Typical: 𝑀𝑔= 14, 𝑀𝑓= 2
Initial gain		m	5
Subband gains	28	n · (𝑀𝑔−1)	26
Fetch indices	32	7𝑀𝑓	14
Single sinusoidal/; mode indicator/; envelop shaping	19	19	19
Total	79		64