A Hierarchical Framework Approach for Voice Activity Detection and Speech Enhancement

Table 1

Average speech/nonspeech hit rates under different noise conditions at 5 dB.

VAD	Noise
	White	Buccaneer	Babble	Factory	Average
G.729	80.4%	49.4%	51.6%	57.1%	59.6%
Amr2	75.5%	63.3%	64.2%	64.5%	66.9%
Proposed	87.9%	69.7%	70.3%	73.2%	75.3%