[Retracted] Modeling and Simulation of English Speech Optimization Teaching Recognition Based on Intelligent Edge Detection Algorithm

Table 2

COSR results before and after FFPRLS feature set optimization.

Vocabulary	Characteristic parameters	0 dB	5 dB	10 dB	15 dB	20 dB	Average recognition rate
10 words	FFPSS_D	79.52	86.19	88.57	89.18	90.00	86.69
	PCA-features1	86.67	91.43	89.05	89.57	91.43	89.63
	FFPSS_D + TEOCC	81.43	89.05	91.90	91.43	92.38	89.24
	PCA-features2	87.14	90.00	91.43	91.95	92.86	90.68
20 words	FFPSS_D	73.56	80.30	83.27	86.41	87.90	82.29
	PCA-features1	78.57	82.14	87.38	87.95	89.76	85.16
	FFPSS_D + TEOCC	74.67	83.27	87.55	89.39	89.94	84.96
	PCA-features2	80.00	85.95	89.29	89.59	91.19	87.20