sspmod_n_mean.c File Reference

Calculation of noise mean and variance. More...

Functions
int	spr_n_mean_setup (SprSspInfo *Info, const char **descript, void *aux_info)
int	spr_n_mean_process (SprSspInfo *Info, const void *frame_in, void *frame_out)
void	spr_n_mean_reset (SprSspInfo *Info, SprSspStatus *action)
void	spr_n_mean_free (SprSspInfo *Info)

Detailed Description

Calculation of noise mean and variance.

This program calculates the noise means and variances. Initialisation over init_nfr. Speech detection information should be given as input. The means and variances are calculated recursively from the initvalue.

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[n_mean]
nfr <number>
Number of frames used for initial mean/variance-values calculation. Set it to -1 if all frames should be used. Default 100.
spdet_in <copy/move> <buf_name>
Name of the second input stream. Speech detection information (1 or 0)
alpha_m <number>
Updating factor for mean, default 0.02.
alpha_v <number>
Updating factor for variance, default 0.02.

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Author

Tom Claes

Date

19 January 1996