removedc.c

来自「speech signal process tools」· C语言 代码 · 共 25 行

/*
| This material contains proprietary software of Entropic Processing, Inc.   
| Any reproduction, distribution, or publication without the the prior	   
| written permission of Entropic Processing, Inc. is strictly prohibited.
| Any public distribution of copies of this work authorized in writing by
| Entropic Processing, Inc. must bear the notice			
|								
|              "Copyright 1986 Entropic Processing, Inc."
*/
#ifdef SCCS
static char *sccs_id = "@(#)removedc.c	1.2 4/29/86";
#endif
float remove_dc(x,size) 	/* remove dc value in a data sequence */
float x[];
int size;
{
	int i;
	float dc = 0.0, avg = 0.0;
	for (i = 0; i < size; dc += x[i++]);
	avg = dc/size;
	for (i = 0; i < size; x[i++] -= avg);
	return dc;
}