/* perform inverse filtering *//*| 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 SCCSstatic char *sccs_id = "@(#)invsefilt.c	1.2 4/29/86";#endiffloat   invse_filter (c, state, order, input)float   c[], state[], input;int     order;{    int     j;    double  t = input;    for (j = 1; j <= order; j++)	t -= c[j] * state[j];    for (j = order; j > 1; j--)	state[j] = state[j - 1];    state[1] = input;    return (t);}