?? invsefilt.c
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/* 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);}
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