SPecXpc
Routine

void SPecXpc (const float ec[], float pc[], int Np)
Purpose

Convert prediction error filter coefficients to predictor coefficients
Description
The error filter coefficients are related to the predictor filter
coefficients by,
ec[0] = 1 (not used)
pc[0] = ec[1]
...
pc[Np1] = ec[Np]
Predictor coefficients are usually expressed algebraically as vectors with
1offset indexing. The correspondence to the 0offset Carrays is as
follows.
p(1) <==> pc[0] predictor coefficient corresponding to lag 1
p(i) <==> pc[i1] 1 <= i < Np
Parameters

> const float ec[]

Prediction error (residual) filter coefficients (Np + 1 values). It is
considered an error if ec[0] is not equal to 1.

< float pc[]

Vector of predictor coefficients (Np values). These are the coefficients
of the predictor filter, with pc[0] being the predictor coefficient
corresponding to lag 1, and pc[Np1] corresponding to lag Np.

> int Np

Number of predictor coefficients
Author / revision
P. Kabal
/ Revision 1.9 2003/05/09
See Also
SPcepXpc,
SPcorXpc,
SPlsfXpc,
SPrcXpc
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