SDKZSPF LSI, SDKZSPF Datasheet - Page 340

• Manufacturer Part Number: SDKZSPF
• Manufacturer: LSI

Specifications of SDKZSPF

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E.6
E.6.1
E-8
API Specification for IIR Library Function on G2
IIR
Synopsis
void lib_IIR(short *indata, short *coef, short *state, short N)
Input
Short *indata
Short *coef
Short *state
Short N
Return
None
Output
Output is returned in the “indata” input data vector.
Description
This function implements an in-place Infinite Impulse Response (IIR)
filter.
Dependencies/Assumptions
The input data is assumed to be in Q1.15 format.
The number of taps in the filter “T” must be a multiple of 2.
Coefficients are stored as -a1/2, -a2/2, b1/2, b2/2, ..., b0/2.
Input data is stored 0, In(0), In(1), ..., In(N).
Signal Processing Library
Copyright © 1999-2003 by LSI Logic Corporation. All rights reserved.
Pointer to input data.
Coefficient vector.
Intermediate state of the filter.
Length of the input data vector.