mlib_SignalLPCPerceptWeighmediaLibLLibramlib_SignalLPCPerceptWeight_F32(3MLIB)NAMEmlib_SignalLPCPerceptWeight_F32 - perform perceptual weighting on input
signal
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_SignalLPCPerceptWeight_F32(mlib_f32 *sigwgt,
const mlib_f32 *signal, const mlib_f32 *lpc, mlib_f32 r1,
mlib_f32 r2, void *state);
DESCRIPTION
The mlib_SignalLPCPerceptWeight_F32() function performs perceptual
weighting on input signal.
The perceptual weighting filter is defined as following.
A(z*r1)
W(z) = ---------
A(z*r2)
where A(z) is the inverse filter
M -i
A(z) = 1 - SUM a(i) * z
i=1
See G.723.1, G.728, G.729, G.729A, GSM EFR standards.
PARAMETERS
The function takes the following arguments:
sigwgt The weighted signal vector.
signal The input signal vector.
lpc The linear prediction coefficients.
r1 The perceptual weighting filter coefficient, it is treated as
1 if 0 is supplied.
r2 The perceptual weighting filter coefficient, it is treated as
1 if 0 is supplied.
state Pointer to the internal state structure.
RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns
MLIB_FAILURE.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOmlib_SignalLPCPerceptWeightInit_F32(3MLIB), mlib_SignalLPCPer‐
ceptWeightFree_F32(3MLIB), attributes(5)SunOS 5.10 2 Mar mlib_SignalLPCPerceptWeight_F32(3MLIB)
