Content-type: text/html Man page of mlib_SignalLPCPerceptWeight_F32

mlib_SignalLPCPerceptWeight_F32

Section: mediaLib Library Functions (3MLIB)
Updated: 2 Mar 2007
Index Return to Main Contents
 

NAME

mlib_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 TYPEATTRIBUTE VALUE

Interface StabilityCommitted

MT-Level

 

SEE ALSO

mlib_SignalLPCPerceptWeightInit_F32(3MLIB), mlib_SignalLPCPerceptWeightFree_F32(3MLIB), attributes(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
PARAMETERS
RETURN VALUES
ATTRIBUTES
SEE ALSO

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Time: 02:37:56 GMT, October 02, 2010