Name | Synopsis | Description | Parameters | Return Values | Attributes | See Also
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_SignalLPCPerceptWeight_S16(mlib_s16 *sigwgt, const mlib_s16 *signal, const mlib_s16 *lpc, mlib_s32 lscale, mlib_s16 r1, mlib_s16 r2, void *state);
The mlib_SignalLPCPerceptWeight_S16() 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.
The function takes the following arguments:
The weighted signal vector, the signal samples are in Q15 format.
The input signal vector, the signal samples are in Q15 format.
The linear prediction coefficients.
The scaling factor of the linear prediction coefficients, where actual_data = input_data * 2**(-scaling_factor).
The perceptual weighting filter coefficient, the coefficient is in Q15 format, it is treated as 1 if 0 is supplied.
The perceptual weighting filter coefficient, the coefficient is in Q15 format, it is treated as 1 if 0 is supplied.
Pointer to the internal state structure.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
ATTRIBUTE TYPE |
ATTRIBUTE VALUE |
---|---|
Interface Stability |
Committed |
MT-Level |
MT-Safe |
mlib_SignalLPCPerceptWeightInit_S16(3MLIB), mlib_SignalLPCPerceptWeightFree_S16(3MLIB), attributes(5)
Name | Synopsis | Description | Parameters | Return Values | Attributes | See Also