mlib_signallpcperceptweight_f32(3mlib) [opensolaris man page]
mlib_SignalLPCPerceptWeight_F32(3MLIB) mediaLib Library Functions mlib_SignalLPCPerceptWeight_F32(3MLIB) 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 TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_SignalLPCPerceptWeightInit_F32(3MLIB), mlib_SignalLPCPerceptWeightFree_F32(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_SignalLPCPerceptWeight_F32(3MLIB)
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mlib_SignalLPCPerceptWeightInit_S16(3MLIB) mediaLib Library Functions mlib_SignalLPCPerceptWeightInit_S16(3MLIB) NAME
mlib_SignalLPCPerceptWeightInit_S16, mlib_SignalLPCPerceptWeightInit_F32 - initialization for perceptual weighting of linear predictive coding SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_SignalLPCPerceptWeightInit_S16(void *state, mlib_s32 length, mlib_s32 order); mlib_status mlib_SignalLPCPerceptWeightInit_F32(void *state, mlib_s32 length, mlib_s32 order); DESCRIPTION
Each function initializes the internal state structure for perceptual weighting of linear predictive coding (LPC). The init function performs internal state structure allocation and global initialization. Per LPC function call initialization is done in LPC function, so the same internal state structure can be reused for multiple LPC function calls. PARAMETERS
Each function takes the following arguments: state Pointer to the internal state structure. length The length of the input signal vector. order The order of the linear prediction filter. RETURN VALUES
Each 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 ALSO
mlib_SignalLPCPerceptWeight_S16(3MLIB), mlib_SignalLPCPerceptWeightFree_S16(3MLIB), attributes(5) SunOS 5.11 2 Mar 2007 mlib_SignalLPCPerceptWeightInit_S16(3MLIB)