LSFToLSP

Converts Line Spectral Frequencies to LSP coefficients.

Syntax

IppStatus ippsLSFToLSP_G729_16s (const Ipp16s* pLSF, Ipp16s* pLSP);

Parameters

pLSF	Pointer to the LSF vector [10], in Q13 in the range [0, π ].
pLSP	Pointer to the LSP vector [10], in Q15 in the range [-1; 1].

Description

The function ippsLSPToLSF_G729 is declared in the ippsc.h file. This function converts the Line Spectral Frequencies (LSF) to the LSP coefficients as given by:

pLSP[i] = cos(pLSF[i]), i = 1,..., 10 .

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.
ippStsOverflow	Indicates a warning that at least one result value was saturated.