LSFToLSP_GSMAMR

Converts Line Spectral Frequencies to LSP coefficients.

Syntax

IppStatus ippsLSFToLSP_GSMAMR_16s (const Ipp16s* pLSF, Ipp16s* pLSP);

Parameters

pLSF	Pointer to the vector [10] of LSF normalized by factor 1/π in Q14, so given in the range [0,1].
pLSP	Pointer to the LSP vector [10], in Q15 in the range [-1,1].

Description

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

lsp_n = cos(lsf_n), 1 ≤ n ≤ 10.

Return Values

ippStsNoErr	Indicates no error.
IppStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.