LSPQuant

Performs quantization of LSP coefficients.

Syntax

IppStatus ippsLSPQuant_RTA_32f(const Ipp32f* pSrcLSP, const Ipp32f* pSrcLPC, Ipp32f* pDstLSP, int order, int* pDstLSPIndex, IppPCMFrequency frequency, int complexity);

Parameters

pSrcLSP	Pointer to the input unquantized LSP vector.
pSrcLPC	Pointer to the input unquantized LPC vectorþ
pDstLSP	Pointer to the output quantized LSP vector.
order	LP coefficients filter order, possible values are: 4, 6, 8, 10.
pDstLSPIndex	Pointer to the output vector of quantized LSP indexes.
frequency	Sampling frequency, possible values are:
	IPP_PCM_FREQ_8000 8000 Hz,
	IPP_PCM_FREQ_16000 16000 Hz,
	IPP_PCM_FREQ_22050 22050 Hz,
	IPP_PCM_FREQ_32000 32000 Hz.
complexity	Complexity control parameter, possible values are: 0, 1, 2, 3.

Description

The function ippsLSPQuant_RTA is declared in the ippsc.h file.

This function performs quantization of LSP coefficients.

Return Values

ippStsNoErr	Indicates no error.
IppStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.
IppStsRangeErr	Indicates an error when complexity is less than 0 or greater than 3; or order is not equal to 4, 6, 8, 10; or frequency is not equal to the possible values.