EncodeTNS

Performs reversion of TNS in the Long Term Reconstruct loop in-place.

Syntax

IppStatus ippsEncodeTNS_AAC_32s_I(Ipp32s* pSrcDst, const int* pTnsNumFilt, const int* pTnsRegionLen, const int* pTnsFiltOrder, const int* pTnsFiltCoefRes, const Ipp8s* pTnsFiltCoef, const int* pTnsDirection, int maxSfb, int profile, int samplingRateIndex, int winLen);

Parameters

pSrcDst	On input, pointer to the spectral coefficients for the TNS encoding operation.
	On output, pointer to the spectral coefficients after the TNS encoding operation.
pTnsNumFilt	Pointer to the number of TNS filters.
pTnsRegionLen	Pointer to the length of TNS filter.
pTnsFiltOrder	Pointer to the TNS filter order.
pTnsFiltCoefRes	Pointer to the TNS coefficient resolution flag.
pTnsFiltCoef	Pointer to the TNS filter coefficients.
pTnsDirection	Pointer to the TNS direction flag.
maxSfb	Maximum scale factor number.
profile	Audio profile.
samplingRateIndex	Sampling frequency index.
winLen	Window length.

Description

This function is declared in the ippac.h file. The function performs in-place reversion of TNS in the LTP loop, or Analysis Temporal Noise Shaping.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when at least one of the specified pointers is NULL.
ippStsTnsProfileErr	Indicates an error when profile != 1.
ippStsAacTnsNumFiltErr	Indicates an error when pTnsNumFilt exceeds [0, 1] for the short window sequence or [0, 3] for the long window sequence.
ippStsAacTnsLenErr	Indicates an error when pTnsRegionLen exceeds [0,numSwb].
ippStsAacTnsOrderErr	Indicates an error when pTnsFiltOrder exceeds [0, 7] for the short window sequence or [0, 12] for the long window sequence.
ippStsAacTnsCoefResErr	Indicates an error when pTnsFiltCoefRes exceeds [3, 4].
ippStsAacTnsCoefErr	Indicates an error when pTnsFiltCoef exceeds [-8, 7].
ippStsAacTnsDirectErr	Indicates an error when *pTnsDirection exceeds [0,1].
ippStsAacSmplRateIdxErr	Indicates an error when samplingRateIndex exceeds [0, 11].
ippStsAacWinLenErr	Indicates an error when winLen is not equal to 128 or 1024.