BandJoinUpsample

Joins high and low frequency signals and upsamples the result.

Syntax

IppStatus ippsBandJoinUpsample_AMRWBE_16s(const Ipp16s* pSrcSigLF, const Ipp16s* pSrcSigHF, int lenSrc, Ipp16s* pDstSig, int lenDst, Ipp16s* pMem, Ipp16s* pInterFracMem, Ipp32s* pCountSamp, Ipp16s resampleFactor);

Parameters

pSrcSigLF	Pointer to the low frequency signal.
pSrcSigHF	Pointer to the high frequency signal.
lenSrc	Length of low frequency and high frequency vectors.
pDstSig	Pointer to the upsampled signal.
lenDst	Length of the destination vector.
pMem	Pointer to the memory for resampling [72].
pInterFracMem	Pointer to the memory for interpolating fraction.
pCountSamp	Pointer to the number of oversampled samples.
resampleFactor	Downsampling frequency scale factor.

Description

The function ippsBandJoinUpsample_AMRWBE is declared in ippsc.h file. This function is used by the decoder: it combines the high and low frequency signals and upsamples the result to produce the full band output signal. This operation is inverse of the encoder band-splitting operation performed by the function ippsBandSplitDownsample_AMRWBE.

See also 3GPP TS 26.290: “Extended AMR Wideband Speech Codec; Transcoding functions", clauses 6.6 [AMRWB+].

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointer is NULL.
ippStsSizeErr	Indicates an error when lenSrc or lenDst is less than or equal to zero.