SBR Audio Encoder Functions

This section provides a reference guide to Intel IPP for SBR audio encoder. Figures below show use of SBR Encoder for improvement of the core audio encoder and the common pipeline of SBR encoder.

Intel IPP functions described in this section implement algorithms that can be used to develop HE-AAC Encoder compliant with the ETSI/3GPP [EC126] standards.

• DetectTransient_SBR
  Estimates stationarity of signal by calculating deviation of spectrum audio signal.
• EstimateTNR_SBR
  Measures Tonality-to-Noise Ratio of complex QMF subband samples.
• AnalysisFilterEncGetSize_SBR
  Returns size of analysis FilterSpec_SBR specification structures, init and work buffers.
• AnalysisFilterEncInit_SBR
  Initializes analysis specification structure.
• AnalysisFilterEnc_SBR
  Performs subband filtering of the input audio signal.
• AnalysisFilterEncInitAlloc_SBR
  Creates and initializes analysis SBR pecification structure.
• AnalysisFilterEncFree_SBR
  Closes analysis filter specification structure.

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