Codebook Search Functions

These functions perform open loop pitch estimation using the adaptive codebook, and search in ACELP excitation (fixed) codebook for optimal signs and positions of the pulses.

• OpenLoopPitchSearch_G723
  Searches for an optimal pitch value.
• ACELPFixedCodebookSearch_G723
  Searches the ACELP fixed codebook for the excitation.
• AdaptiveCodebookSearch_G723
  Searches for the close loop pitch and the adaptive gain index.
• MPMLQFixedCodebookSearch_G723
  Searches the MP-MLQ fixed codebook for the excitation.
• ToeplizMatrix_G723
  Calculates 416 elements of the Toepliz matrix for fixed codebook search.

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