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_G729
  Searches for an optimal pitch value.
• AdaptiveCodebookSearch_G729
  Searches for the integer delay and the fraction delay, and computes the adaptive vector.
• DecodeAdaptiveVector_G729
  Restores the adaptive codebook vector by interpolating the past excitation.
• FixedCodebookSearch_G729
  Searches for the fixed codebook vector.
• GainCodebookSearch_G729
  Finds pitch and fixed gains.
• ToeplizMatrix_G729
  Calculates elements of the Toepliz matrix for the fixed codebook search.

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