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Table 1 Computational cost of different system blocks

From: Stereophonic hands-free communication system based on microphone array fixed beamforming: real-time implementation and evaluation

  Computational cost
Stereophonic (2QSAEC(8(1 + K)log(2QSAEC) + 1) +
acoustic echo + (88K + 9)(QSAEC + 1))/QSAEC
canceler  
Double-talk ((136KDTD + 40)(QSAEC + 1) +
detector + 34QSAEC + 210 + 16(1 + KDTD) +
  + QSAEClog(2QSAEC))/QSAEC
Decorrelation (2(2(2QSAEClog(2QSAEC)) + 2QSAEC + )
module ) + 4(QSAEC + 1)) + 22QSAEC4)/QSAEC
Beamformer M(22QBFlog(2QBF) + 62QBF)/QBF +
  + ((M−1)(QBF + 1))/QBF