The transmitted parameters extraction procedure that takes place at the transmitter side. The source and target signals are both separated into 17 subbands and the LPC cepstral and residual vectors are extracted. The subband selector selects which subbands and which vectors within each subband require cepstral/residual conversion. At the final stage, each of the 17 analysis subbands will be classified to one of the four frequency intervals used during training. Under this classification, the conversion parameters are extracted for the source and target signals, using one of the four trained pdfs.