Parameter-based speech quality measures for GSM

AlxwaciThis contribution introduces instrumental speech quality measures for the GSM system based only on transmission parameters. Certain combinations of CSM parameters which quantify the transmission quality in terms of bit error rate, received power level, etc., were shown be suitable for the prediction of the resulting speech quality. Neither the original nor the received speech signal is needed for this kind of prediction. The proposed speech quality measures have been v31idated by extensive link-lwei simulations which are based on measurements oftransmission parameters collected in a GSM1800 network. Speech samples were produced by bit-exact transmission simulations using the measured [ink parameters for channel modelling. The reference speech quality assessments of these samples were carried out with the PESQ algor i thm 131. The correlation of the presented parameter measures r\ i th the intrusive PESQ measure is remarkable.