Method and system for the integral and diagnostic assessment of listening speech quality

In order to determine a speech quality measure related to a signal path of a data transmission system utilized for speech transmission the invention proposes methods for determining a speech quality measure of an output speech signal (y) with respect to an input speech signal (x), wherein said input signal (x) passes through a signal path (100) of a data transmission system resulting in said output signal (y). The invention further proposes respective devices and a system adapted to perform the respective methods. The characteristics of the inventive approach comprise an estimation of individual perceptually-motivated dimension scores with the help of dedicated estimators, integration of a basic listening quality score obtained with the help of a full-reference model and the dimension scores into an overall quality estimation, and separate output of the overall quality score and the dimension scores for the purpose of planning, designing, optimizing, implementing, analyzing and monitoring speech quality.