1. A non-intrusive signal quality assessment method, including the steps of: determining parameters (E n e ,T n ,f n ) representing frames of a signal; extracting a collection of per-frame feature vectors (φ(n)) representing structural information of selected frames (Ω) of said signal from said parameters; determining a global feature set (ψ) over said collection of feature vectors (φ(n)) from predetermined statistical moments of selected feature vector components (φ 1} φ 2 ,. .. φ n ); predicting a signal quality measure (Q) from said global feature set.