Hi, did anyone ever have a look at MPQM (Moving Picture Quality Metric)? http://citeseer.nj.nec.com/basso96study.html http://citeseer.nj.nec.com/vandenbrandenlambrec96working.html http://citeseer.nj.nec.com/verscheure96perceptual.html For some reasons, it seems to disappears after '97, but some parts seem familiar, e.g. "activity" masking gruel