Patent attributes
This invention relates to a new parameter suitable for use in non-intrusive speech quality assessment system. The invention provides a method of generating a parameter from a signal comprising a sequence of values measured from voiced portions of said signal at a sampling frequency, said parameter suitable for use in a quality assessment tool. The method includes steps of selecting portions of frequency transformed sections of the signal in dependence upon a pitch estimate; generating an average value for each portion; and generating a section parameter depending upon the difference between the averages of successive portions. Said section parameter is averaged over a number of iterations of the method to generate the new parameter of the invention.