Method and device for determining the quality of a speech signal

Included extreme weak or hush up parts of the degradation of signal, used to predict deterioration in speech processing/transmission system for speech signal perceived quality of an objective measuring method and device may be causing poor predictions. Through in pretreatment stage in the application using first will marked factor (s (Y+ δ)) of first will marked steps, and using has second will marked factor (s alpha (Y+ δ); s alpha (Y+ δ I), i=1,2) of second will marked steps, achieved has improved, which by in first will marked factor is increased has a adjustment value (δ) of output signal of power of countdown value of a function, by in second will marked factor basically is equal to improve to a has 0 and 1 Zhijian of adjustment value (Alpha) of index of first will marked factor. Can perform on the various locations of the equipment described in the second calibration step. Using test signals and clear definition of subjective quality scores to adjust these values.