PURPOSE:To provide a tone quality subjective evaluation prediction system capable of improving predictive accuracy by evaluating it using a weighing distance measure considering the auditory sense characteristic of a human. CONSTITUTION:By an input audio signal characteristic extraction part 4, a characteristic parameter is extracted from an input audio signal, and by a regenerative audio signal characteristic extraction part 5, the characteristic parameter is extracted from a regenerative audio signal, and by an input audio signal dynamic characteristic extraction part 6, a dynamic characteristic parameter is extracted from the characteristic parameter of the input audio signal, and by a first weighing coefficient extraction part 7, a first weighing coefficient is extracted from the characteristic parameter of the input audio signal, and by a second weighing coefficient extraction part 8, a second weighing coefficient is extracted from the dynamic characteristic parameter, and by an objective evaluation part 9, a distance between the characteristic parameters of the input and the regenerative audio signals is calculated considering the first and the second weighing coefficients to output an objective evaluation value, and by a subjective evaluation prediction part 10, an subjective evaluation value is predicted using the objective evaluation value.
展开▼
