METHOD AND SYSTEM FOR DETERMINING A PERCEIVED QUALITY OF AN AUDIO SYSTEM

摘要

The invention relates to a method for determining a quality indicator representing a perceived quality of an output signal of an audio system with respect to a reference signal. The reference signal and the output signal are processed and compared. The processing includes dividing the reference signal and the output signal into mutually corresponding time frames. Additionally, the processing includes scaling the intensity of the reference signal towards a fixed intensity level, and then performing measurements on time frames within the scaled reference signal for determining reference signal time frame characteristics. The intensity of the reference signal is then scaled from the fixed intensity level towards an intensity level related to the output signal. Further on in the method, the loudness of the output signal is scaled towards a fixed loudness level in the perceptual loudness domain. This scaling action uses the reference signal time frame characteristics. Finally, the loudness of the reference signal is scaled from a loudness level corresponding to the output signal related intensity level towards a loudness level related to the loudness level of the scaled output signal in the perceptual loudness domain. This scaling action also uses the reference signal time frame characteristics.