The influence of video quality on difference threshold of loudness perception

The previous research on visual-auditory interaction has been shown that the quality of visual stimuli may have effect on auditory perception. This paper investigated the quantitative relation between the just noticeable difference (JND) of pure tone loudness and the mean opinion score (MOS) of video quality of different bit rate. In the psychoacoustic experiments loudness JND was measured, in which visual stimuli with three kinds of bit rate were presented to subjects with audio stimuli simultaneously. MOS of video quality was evaluated by subjective assessment. The experiment results indicated that with the decrease of the video bit rate, video quality MOS declined, and loudness JND increased. From experiment results, it is concluded that loudness perception showed downtrend when MOS of video quality declined.