Audio quality improvements mask video defects, but video quality does not mask audio defects.

Evidence

Crossmodal effects also exist. Joly et al. (2001) showed that better audio quality can make video degradation less annoying, but good video quality was not found to improve the perceived audio quality. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1820

Categorization

• QUESTION: Why is the audio-to-video masking asymmetric? Is there a modality hierarchy in perception worth pursuing?