Document Type

Conference Paper

Rights

This item is available under a Creative Commons License for non-commercial use only

Disciplines

1.2 COMPUTER AND INFORMATION SCIENCE, Computer Sciences

Publication Details

MM 2014 - Proceedings of the 2014 ACM Conference on Multimedia

Abstract

Users of audio-visual streaming services expect an ever in- creasing quality of experience. Channel bandwidth remains a bottleneck commonly addressed with lossy compression schemes for both the video and audio streams. Anecdotal evidence suggests a strongly perceived link between bit rate and quality. This paper presents three audio quality listen- ing experiments using the ITU MUSHRA methodology to assess a number of audio codecs typically used by stream- ing services. They were assessed for a range of bit rates using three presentation modes: consumer and studio qual- ity headphones and loudspeakers. Our results indicate that with consumer quality headphones, listeners were not dif- ferentiating between codecs with bit rates greater than 48 kb/s (p>=0.228). For studio quality headphones and loud- speakers aac-lc at 128 kb/s and higher was di erentiated over other codecs (p<=0.001). The results provide insights into quality of experience that will guide future development of objective audio quality metrics.

Share

COinS