@InProceedings{Trojahn2017_254,
<br/>   author = {Franziska Trojahn and Martin Meszaros and Michael Maruschke and Oliver Jokisch},
<br/>   booktitle = {Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2017},
<br/>   title = {Surround Sound Processed by Opus Codec: A Perceptual Quality Assessment},
<br/>   year = {2017},
<br/>   editor = {Jürgen Trouvain and Ingmar Steiner and Bernd Möbius},
<br/>   month = mar,
<br/>   pages = {300--307},
<br/>   publisher = {TUDpress, Dresden},
<br/>   abstract  = {The article describes the first perceptual quality study of 5.1 surround
sound that has been processed by the Opus codec standardised by the Internet
Engineering Task Force (IETF). All listening sessions with up to five subjects took
place in a slightly sound absorbing laboratory – simulating living room conditions.
For the assessment we conducted a Degradation Category Rating (DCR) listeningopinion
test according to ITU-T P.800 recommendation with stimuli for six channels
at total bitrates between 96 kbit/s and 192 kbit/s as well as hidden references. A
group of 27 naive listeners compared a total of 20 sound samples. The differences
between uncompressed and degraded sound samples were rated on a five-point
degradation category scale resulting in Degradation Mean Opinion Score (DMOS).
The overall results show that the average quality correlates with the bitrates. The
quality diverges for the individual test stimuli depending on the music characteristics.
Under most circumstances, a bitrate of 128 kbit/s is sufficient to achieve acceptable
quality.},
<br/>   isbn = {978-3-959080-92-7},
<br/>   issn = {0940-6832},
<br/>   keywords = {Poster},
<br/>   url = {https://www.essv.de/pdf/2017_300_307.pdf},
<br/>}