AuthorsP. Ni, A. Eichhorn, C. Griwodz and P. Halvorsen
TitleFrequent Layer Switching for Perceived Quality Improvements of Coarse-Grained Scalable Video
AfilliationCommunication Systems, Communication Systems
Publication TypeJournal Article
Year of Publication2010
JournalACM Multimedia Systems Journal
Date PublishedMay

Scalable video is an attractive option for adapting the bandwidth consumption of streaming video to the available bandwidth. Fine-grained scalability can adapt most closely to the available bandwidth, but this comes at the cost of a higher overhead compared to more coarse- grained videos. In the context of VoD streaming, we have therefore explored whether a similar adaptation to the available bandwidth can be achieved by performing layer switching in coarse-grained scalable videos. In this approach, enhancement layers of a video stream are swit- ched on and off to achieve any desired longer term band- width. We have performed three user studies, two using mobile devices and one using an HDTV display, to eval- uate the idea. In several cases, the far-from-obvious con- clusion is that layer switching is a viable way of achieving bit-rate savings and fine-grained bit-rate adaptation even for rather short times between layer switches, but it does, however, depend on scaling dimensions, content and dis- play device.

Citation KeySimula.mpg.6