Fine-grained scalable streaming from coarse-grained videos

  • Authors:

  • Pengpeng Ni;Alexander Eichhorn;Carsten Griwodz;Pål Halvorsen

  • Affiliations:

  • Simula Research Laboratory, Lysaker, Norway;Simula Research Laboratory, Lysaker, Norway;Simula Research Laboratory, Lysaker, Norway;Simula Research Laboratory, Lysaker, Norway

  • Venue:
  • Proceedings of the 18th international workshop on Network and operating systems support for digital audio and video
  • Year:
  • 2009

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Abstract

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 high compression penalty. In the context of VoD streaming to mobile end systems, 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 switched on and off to achieve any desired longer-term bandwidth. We performed user studies to evaluate the idea, and came to the far-from-obvious conclusion that layer switching is viable way for bit-rate savings and fine-grained bit-rate adaptation even for rather short times between layer switches.