article · IEEE Transactions on Multimedia · 2017

CrowdTranscoding: Online Video Transcoding With Massive Viewers

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Abstract

Driven by the advances in personal computing devices and the prevalence of high-speed network accesses, crowdsourced livecast platforms have emerged in recent years, through which numerous broadcasters lively stream their video content to fellow viewers. Compared to professional video producers and broadcasters, these new generation broadcasters are highly heterogeneous in terms of the network/system configurations and, therefore, the generated video quality, which calls for massive encoding and transcoding in order to unify the video sources and serve multiple quality versions to viewers with different configurations. On the other hand, with the rapid evolution in the hardware industry, high-performance processors become mainstream in personal computer market. More end devices can easily transcode high-quality videos in realtime. We witness huge computational resource among the massive fellow viewers that could potentially be used for transcoding. In this paper, we propose CrowdTranscoding, a novel framework for crowdsourced livecast systems that offloads the transcoding assignment to the massive viewers. We identify that the key challenges in CrowdTranscoding are to detect qualified stable viewers and to properly assign them to the source channels. We put forward a viewer crowdsourcing transcode scheduler to smartly schedule the workload assignment. Our solution has been evaluated under diverse viewer/channel conditions as well as different parameter settings. The trace-driven simulation confirms the superiority of CrowdTranscoder, while our PlanetLab-based and real world end-viewer experiments show the practical performance of our approach, which also give hint to the further enhancement.

Cite this paper

APA 7

He, Q., Zhang, C., & Liu, J. (2017). CrowdTranscoding: Online Video Transcoding With Massive Viewers. IEEE Transactions on Multimedia, 19(6), 1365–1375. https://doi.org/10.1109/tmm.2017.2652061

MLA 9

He, Qiyun, et al. “CrowdTranscoding: Online Video Transcoding With Massive Viewers.” IEEE Transactions on Multimedia, vol. 19, no. 6, 2017, pp. 1365–75, https://doi.org/10.1109/tmm.2017.2652061.

Chicago

He, Qiyun, Cong Zhang, and Jiangchuan Liu. 2017. “CrowdTranscoding: Online Video Transcoding With Massive Viewers.” IEEE Transactions on Multimedia 19 (6): 1365–75. https://doi.org/10.1109/tmm.2017.2652061.

Harvard

He, Q., Zhang, C. and Liu, J. (2017) ‘CrowdTranscoding: Online Video Transcoding With Massive Viewers’, IEEE Transactions on Multimedia, 19(6), pp. 1365–1375. Available at: https://doi.org/10.1109/tmm.2017.2652061.

BibTeX

@article{he2017crowdtranscoding,
  title = {{CrowdTranscoding: Online Video Transcoding With Massive Viewers}},
  author = {He, Qiyun and Zhang, Cong and Liu, Jiangchuan},
  journal = {IEEE Transactions on Multimedia},
  volume = {19},
  number = {6},
  pages = {1365--1375},
  year = {2017},
  doi = {10.1109/tmm.2017.2652061}
}

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