Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (2024)

Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (2)

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  • Felix Hechler University of Duisburg-Essen

    University of Duisburg-Essen

    Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (3)0009-0005-0868-0818

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  • Michael Rudolph University of Duisburg-Essen

    University of Duisburg-Essen

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  • Amr Rizk University of Duisburg-Essen

    University of Duisburg-Essen

    Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (5)0000-0002-9385-7729

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MMSys '24: Proceedings of the 15th ACM Multimedia Systems ConferenceApril 2024Pages 89–99https://doi.org/10.1145/3625468.3647614

Published:17 April 2024Publication HistoryJust-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (6)

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MMSys '24: Proceedings of the 15th ACM Multimedia Systems Conference

Just-in-Time Transcoding of 360° Video Streams

Pages 89–99

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Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (7)

ABSTRACT

Adaptive streaming of 360° tiled video requires encoding tiles to multiple qualities to support client decisions in the light of fluctuating bandwidth and dynamic view-ports. Some static approaches allocate fixed encoding resources independently of the scene complexity introducing a significant resource overhead while other static approaches add a substantial time delay relative to the source. As tiles of 360 ° video have a skewed popularity with a statistical concentration of the user requests static approaches are resource inefficient. Specifically, in live streaming the tile popularity and encoding time statistics are not present beforehand.

We present JITENC, a 360° streaming backend for network edge deployment that employs just-in-time encoding in response to incoming tile requests. JITENC leverages encoding time prediction to optimize the scheduling of tile encoding tasks, hence, it can also be used for live streaming given a real-time transcoding time deadline. Our prototype demonstrates that JITENC can achieve a perceived quality that is comparable to oversized static systems that encode all tiles in every quality while significantly reducing the computing resource utilization and power consumption.

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      Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (96)

      MMSys '24: Proceedings of the 15th ACM Multimedia Systems Conference

      April 2024

      557 pages

      ISBN:9798400704123

      DOI:10.1145/3625468

      Copyright © 2024 ACM

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          Just-in-Time Transcoding of 360° Video Streams | Proceedings of the 15th ACM Multimedia Systems Conference (97)

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          • HTTP adaptive streaming
          • Transcoding time prediction
          • adaptive streaming
          • transcoding
          • video complexity
          • video encoding

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