Vortrag: LwTE: Light-weight Transcoding at the Edge
Stammdaten
Titel: | LwTE: Light-weight Transcoding at the Edge |
Beschreibung: | Due to the growing demand for video streaming services, providers have to deal with increasing resource requirements for increasingly heterogeneous environments. To mitigate this problem, many works have been proposed which aim to (i) improve cloud/edge caching efciency, (ii) use computation power available in the cloud/edge for on-the-y transcoding, and (iii) optimize the trade-off among various cost parameters, e.g., storage, computation, and bandwidth. In this paper, we propose LwTE, a novel Light-weight Transcoding approach at the Edge, in the context of HTTP Adaptive Streaming (HAS). During the encoding process of a video segment at the origin side, computationally intense search processes are going on. The main idea of LwTE is to store the optimal results of these search processes as metadata for each video bitrate and reuse them at the edge servers to reduce the required time and computational resources for on-the-y transcoding. LwTE enables us to store only the highest bitrate plus corresponding metadata (of very small size) for unpopular video segments/bitrates. In this way, in addition to the signicant reduction in bandwidth and storage consumption, the required time for on-the-y transcoding of a requested segment is remarkably decreased by utilizing its corresponding metadata; unnecessary search processes are avoided. Popular video segments/bitrates are being stored.We investigate our approach for Video-on-Demand (VoD) streaming services by optimizing storage and computation (transcoding) costs at the edge servers and then compare it to conventional methods (store all bitrates, partial transcoding). The results indicate that our approach reduces the transcoding time by at least 80% and decreases the aforementioned costs by 12% to 70% compared to the state-of-the-art approaches. |
Schlagworte: | Video streaming, transcoding, video on demand, edge computing |
Typ: | Gastvortrag |
Homepage: | https://networks.imdea.org/whatsnew/events-agenda/lwte-light-weight-transcoding-at-the-edge/ |
Veranstaltung: | - |
Datum: | 09.12.2021 |
Vortragsstatus: | stattgefunden (online) |
Ort: | Madrid |
Staat: | Spanien |
Beteiligte
Alireza Erfanian (intern) |
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Hadi Amirpourazarian (intern) |
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Farzad Tashtarian (intern) |
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Christian Timmerer (intern) |
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Hermann Hellwagner (intern) |
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Zuordnung
Organisation | Adresse | ||||
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Fakultät für Technische Wissenschaften
Institut für Informationstechnologie
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AT - 9020 Klagenfurt am Wörthersee |
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Kooperationen
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IMDEA Networks Institute
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ES - 28918 Leganés, Madrid |
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