期刊
IEEE TRANSACTIONS ON BROADCASTING
卷 68, 期 3, 页码 609-619出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBC.2022.3157470
关键词
Omnidirectional video; tiled streaming; adaptive video delivery; MPEG-DASH SRD; scalable video encoding
资金
- European Union Horizon 2020 Project NEWTON [688503]
- Slovak KEGA Agency [015STU-4/2021]
- Science Foundation Ireland (SFI) [12/RC/2289_P2]
This paper presents a novel algorithm for omnidirectional video delivery, utilizing spatial tiling and multiple tiling schemes to achieve bandwidth savings and adaptation latency reduction. The proposed algorithm reduces network bandwidth requirements to about 30% of the original value with a low processing latency of 70.87 ms.
Omnidirectional video is becoming increasingly popular among viewers, but its delivery requires considerable amount of network bandwidth. Today's streaming services are transmitting the full spatial angle of omnidirectional videos, although most of the transmitted content is not utilized. Due to both limited bandwidth availability and its dynamic fluctuations, adaptive delivery solutions play a key role in supporting high user quality streaming of omnidirectional videos. This paper describes research which extends the MPEG-DASH Spatial Relationship Description by adding scalable video encoding to spatial tiling. It proposes a novel tile-layering based gaze adaptation algorithm for omnidirectional video delivery and employs it in conjunction with multiple tiling schemes. The benefits of the proposed algorithm with diverse tiling schemes are evaluated objectively in terms of bandwidth savings and adaptation latency. The results show a reduction of network bandwidth requirements to about 30% of the original bandwidth value with a low processing latency of 70.87 ms.
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