On the Feasibility of Video Streaming through Underwater Acoustic Links
On the Feasibility of Video Streaming through Underwater Acoustic Links
复制标题
水下声学链路视频流的可行性
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Zorzi
中科院分区：
文献类型：
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作者：
Filippo Campagnaro;Roberto Francescon;Davide Tronchin;M. Zorzi
目前，视频IP流量占全球互联网流量的73%，预计到2021年将达到82%。虽然通过同轴电缆、光纤和无线电链路等媒体进行的实时视频流已经成熟，但通过水声通信进行的实时视频流仍处于起步阶段。水下直播的不发达主要是由于声信道的不稳定性和传播延时长。前者对达到所需的比特率能力造成了一些障碍，而后者导致不可忽略的视频延迟，与发射器和接收器之间的距离成正比。尽管存在这些障碍，人们还是对先进的视频编解码器进行了大量的研究，以降低视频流所需的比特率。此外，调制解调器制造商最近开发了短距离高速率声学调制解调器。本研究提出了一项基于当前商用声学调制解调器的最佳视频编解码器（H.264/MPEG-AVC， H.265/MPEG-HEVC和VP9）的实时视频流的可行性研究。可行性评估已通过最后的池测试得到验证，其中视频已成功地使用真实的声学调制解调器进行流媒体传输。
Nowadays video IP traffic accounts for 73% of the entire global Internet traffic with forecasts up to 82% by 2021 [1]. While live video streaming is already mature through media such as coaxial cables, optical fibers and radio links, real-time live video streaming through underwater acoustic communication is still in its infancy. The underdevelopment of underwater live streaming is due to both the unstable nature and the long propagation delay of the acoustic channel. The former poses several obstacles to reaching the needed bitrate capabilities, while the latter causes a non-negligible video latency proportional to the distance between transmitter and receiver. Despite these obstacles, a lot of research on advanced video codecs is conducted to reduce the required bitrates of a video stream. In addition, modem manufactures recently developed short range high rate acoustic modems.This work presents a feasibility study of a live video streaming based on the best performing video codecs (H.264/MPEG-AVC, H.265/MPEG-HEVC and VP9) through current commercial acoustic modems. The feasibility evaluation has been proved with a final pool test, where the video has been successfully streamed with real acoustic modems.