PSTile: Perception-Sensitivity-Based 360 degrees Tiled Video Streaming for Industrial Surveillance

360 degrees video becomes increasingly attractive in smart factories due to its immersive experience for industrial surveillance. However, transmitting this kind of video requires a fairly large demand on the bandwidth due to its high-resolution and panoramic view. Moreover, low-latency responses of the video to users' head movements are required. This leads to the tradeoff between high video quality and low-latency response under limited bandwidth in factories. This article proposes a perception-sensitivity (PS)based 360 degrees tiled video streaming method called PSTile for industrial surveillance. Specifically, a PS tiling strategy is constructed for valid tile grouping based on the designed PS index. Then, a tile bitrate adaptation problem is formulated to allocate bitrates to valid tiles. It jointly optimizes surveillance accuracy, end-to-end latency, and quality-of-experience of users under accuracy, latency, and bandwidth constraints. Simulations demonstrate that PSTile achieves at least 32.6% lower end-to-end latency and 19.3% higher average video bitrate than grid-tiling and clus-tiling methods.

Automated summary

360 degrees video is attractive for industrial surveillance in smart factories due to its immersive experience. However, transmitting this video requires a large bandwidth due to its high-resolution and panoramic view. This article proposes a perception-sensitivity-based tiled video streaming method called PSTile for industrial surveillance. It optimizes surveillance accuracy, end-to-end latency, and quality-of-experience under accuracy, latency, and bandwidth constraints. Simulations show that PSTile achieves lower latency and higher video bitrate compared to other methods.