Summary

Based on a two-tier network architecture, large-scale NVR high-definition video systems are constructed by aggregating dedicated networks, fiber-optic networks, and public service networks into the primary network. Industrial-grade NVRs are used to provide storage and forwarding services for the primary network while enabling redundant security backups for the video surveillance system. This distributed multi-level architecture with centralized backend management significantly enhances the overall functionality and fault tolerance of the video surveillance system.