VAR技术-测试手册（2026年1月） VAR技术 - 测试指南（2026年1月）

Investment Rating - The report does not provide a specific investment rating for the VAR technology industry Core Insights - The VAR technology is approved by the International Football Association Board (IFAB) to assist referees in correcting clear errors during matches, focusing on system setup, performance requirements, and operator training [4] - A research project was conducted to establish objective testing methods for VAR systems, identifying key technical areas and challenges related to encoding, decoding, synchronization, and image processing [5][9] - The report outlines three critical performance requirements for VAR systems: video stream synchronization, acceptable delay levels, and objective video quality assessment [10][11] Summary by Sections Introduction - VAR technology supports referees in specific situations, and the quality plan developed by FIFA includes testing and certification schemes focusing on performance requirements [4] Background and Methodology - The research aimed to quantify technical factors and set limits for VAR systems, identifying challenges in synchronization and image quality [5][9] Testing and Evaluation Synchronization Testing - VAR providers must ensure camera angles are synchronized, especially for offside decisions, using deliberately unsynchronized video signals for testing [14] - The evaluation process involves comparing recorded video signals to ensure any individual compensation value does not exceed three frames during a two-minute assessment [25][29] Delay Testing - The VAR system must maintain a three-second delay for real-time playback, ensuring minimal delay between live events and VAR signals [31] - The testing setup includes various cameras and recording devices to assess the delay accurately [33][35] Video Quality Testing - The final test ensures the video quality provided to VAR is adequate for assisting referees, using the VMAF algorithm for quality assessment [40][45] - Specific quality benchmarks are set for both 1080p and 1080i formats, requiring average VMAF scores to meet or exceed defined thresholds [47][48]