A novel Key Quality Indicator for video delivery applications, XLR (piXel Loss Rate), is defined, characterized, and evaluated. The proposed indicator is an objective measure that captures the effects of transmission errors in the received video, has a good correlation with subjective Mean Opinion Scores, and provides comparable results with state-of-the-art Full-Reference metrics. Moreover, XLR can be estimated using only a lightweight analysis on the compressed bitstream, thus allowing a No-Reference operational method. Therefore, XLR can be used for measuring the quality of experience without latency at any network location. Thus, it is a relevant tool for network planning, specially in new high-demanding scenarios. The experiments carried out show the outstanding performance of its linear-dimension score and the reliability of the bitstream-based estimation.

中文翻译：

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XLR（像素丢失率）：衡量 IP 网络中视频 QoE 的轻量级指标

定义、表征和评估了一种用于视频传输应用的新型关键质量指标 XLR（像素丢失率）。提议的指标是一种客观衡量标准，它捕捉接收视频中传输错误的影响，与主观平均意见得分具有良好的相关性，并提供与最先进的完整参考指标的可比结果。此外，可以仅使用对压缩比特流的轻量级分析来估计 XLR，从而允许使用无参考操作方法。因此，XLR 可用于测量任何网络位置的无延迟体验质量。因此，它是网络规划的相关工具，特别是在新的高要求场景中。