动态广告插入的触发时机、截止就绪性与事件对齐计费
Trigger Timing, Deadline Readiness, and Event-Aligned Accounting for Dynamic Ad Insertion
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- University of Notre Dame（圣母大学）
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中文总结 AI 辅助
本文通过事件账本、固定参考截止时间和播单级贡献计费，分离动态广告插入中的触发、触达与就绪性，并基于合成实验揭示不同定义对贡献对比的影响。
中文摘要 AI 辅助
动态广告插入的比较即使在算术上正确的情况下，也可能混淆触发、触达、就绪性、播放、可计费性和测量等事件。我们通过一个观察事件账本、一个候选不变的参考截止时间以及播单级贡献计费来分离这些事件。截止规则在候选分配之前固定，并测试一个可接受的转移状态是否仍然有效，而非准备是否仅仅提前完成。一种受限的单调播放表示阐述了媒体位置摘要何时足够；一个反例说明了它们在更广泛的路径类别上为何失效。一项离线合成研究在九个信息丰富的短生命周期条件和九个作为分析对照的长生命周期条件下测试了这些定义。在45,000个共享脚本中，两种触发策略共享强加的播放路径、延迟样本以及假设的价值和成本系数。播放头摘要显著错误分类了非单调混合中的触达事件，但在此网格中，两种捷径均未逆转贡献对比，因为在共享设计下某些错误相互抵消。用截止时间前的完成取代截止时间的有效性，在九个信息丰富条件中的三个（全部在三种延迟设置之一）逆转了比较。在实际观众到达时而非参考截止时间评分就绪性，会改变暂停路径的就绪性，但不改变任何贡献符号。这些结果是应用于既定错误分类机制的事件定义的后果。当记录缺失时，保守界限保留不确定性，工件记录了代码、种子、事件历史和检查程序。证据是合成的，不使用商业遥测，且不排名服务器端或服务器引导的插入。
英文摘要
Dynamic ad insertion comparisons can conflate trigger, reach, readiness, playback, billability and measurement even when the accounting is arithmetically correct. We separate these events with an observed-event ledger, a candidate-invariant reference deadline and pod-level contribution accounting. The deadline rule is fixed before candidate assignment and tests whether an admissible transition state remains valid, not whether preparation merely finished earlier. A restricted monotone-playback representation states when media-position summaries suffice; a counterexample shows why they fail over a wider path class. An offline synthetic study exercises the definitions over nine short-lifetime conditions informative for the readiness comparison and nine long-lifetime conditions serving as analytic controls. Across 45,000 shared scripts, two trigger policies share imposed playback paths, latency draws and hypothetical value and cost coefficients. Playhead summaries substantially misclassify reach events in the nonmonotone mixtures, yet neither shortcut reverses the contribution contrast in this grid, because some errors cancel under the shared design. Replacing validity at the deadline with completion by the deadline reverses the comparison in three of the nine informative conditions, all at one of the three latency settings. Scoring readiness at actual viewer arrival rather than at the reference deadline shifts pause-path readiness but changes no contribution sign. These outcomes are consequences of the event definitions applied to established misclassification mechanisms. Conservative bounds retain uncertainty when records are missing, and the artifact records code, seeds, event histories and checking procedures. The evidence is synthetic, uses no commercial telemetry, and ranks neither server-side nor server-guided insertion.
