arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2607.04463cs.SD
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用于对具有部分标记评估数据集的音频分类系统进行稳健评估的采样偏差补偿

Sampling Bias Compensation for Robust Evaluation of Audio Classification Systems with Partially Labeled Evaluation Datasets

Instituto Tecnologico de Informatica (ITI)(信息技术研究所);Tampere University(塔尔库大学)

Javier Naranjo-Alcazar, Annamaria Mesaros, Tuomas Virtanen, Pedro Zuccarello

AI总结:

研究在严格标注预算约束下补偿评估标记子集偏差的方法,通过实现并比较三种密度比估计方法,利用主动学习技术生成标记子集进行实验,表明重要性加权能给出更现实准确度估计。

摘要:

声学机器学习系统的性能通常用完全标注的测试集评估。但实际部署中,标记大量连续收集的音频数据往往不可行,常依赖小的标记子集,导致采样偏差。本文研究在严格标注预算约束下补偿评估标记子集偏差的方法,探讨重要性加权技术能否减轻差异,实现并比较三种密度比估计方法,实验表明重要性加权能给出更现实的准确度估计。

英文摘要:

The performance of acoustic machine learning systems is commonly evaluated using fully annotated test sets. In real-world deployments, however, exhaustively labeling large volumes of continuously collected audio data is often infeasible. Consequently, performance assessment typically relies on a small labeled subset of the available data, introducing a sampling bias that can severely distort evaluation metrics. This paper studies methods for compensating the bias in evaluation-labeled subsets under strict annotation-budget constraints. We study whether importance weighting techniques can mitigate this discrepancy by compensating for the selection bias. Specifically, we implement and compare three density-ratio estimation methods: kernel density estimation (KDE), logistic regression, and k-nearest neighbors (kNN), utilizing feature-space representations of the deployed audio. To emulate realistic deployment scenarios, the labeled subsets are generated using five distinct sampling strategies based on active learning techniques. Experiments conducted on an audio scene classification (ASC) benchmark demonstrate that importance weighting consistently yields more realistic accuracy estimates, significantly reducing the gap between subset-based metrics and the true evaluation performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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