arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.12557eess.AScs.SD
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复音音频事件检测:多标签还是多类多任务分类问题?

Polyphonic audio event detection: multi-label or multi-class multi-task classification problem?

Queen Mary University of London(伦敦玛丽女王大学);The Alan Turing Institute(艾伦·图灵研究所);Nanyang Technological University(南洋理工大学)

Huy Phan, Thi Ngoc Tho Nguyen, Philipp Koch, Alfred Mertins

摘要:

多音事件是音频事件检测(AED)系统的主要误差源。在深度学习背景下,处理事件重叠的最常见方法是将AED任务视为多标签分类问题。通过这样做,我们固有地考虑多个一对。剩余分类问题,由单个(即共享)网络共同解决。在这项工作中,为了更好地处理复调混合物,我们建议将任务视为多类分类问题,将每个可能的标签组合视为一类。为了避免大量出现的类,由于组合爆炸,我们分为多个组的事件类别,并构造一个多任务问题,在一个分治的方式,其中每个任务是一个多类分类问题。然后设计了一个多类多任务建模的网络架构。该网络由一个主干子网和多个特定任务子网组成。任务特定的神经网络被设计为学习时频和信道注意力掩模,以从主干学习的公共特征图中提取当前任务的特征。在具有高度事件重叠的TUT-SED-Synthetic-2016上的实验表明,所提出的方法比常见的多标记方法具有更好的性能。

英文摘要:

Polyphonic events are the main error source of audio event detection (AED) systems. In deep-learning context, the most common approach to deal with event overlaps is to treat the AED task as a multi-label classification problem. By doing this, we inherently consider multiple one-vs.-rest classification problems, which are jointly solved by a single (i.e. shared) network. In this work, to better handle polyphonic mixtures, we propose to frame the task as a multi-class classification problem by considering each possible label combination as one class. To circumvent the large number of arising classes due to combinatorial explosion, we divide the event categories into multiple groups and construct a multi-task problem in a divide-and-conquer fashion, where each of the tasks is a multi-class classification problem. A network architecture is then devised for multi-class multi-task modelling. The network is composed of a backbone subnet and multiple task-specific subnets. The task-specific subnets are designed to learn time-frequency and channel attention masks to extract features for the task at hand from the common feature maps learned by the backbone. Experiments on the TUT-SED-Synthetic-2016 with high degree of event overlap show that the proposed approach results in more favorable performance than the common multi-label approach.

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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