Self-Supervised Predictive Learning: A Negative-Free Method for Sound Source Localization in Visual Scenes

• URL: http://arxiv.org/abs/2203.13412v1
• Date: Fri, 25 Mar 2022 01:42:42 GMT
• Title: Self-Supervised Predictive Learning: A Negative-Free Method for Sound Source Localization in Visual Scenes
• Authors: Zengjie Song, Yuxi Wang, Junsong Fan, Tieniu Tan, Zhaoxiang Zhang
• Abstract summary: Self-Supervised Predictive Learning (SSPL) is a negative-free method for sound localization via explicit positive mining. SSPL achieves significant improvements of 8.6% cIoU and 3.4% AUC on SoundNet-Flickr compared to the previous best.
• Score: 91.59435809457659
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Sound source localization in visual scenes aims to localize objects emitting the sound in a given image. Recent works showing impressive localization performance typically rely on the contrastive learning framework. However, the random sampling of negatives, as commonly adopted in these methods, can result in misalignment between audio and visual features and thus inducing ambiguity in localization. In this paper, instead of following previous literature, we propose Self-Supervised Predictive Learning (SSPL), a negative-free method for sound localization via explicit positive mining. Specifically, we first devise a three-stream network to elegantly associate sound source with two augmented views of one corresponding video frame, leading to semantically coherent similarities between audio and visual features. Second, we introduce a novel predictive coding module for audio-visual feature alignment. Such a module assists SSPL to focus on target objects in a progressive manner and effectively lowers the positive-pair learning difficulty. Experiments show surprising results that SSPL outperforms the state-of-the-art approach on two standard sound localization benchmarks. In particular, SSPL achieves significant improvements of 8.6% cIoU and 3.4% AUC on SoundNet-Flickr compared to the previous best. Code is available at: https://github.com/zjsong/SSPL.

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