FUN-SSL: Full-band Layer Followed by U-Net with Narrow-band Layers for Multiple Moving Sound Source Localization
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912600957124608 |
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| author | Choi, Yuseon Kim, Hyeonseung Jun, Jewoo Shin, Jong Won |
| author_facet | Choi, Yuseon Kim, Hyeonseung Jun, Jewoo Shin, Jong Won |
| contents | Dual-path processing along the temporal and spectral dimensions has shown to be effective in various speech processing applications. While the sound source localization (SSL) models utilizing dual-path processing such as the FN-SSL and IPDnet demonstrated impressive performances in localizing multiple moving sources, they require significant amount of computation. In this paper, we propose an architecture for SSL which introduces a U-Net to perform narrow-band processing in multiple resolutions to reduce computational complexity. The proposed model replaces the full-narrow network block in the IPDnet consisting of one full-band LSTM layer along the spectral dimension followed by one narrow-band LSTM layer along the temporal dimension with the FUN block composed of one Full-band layer followed by a U-net with Narrow-band layers in multiple scales. On top of the skip connections within each U-Net, we also introduce the skip connections between FUN blocks to enrich information. Experimental results showed that the proposed FUN-SSL outperformed previously proposed approaches with computational complexity much lower than that of the IPDnet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_17490 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | FUN-SSL: Full-band Layer Followed by U-Net with Narrow-band Layers for Multiple Moving Sound Source Localization Choi, Yuseon Kim, Hyeonseung Jun, Jewoo Shin, Jong Won Audio and Speech Processing Signal Processing Dual-path processing along the temporal and spectral dimensions has shown to be effective in various speech processing applications. While the sound source localization (SSL) models utilizing dual-path processing such as the FN-SSL and IPDnet demonstrated impressive performances in localizing multiple moving sources, they require significant amount of computation. In this paper, we propose an architecture for SSL which introduces a U-Net to perform narrow-band processing in multiple resolutions to reduce computational complexity. The proposed model replaces the full-narrow network block in the IPDnet consisting of one full-band LSTM layer along the spectral dimension followed by one narrow-band LSTM layer along the temporal dimension with the FUN block composed of one Full-band layer followed by a U-net with Narrow-band layers in multiple scales. On top of the skip connections within each U-Net, we also introduce the skip connections between FUN blocks to enrich information. Experimental results showed that the proposed FUN-SSL outperformed previously proposed approaches with computational complexity much lower than that of the IPDnet. |
| title | FUN-SSL: Full-band Layer Followed by U-Net with Narrow-band Layers for Multiple Moving Sound Source Localization |
| topic | Audio and Speech Processing Signal Processing |
| url | https://arxiv.org/abs/2509.17490 |