Looking into Your Speech: Learning Cross-modal Affinity for Audio-visual Speech Separation

International Conference
2021-07-01 17:05
Authors : Jiyoung Lee*, Soo-Whan Chung*, Sunok Kim, Hong-Goo Kang**, Kwanghoon Sohn**

Year : 2021

Publisher / Conference : CVPR

Research area : Audio-Visual, Source Separation

Presentation : Poster

In this paper, we address the problem of separating individual speech signals from videos using audio-visual neural processing. Most conventional approaches utilize frame-wise matching criteria to extract shared information between audio and video signals; thus, their performance heavily depends on the accuracy of audio-visual synchronization and the effectiveness of their representations. To overcome the frame discontinuity problem between two modalities due to transmission delay mismatch or jitter, we propose a cross-modal affinity network (CaffNet) that learns global correspondence as well as locally-varying affinities between audio and visual streams. Since the global term provides stability over a temporal sequence at the utterance-level, this also resolves a label permutation problem characterized by inconsistent assignments. By introducing a complex convolution network, CaffNet-C, that estimates both magnitude and phase representations in the time-frequency domain, we further improve the separation performance. Experimental results verify that the proposed methods outperform conventional ones on various datasets, demonstrating their advantages in real-world scenarios.

*Jiyoung Lee and Soo-Whan Chung contributed equally to this work.
**Hong-Goo Kang and Kwanghoon Sohn are co-corresponding authors.
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