Audiovisual Synchrony Detection with Optimized Audio Features

Sami Sieranoja (1) , Md Sahidullah (2) , Tomi Kinnunen (1) , Jukka Komulainen (3) , Abdenour Hadid (3)

1 University of Eastern Finland
2 MULTISPEECH - Speech Modeling for Facilitating Oral-Based Communication
3 University of Oulu

Audiovisual speech synchrony detection is an important part of talking-face verification systems. Prior work has primarily focused on visual features and joint-space models, while standard mel-frequency cepstral coefficients (MFCCs) have been commonly used to present speech. We focus more closely on audio by studying the impact of context window length for delta feature computation and comparing MFCCs with simpler energy-based features in lip-sync detection. We select state-of-the-art hand-crafted lip-sync visual features, space-time auto-correlation of gradients (STACOG), and canonical correlation analysis (CCA), for joint-space modeling. To enhance joint space modeling, we adopt deep CCA (DCCA), a nonlinear extension of CCA. Our results on the XM2VTS data indicate substantially enhanced audiovisual speech synchrony detection, with an equal error rate (EER) of 3.68%. Further analysis reveals that failed lip region localization and beard-edness of the subjects constitutes most of the errors. Thus, the lip motion description is the bottleneck, while the use of novel audio features or joint-modeling techniques is unlikely to boost lip-sync detection accuracy further.

Mots clés: Audiovisual Synchrony; Presentation Attack De-tection; Multimodal Processing; Feature Extraction; Mel-Frequency Cepstral Coefficients (MFCCs)

Domaines: Vision par ordinateur et reconnaissance de formes [cs.CV]; Multimédia [cs.MM]; Traitement du signal et de l'image [eess.SP]

Sami Sieranoja, Md Sahidullah, Tomi Kinnunen, Jukka Komulainen, Abdenour Hadid. Audiovisual Synchrony Detection with Optimized Audio Features. ICSIP 2018 - 3rd International Conference on Signal and Image Processing, Jul 2018, Shenzhen, China. ⟨hal-01889918⟩