Using a High-Speed Video Camera for Robust Audio-Visual Speech Recognition in Acoustically Noisy Conditions

摘要

The purpose of this study is to develop a robust audio-visual speech recognition system and to investigate the influence of a high-speed video data on the recognition accuracy of continuous Russian speech under different noisy conditions. Developed experimental setup and collected multimodal database allow us to explore the impact brought by the high-speed video recordings with various frames per second (fps) starting from standard 25 fps up to high-speed 200 fps. At the moment there is no research objectively reflecting the dependence of the speech recognition accuracy from the video frame rate. Also there are no relevant audio-visual databases for model training. In this paper, we try to fill in this gap for continuous Russian speech. Our evaluation experiments show the increase of absolute recognition accuracy up to 3% and prove that the use of the high-speed camera JAI Pulnix with 200 fps allows achieving better recognition results under different acoustically noisy conditions.