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JACIII Vol.27 No.1 pp. 54-63
doi: 10.20965/jaciii.2023.p0054
(2023)

Research Paper:

Speech-Section Extraction Using Lip Movement and Voice Information in Japanese

Etsuro Nakamura*, Yoichi Kageyama*,†, and Satoshi Hirose**

*Graduate School of Engineering Science, Akita University
1-1 Tegata Gakuen-Machi, Akita 010-8502, Japan

**Japan Business Systems, Inc.
1-23-1 Toranomon, Minato-ku, Tokyo 105-6316, Japan

Corresponding author

Received:
November 29, 2021
Accepted:
August 10, 2022
Published:
January 20, 2023
Keywords:
speech-section extraction, lips, face extraction, speaker identification, omnidirectional camera
Abstract
Speech-Section Extraction Using Lip Movement and Voice Information in Japanese

The speech-section extraction method

In recent years, several Japanese companies have attempted to improve the efficiency of their meetings, which has been a significant challenge. For instance, voice recognition technology is used to considerably improve meeting minutes creation. In an automatic minutes-creating system, identifying the speaker to add speaker information to the text would substantially improve the overall efficiency of the process. Therefore, a few companies and research groups have proposed speaker estimation methods; however, it includes challenges, such as requiring advance preparation, special equipment, and multiple microphones. These problems can be solved by using speech sections that are extracted from lip movements and voice information. When a person speaks, voice and lip movements occur simultaneously. Therefore, the speaker’s speech section can be extracted from videos by using lip movement and voice information. However, when this speech section contains only voice information, the voiceprint information of each meeting participant is required for speaker identification. When using lip movements, the speech section and speaker position can be extracted without the voiceprint information. Therefore, in this study, we propose a speech-section extraction method that uses image and voice information in Japanese for speaker identification. The proposed method consists of three processes: i) the extraction of speech frames using lip movements, ii) the extraction of speech frames using voices, and iii) the classification of speech sections using these extraction results. We used video data to evaluate the functionality of the method. Further, the proposed method was compared with state-of-the-art techniques. The average F-measure of the proposed method is determined to be higher than that of the conventional methods that are based on state-of-the-art techniques. The evaluation results showed that the proposed method achieves state-of-the-art performance using a simpler process compared to the conventional method.

Cite this article as:
E. Nakamura, Y. Kageyama, and S. Hirose, “Speech-Section Extraction Using Lip Movement and Voice Information in Japanese,” J. Adv. Comput. Intell. Intell. Inform., Vol.27, No.1, pp. 54-63, 2023.
Data files:
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Last updated on Feb. 08, 2023