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JRM Vol.29 No.1 pp. 114-124
doi: 10.20965/jrm.2017.p0114
(2017)

Paper:

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Ego-Noise Suppression for Robots Based on Semi-Blind Infinite Non-Negative Matrix Factorization

Kazuhiro Nakadai*,**, Taiki Tezuka*, and Takami Yoshida*

*Graduate School of Information Science and Engineering, Tokyo Institute of Technology
2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan

**Honda Research Institute Japan Co., Ltd.
8-1 Honcho, Wako-shi, Saitama 351-0188, Japan

Received:
July 27, 2016
Accepted:
November 30, 2016
Published:
February 20, 2017
Creative Commons License
Keywords:
robot audition, ego-noise suppression, non-parametric Bayesian
Abstract
This paper addresses ego-motion noise suppression for a robot. Many ego-motion noise suppression methods use motion information such as position, velocity, and the acceleration of each joint to infer ego-motion noise. However, such inferences are not reliable, since motion information and ego-motion noise are not always correlated. We propose a new framework for ego-motion noise suppression based on single channel processing using only acoustic signals captured with a microphone. In the proposed framework, ego-motion noise features and their numbers are automatically estimated in advance from an ego-motion noise input using Infinite Non-negative Matrix Factorization (INMF), which is a non-parametric Bayesian model that does not use explicit motion information. After that, the proposed Semi-Blind INMF (SB-INMF) is applied to an input signal that consists of both the target and ego-motion noise signals. Ego-motion noise features, which are obtained with INMF, are used as inputs to the SB-INMF, and are treated as the fixed features for extracting the target signal. Finally, the target signal is extracted with SB-INMF using these newly-estimated features. The proposed framework was applied to ego-motion noise suppression on two types of humanoid robots. Experimental results showed that ego-motion noise was effectively and efficiently suppressed in terms of both signal-to-noise ratio and performance of automatic speech recognition compared to a conventional template-based ego-motion noise suppression method using motion information. Thus, the proposed method worked properly on a robot without a motion information interface.*
* This work is an extension of our publication “Taiki Tezuka, Takami Yoshida, Kazuhiro Nakadai: Ego-motion noise suppression for robots based on Semi-Blind Infinite Non-negative Matrix Factorization, ICRA 2014, pp.6293-6298, 2014.”
Ego-noise suppression achieves speech recognition even during motion

Ego-noise suppression achieves speech recognition even during motion

Cite this article as:
K. Nakadai, T. Tezuka, and T. Yoshida, “Ego-Noise Suppression for Robots Based on Semi-Blind Infinite Non-Negative Matrix Factorization,” J. Robot. Mechatron., Vol.29 No.1, pp. 114-124, 2017.
Data files:
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Last updated on Sep. 09, 2024