8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

Noise Robust Voice Activity Detection Based on Switching Kalman Filter

Masakiyo Fujimoto, Kentaro Ishizuka

NTT Corporation, Japan

This paper addresses the problem of voice activity detection (VAD) in noisy environments. The VAD method proposed in this paper is based on a statistical model approach, and estimates statistical models sequentially without a priori knowledge of noise. Namely, the proposed method constructs a clean speech / silence state transition model beforehand, and sequentially adapts the model to the noisy environment by using a switching Kalman filter when a signal is observed. The evaluation is carried out by using a VAD evaluation framework, CENSREC-1-C. The evaluation results revealed that the proposed method significantly outperforms the baseline results of CENSREC-1-C as regards VAD accuracy in real environments.

Full Paper

Bibliographic reference.  Fujimoto, Masakiyo / Ishizuka, Kentaro (2007): "Noise robust voice activity detection based on switching kalman filter", In INTERSPEECH-2007, 2933-2936.