8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Parametric Multi-Band Automatic Gain Control for Noisy Speech Enhancement

M. Stolbov, S. Koval, M. Khitrov

Speech Technology Center, Russia

This report is devoted to a new approach to wide band non-stationary noise reduction and corrupted speech signal enhancement. The objective is to provide processed speech intelligibility and quality while maintaining computation simplicity. We present a new (non-subtractive) noise suppression method called multi-band Automatic Gain Control (AGC). The proposed method is based on the introduction of a non-subtractive noise suppression model and multi band filter gain control. This model provides less residual noise and better speech quality over the Spectral Subtraction Method (SSM). Modification of multi-band AGC gain function allows easy introduce new useful feature called Spectral Contrasting. The report contains the discussion of AGC control parameters values. Experiments show that the proposed algorithms are effective in non-stationary noisy background for Signal-to-Noise Ratio (SNR) up to -6dB.

Full Paper

Bibliographic reference.  Stolbov, M. / Koval, S. / Khitrov, M. (2003): "Parametric multi-band automatic gain control for noisy speech enhancement", In EUROSPEECH-2003, 561-564.