Methods and Apparatus for Dynamic Low Frequency Noise Suppression

摘要

Methods and apparatus for dynamically suppressing low frequency non-speech audio events, such as road bumps, without suppressing speech formants. In exemplary embodiments of the invention, maximum powers in first and second windows are computed and used to determine whether dampening should be applied, and if so, to what extent.

主权项

1. A method, comprising:
receiving an input signal; forming a first window of the input signal spanning a first frequency range; forming a second window of the input signal having a second frequency range adjacent to the first frequency range; determining information on any signal peaks in the first and second windows; computing, using a computer processor, a dampening level from the information on the signal peaks in the first and second windows; and adjusting sizes of the first and second windows until a final dampening level is determined for dynamically suppressing non-speech audio events in the input signal.