Patent ID: 8244526
Filing Date: 2012-08-14
Classification: G10L

Abstract:
1. A method of signal processing, said method comprising performing each of the following acts within a device that is configured to process audio signals: calculating a first burst indication signal that indicates whether a burst is detected in a low-frequency portion of a speech signal; calculating a second burst indication signal that indicates whether a burst is detected in a high-frequency portion of the speech signal; generating an attenuation control signal according to a relation between the first and second burst indication signals; and applying the attenuation control signal to the high-frequency portion of the speech signal to produce a processed high-frequency signal portion, wherein calculating at least one of the first and second burst indication signals comprises: producing a forward smoothed envelope of a corresponding portion of the speech signal, the forward smoothed envelope being smoothed in a positive time direction; indicating an initial region of a burst in the forward smoothed envelope; producing a backward smoothed envelope of the corresponding portion of the speech signal, the backward smoothed envelope being smoothed in a negative time direction; and indicating a terminal region of a burst in the backward smoothed envelope.