Patent ID: 7459962
Filing Date: 2008-12-02
Classification: G10L,H03H

Abstract:
1. A method for forming a filter for detecting transients in an input signal, in which a transient detection threshold of said filter is not influenced by the presence of transients in said input signal, the method comprising: determining a power spectral estimate (PSE) signal of at least a predetermined bandwidth portion of said input signal, the PSE signal including background noise forming a noise floor for said input signal, and the predetermined bandwidth portion of said input signal having a bandwidth that is generally in accordance with a bandwidth of a transient signal to be detected; using a sorting subsystem and an averaging circuit to analyze said PSE signal over said predetermined bandwidth portion to obtain an average PSE magnitude value for said PSE signal within a preselected portion of said predetermined bandwidth; and using said average PSE magnitude value for a transient detection threshold, so that said transients present in said predetermined bandwidth portion of said input signal that have a magnitude above said transient detection threshold are detectable without influencing said transient detection threshold.