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US 6,650,124 B2Granted
Method for checking an occurrence of a signal component and device to perform the method
AssigneePhonak AG
InventorHans-Ueli Roeck
Life of this patent
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AssigneePhonak AG
InventorHans-Ueli Roeck
Estimating the term…
In order to check an occurrence of a signal component in an input signal, a method and a device is provided. The method comprises the steps of generating a measure for the frequency of the input signal from the input signal, determining a variance of the measure for the frequency of the input signal, comparing the determined variance with a predetermined limit value, and confirming the occurrence of the signal components if the variance lies within a predetermined range in relation to the predetermined limit value. The occurrence of a signal component in an input signal can be determined very fast and by performing only a few steps. Therefore, the method according to the invention and the device according to the invention can very well be used in particular in mobile devices, as for example in hearing devices.
A method for checking an occurrence of a signal component in an input signal, whereas the method comprises the steps of
A device, comprising an estimator unit fed by an input signal to determine a measure for the frequency of an input signal and a variances unit being fed by the measure for the frequency of the input signal, the output signal of the variances unit is operationally coupled to the comparator unit, whereas the comparator unit being further fed by a predetermined limit value, a coefficient calculation unit for the calculation of filter coefficients being fed by the measure for the frequency of the input signal, whereas the filter coefficients being transferable to the filter unit, which is on its input side connected with the input signal and which is connected on its output side with a first switch contact of a switching unit, whereas the input signal is fed to a second switch contact of the switching unit and that an output signal of the comparator unit is generating a control signal for the switching unit, whereby either the input signal or the output signal of the filter unit is switchable on the output of the switching unit.
Dependencies are inferred from the claim text.