US 2014/0177890 A1 · Frequency Based Feedback Control

Abstract

Disclosed herein is a feedback reduction system for used in a hearing prosthesis. The hearing prosthesis will receive an input signal, process the input signal, and create a transformed output. However, the hearing prosthesis may suffer from feedback. Thus, a system to minimize the feedback in a hearing prosthesis may be desirable. One system to minimize the feedback includes down-sample circuitry configured to down-sample a first signal, creating a down-sampled signal. They system also includes a filter circuit. The filter circuit filters both the first signal and the down-sampled signal. The filter will output a filtered signal and a filtered down-sampled signal, respectively. Additionally, the system features up-sample circuitry that up-samples the filtered down-sampled signal. The output of the up-sample circuitry is an up-sampled signal. Further, the system features combining circuitry that creates a feedback-reduced signal based on the up-sampled signal, the filtered signal, and an input signal.

Claims25

Dependent claims

A signal processing system, the system comprising:

a filter with a fixed number of output taps;
first processing circuitry configured to provide one or the other of two signals, the signals including first and second signals, to an input of the filter, the first processing circuitry further configured to generate the first signal by altering the bandwidth of the second signal, wherein the second signal is an output of the signal processing system;
and
combining circuitry configured to generate a processed signal from an input signal to the combining circuitry based on an output of the filter.

1 more element

Dependencies are inferred from the claim text.

Frequency Based Feedback Control

Life of this patent

Frequency Based Feedback Control

Life of this patent

Abstract

Claims25