Hearing device and method for operating a hearing device with two-stage transformation
AssigneeSiemens Medical Instruments Pte. Ltd.
InventorsTimo Gerkmann, Rainer Martin, Henning Puder, Wolfgang Soergel
Life of this patent
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Abstract
A filter bank with a sufficiently high resolution for amplification and noise reduction and with the lowest possible computational complexity is provided for a hearing device and, in particular, for a hearing aid. Two-stage frequency transformation with little latency is therefore proposed for hearing aids. Some of the processing, for example the amplification, is carried out after high stopband attenuation in the first stage. An increased frequency resolution is achieved in a second stage before the back-transformation in the first stage, which is favorable for noise reduction, for example.
Claims12
A method of operating a hearing device, the method which comprises:
- segmenting and transforming an input signal of the hearing device in a first transformation stage to form a multichannel first-stage transformation signal;
- segmenting and transforming the multichannel first-stage transformation signal in a second transformation stage to form a multichannel second-stage transformation signal;
- processing the multichannel second-stage transformation signal to form a processed multichannel signal;
- forming a first-stage signal by either:
- a) back-transforming the processed multichannel signal in the second transformation stage and assembling a resultant multichannel signal to form the first-stage signal;
- or
- b) determining a time domain filter function from the processed multichannel signal and filtering the multichannel first-stage transformation signal to form the first-stage signal;
- subjecting the first-stage signal to multichannel processing to form a multichannel first-stage processed signal;
- and
- transforming back the multichannel first-stage processed signal in the first transformation stage and assembling a resultant multichannel signal to form an output signal.
A hearing device, comprising:
- an input configured to receive an input signal of the hearing device;
- a first transformation device connected to receive the input signal) and configured for segmenting and transforming the input signal in a first transformation stage to form a multichannel first-stage transformation signal;
- and
- a second transformation device connected to receive the multichannel first-stage transformation signal and configured for segmenting and transforming the multichannel first-stage transformation signal in a second transformation stage to form a multichannel second-stage transformation signal;
- and
- a second processing device connected to receive the multichannel second-stage transformation signal and configured for processing the multichannel second-stage transformation signal;
- and
- a) a second back-transformation device for transforming back the processed multichannel signal in the second transformation stage and assembling a resultant multichannel signal to form a first-stage signal;
- or
- b) a filter device for determining a time domain filter function from the processed multichannel signal and filtering the multichannel first-stage transformation signal to form the first-stage signal;
- and
- a first processing device for subjecting the first-stage signal to multichannel processing to form a multichannel first-stage processed signal;
- and
- a first back-transformation device connected to receive the multichannel first-stage processed signal and configured for transforming back the multichannel first-stage processed signal in said first transformation stage and assembling a resultant multichannel signal to form an output signal.
Dependencies are inferred from the claim text.