Kalman filtering based speech enhancement using a codebook based approach

A hearing device for enhancing speech intelligibility, the hearing device comprising:

• an input transducer for providing an input signal comprising a speech signal and a noise signal;
• a processing unit;
• an acoustic output transducer coupled to the processing unit;
• wherein the processing unit is configured to determine one or more parameters based on a codebook based approach (CBA) processing;
• wherein the processing unit is configured to perform Kalman filtering based on the input signal and the one or more parameters to provide an output signal having an enhanced speech intelligibility;
• wherein the acoustic output transducer is configured to provide an audio output signal for hearing by a user of the hearing device based on the output signal with enhanced speech intelligibility;
• and
• wherein the one or more parameters comprise one or more predictor parameters, and wherein the Kalman filtering is performed based on the one or more predictor parameters.

A hearing device for enhancing speech intelligibility, the hearing device comprising:

• an input transducer for providing an input signal comprising a speech signal and a noise signal;
• a processing unit;
• an acoustic output transducer coupled to the processing unit;
• wherein the processing unit is configured to determine one or more parameters based on a codebook based approach (CBA) processing;
• wherein the processing unit is configured to perform Kalman filtering based on the input signal and the one or more parameters to provide an output signal having an enhanced speech intelligibility;
• wherein the acoustic output transducer is configured to provide an audio output signal for hearing by a user of the hearing device based on the output signal with enhanced speech intelligibility;
• and
• wherein the processing unit is configured to automatically select a codebook for the codebook based approach (CBA) processing from a plurality of available codebooks, and wherein the processing unit is configured to automatically select the codebook based on a spectra of the input signal and/or based on a measurement of objective intelligibility for each of the available codebooks.

A method for enhancing speech intelligibility in a hearing device, the method comprising:

• providing an input signal comprising a speech signal and a noise signal;
• determining, using a processing unit, one or more parameters of the input signal based on a codebook based approach (CBA) processing;
• performing, using the processing unit, Kalman filtering based on the input signal and the one or more parameters to generate an output signal that has an enhanced speech intelligibility;
• and
• providing an audio output signal by an acoustic output transducer for hearing by a user of the hearing device based on the output signal.