Signal dereverberation using environment information
AssigneeOticon A/S
InventorJesper JENSEN
Life of this patent
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Abstract
An audio processing system includes an audio processing device and an external device, the audio processing device having a signal processing unit adapted for running an algorithm for processing an input signal representing an acoustic signal from the environment of the user and providing a processed output signal. The external device includes in an information signal a measure, characteristic of the reverberation of the room or location where the audio processing device is located, and the audio processing device is adapted to extract the measure of the reverberation from the information signal and use the measure as an input to an algorithm that includes a directional algorithm for providing a directional characteristic of the input signal.
Claims22
An audio processing system comprising an audio processing device and an external device, the audio processing device comprising a signal processing unit adapted for running an algorithm for processing an input signal representing an acoustic signal from the environment of the user and providing a processed output signal, the audio processing device and the external device comprising a wireless interface adapted to allow the external device to transmit an information signal and the audio processing device to receive the information signal, wherein
- the external device is adapted to include in the information signal a measure, characteristic of the reverberation of the room or location where the audio processing device is located, and the audio processing device is adapted to extract said measure of the reverberation from the information signal and use the measure as an input to said algorithm, wherein the algorithm comprises a directional algorithm for providing a directional characteristic of the input signal, the directional algorithm being adapted to provide that the directional characteristic is the more focused in a direction of a target sound source, the larger the value of the measure of the reverberation of the room.
A method of operating an audio processing system comprising an audio processing device adapted for processing an input signal and providing a processed output signal, and an external device, the audio processing device and the external device comprising a wireless interfaces adapted to allow the external device to transmit an information signal and the audio processing device to receive said information signal, respectively, the method comprising
- providing in an external device a measure, characteristic of the reverberation of a room or location where the external device and/or the audio processing device is located;
- providing and transmitting an information signal comprising the measure, characteristic of reverberation from the external device;
- receiving the information signal from the external device in the audio processing device and extracting the measure characteristic of reverberation therefrom;
- using the measure characteristic of reverberation in a processing algorithm of the audio processing device to process the input signal;
- providing that the algorithm comprises a directional algorithm for providing a directional characteristic of the input signal, and that the directional algorithm is adapted to provide that the directional characteristic is the more focused in a direction of a target sound source, the larger the value of the measure of the reverberation of the room.
Dependencies are inferred from the claim text.