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US 12,387,739 B2Granted
Loudspeaker system provided with dynamic speech equalization
AssigneeEPOS Group A/S
InventorsAnders Røser Hansen, Poul Peder Hestbek, Svend Feldt, Casper Fynsk
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Abstract
A method for speech equalization, comprising the steps of receiving an input audio signal, processing said input audio signal in dependence on frequency and to providing an equalized electric audio signal according to an equalization function, wherein said equalization function comprises at least an actuator part configured to dynamically applying a compensation filter to the received input signal and dynamically applying a transparent filter to the received input signal, and further transmitting an output signal perceivable by a user as sound representative of said electric acoustic input signal or a processed version thereof.
Claims21
A method for dynamic speech equalization, comprising:
- receiving an input audio signal;
- analyzing a characteristic of an input sample of the input audio signal relative to speech by applying two analysis filters in parallel to the input audio signal, and measuring an energy level of the output of each of the two filters, the two analysis filters having different frequency ranges, wherein one of the two analysis filters is a high pass filter with a cut-off frequency in the range of 1500 to 2500 Hz, and the other of the two analysis filters is a low pass filter with a cut-off frequency in the range of 400 to 600 Hz;
- utilizing at least one actuator filter, which receives the input audio signal in parallel with the two analysis filters, to apply a frequency adjustment on the same input sample of the input audio signal whose characteristic is being analyzed by application of the two analysis filters to produce an equalized electric audio signal, the frequency adjustment being dependent on the analyzed characteristic;
- and
- transmitting an output signal perceivable by a user as sound representative of said equalized audio signal or a processed version thereof.
2 more elements
A speakerphone comprising
- an audio interface to at least one of a microphone, a data communication channel, and a phone connection, the audio interface receiving an input audio signal with a first dynamic range of levels representative of a time and frequency variant sound signal, the input audio signal comprising a target signal and/or a noise signal and providing an electric audio input signal;
- a processor;
- a memory storing computer instructions which, when executed, cause the processor to perform a process comprising modifying said input audio signal in dependence on frequency and for providing an equalized electric audio signal according to an equalization function, wherein the equalization function comprises:
- analyzing a characteristic of an input sample of the input audio signal relative to speech by applying two analysis filters in parallel to the input audio signal, and measuring an energy level of the output of each of the two filters, the two analysis filters having different frequency ranges, wherein one of the two analysis filters is a high pass filter with a cut-off frequency in the range of 1500 to 2500 Hz, and the other of the two analysis filters is a low pass filter with a cut-off frequency in the range of 400 to 600 Hz, and
- utilizing at least one actuator filter, which receives the input audio signal in parallel with the two analysis filters, to apply a frequency adjustment on the same input sample of the input audio signal whose characteristic is being analyzed by application of the two analysis filters to produce an equalized electric audio signal, the frequency adjustment being dependent on the analyzed characteristic;
- and
- a loudspeaker for providing an output signal perceivable by a user as sound representative of said equalized electric audio signal or a processed version thereof.
4 more elements
A hearing device comprising
- an audio interface to at least one of a microphone, a data communication channel, and a phone connection, the audio interface receiving an input audio signal with a first dynamic range of levels representative of a time and frequency variant sound signal, the input audio signal comprising a target signal and/or a noise signal and providing an electric audio input signal;
- a processor;
- a memory storing computer instructions which, when executed, cause the processor to perform a process comprising modifying said input audio signal in dependence on frequency and for providing an equalized electric audio signal according to an equalization function, wherein the equalization function comprises:
- analyzing a characteristic of an input sample of the input audio signal relative to speech by applying two analysis filters in parallel to the input audio signal, and measuring an energy level of the output of each of the two filters, the two analysis filters having different frequency ranges, wherein one of the two analysis filters is a high pass filter with a cut-off frequency in the range of 1500 to 2500 Hz, and the other of the two analysis filters is a low pass filter with a cut-off frequency in the range of 400 to 600 Hz, and
- utilizing at least one actuator filter, which receives the input audio signal in parallel with the two analysis filters, to apply a frequency adjustment on the same input sample of the input audio signal whose characteristic is being analyzed by application of the two analysis filters to produce an equalized electric audio signal, the frequency adjustment being dependent on the analyzed characteristic, and
- a loudspeaker for providing an output signal perceivable by a user as sound representative of said equalized electric audio signal or a processed version thereof.
3 more elements
Dependencies are inferred from the claim text.