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US 2022/0068291 A1Published application
Audio processing method for performing audio pass-through and related apparatus
AssigneeRealtek Semiconductor Corp.
InventorWei-Hung He
Life of this patent
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Abstract
An audio processing method includes: converting a time-domain audio signal into a frequency-domain audio signal; determining a noise reduction gain according to the frequency-domain audio signal; and selecting at least one set of time-domain filter coefficients from a plurality sets of time-domain filter coefficients according to the noise reduction gain; configuring a time-domain filter according to the at least one selected set of time-domain filter coefficients, and filtering the time-domain audio signal with the time-domain filter.
Claims14
An audio processing method, comprising:
- converting a time-domain audio signal into a frequency-domain audio signal;
- determining a noise reduction gain according to the frequency-domain audio signal;
- selecting at least one set of time-domain filter coefficients from a plurality sets of predetermined time-domain filter coefficients according to the noise reduction gain;
- and
- configuring a time-domain filter according to the at least one selected set of time-domain filter coefficients, and filtering the time-domain audio signal with the time-domain filter.
2 more elements
An audio processing apparatus, comprising:
- a Fourier transform unit, arranged to convert a time-domain audio signal into a frequency-domain audio signal;
- a noise analysis unit, coupled to the Fourier transform unit, arranged to determine a noise reduction gain according to the frequency-domain audio signal;
- a filter coefficient storage unit, arranged to store a plurality set of predetermined time-domain filter coefficients;
- a filter coefficient selection unit, coupled to the noise analysis unit and the filter coefficient storage unit, arranged to select at least one set of time-domain filter coefficients from the plurality sets of predetermined time-domain filter coefficients according to the noise reduction gain;
- and
- a time-domain filter, coupled to the filter coefficient selection unit, controllable by the at least one selected set of time-domain filter coefficients, and arranged to filter the time-domain audio signal.
3 more elements
Dependencies are inferred from the claim text.