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US 2017/0249931 A1Published application
Noise removal system
AssigneeSTMicroelectronics International N.V.
InventorsAnkur Bal, Anupam Jain, Rakhel Kumar Parida
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Abstract
A system for noise removal is coupled to a signal unit that provides a digital signal. The noise removal system includes a transformation module to transform the digital signal into an f-digital signal, a threshold filter to generate a noiseless signal from the f-digital signal based on a threshold profile, and a signal synthesizer to provide a gain to the noiseless signal and to transform the noiseless signal into an output signal.
Claims23
A system, comprising:
- a signal unit configured to generate a digital signal;
- and
- a noise removal system configured to receive the digital signal, the noise removal system comprising:
- a transformation module configured to transform the digital signal from a time domain signal to a frequency domain signal, the frequency domain signal being an f-digital signal;
- a signal optimizer configured to perform a phase correction on the f-digital signal to produce an optimized digital signal, the phase correction being based on a noise profile;
- a threshold filter configured to generate a noise-filtered digital signal from the optimized digital signal by removing a frequency bin having an amplitude less than an amplitude threshold, the noise-filtered digital signal comprising a dynamic headroom;
- and
- a signal synthesizer configured to process the noise-filtered digital signal to occupy the dynamic headroom.
5 more elements
A noise removal system, comprising:
- a transformation module configured to transform a digital signal into an f-digital signal in a frequency domain;
- a threshold filter configured to remove noise from the f-digital signal to generate a noise-filtered signal based on a threshold profile, wherein removing the noise leaves a dynamic headroom;
- a residue noise module configured to generate the threshold profile based on the f-digital signal and provide the threshold profile to the threshold filter;
- and
- a signal synthesizer configured to provide a gain to the noise-filtered signal for at least recovering the dynamic headroom, and transform the noise-filtered signal into an output signal.
2 more elements
A method comprising:
- transforming a digital signal to an f-digital signal;
- determining a noise threshold profile based on the f-digital signal;
- generating a noise-filtered signal, based on the noise threshold profile and a phase correction, from the f-digital signal, the noise-filtered signal comprising a dynamic headroom;
- recovering the dynamic headroom of the noise-filtered signal;
- and
- generating an analog output signal from the noise-filtered signal.
3 more elements
Dependencies are inferred from the claim text.