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US 11,380,346 B2Granted
Signal processing system and a method of determining noise reduction and compensation thereof
AssigneeWistron Corporation
InventorsChing-An Cho, Yu-Yen Chen, Kuo-Ting Huang
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Abstract
A method of determining noise reduction in a signal includes transforming the signal to generate a spectrogram; determining sharp change in a frequency spectrum for each frame in the spectrogram; and comparing a counted number of frames having sharp change with a predetermined value. The signal is determined to be subject to noise reduction if the counted number is greater than the predetermined value.
Claims13
A method of determining noise reduction in a signal, comprising:
- (a) transforming the signal to generate a spectrogram by a signal processor;
- (b) determining sharp change in a frequency spectrum for each frame in the spectrogram;
- and
- (c) comparing a counted number of frames having sharp change with a predetermined value;
- wherein the signal is determined as having been subject to noise reduction if the counted number is greater than the predetermined value and
- (d) adding a noise signal to the signal with noise reduction, thereby obtaining a compensated signal.
3 more elements
A signal processing system, comprising:
- a transducer that transforms physical quantity to a signal;
- a signal processor performing the following steps:
- (a) transforming the signal to generate a spectrogram;
- (b) determining sharp change in a frequency spectrum for each frame in the spectrogram;
- and
- (c) comparing a counted number of frames having sharp change with a predetermined value, the signal being determined as having been subject to noise reduction if the counted number is greater than the predetermined value;
- a noise source that provides a noise signal;
- and
- a synthesizer that adds the noise signal and the signal with noise reduction, thereby obtaining a compensated signal.
6 more elements
Dependencies are inferred from the claim text.