Apparatus and method for the enhancement of signals
The present invention relates to signal processing, and more particularly, to the processing of signals in the presence of noise. A signal processing unit is disclosed for selectively routing an unfiltered input signal and a noise reduced version of the unfiltered input signal to an output port in r...
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| Format | Patent |
| Language | English |
| Published |
11.02.2003
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| Online Access | Get full text |
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| Summary: | The present invention relates to signal processing, and more particularly, to the processing of signals in the presence of noise.
A signal processing unit is disclosed for selectively routing an unfiltered input signal and a noise reduced version of the unfiltered input signal to an output port in response to a noise power estimate. Routing the unfiltered input signal to the output port when the noise power estimate is less than a noise floor threshold avoids degrading the information content of an input signal having a power level close to the noise floor. A first attenuation factor and a second attenuation factor can be applied to the unfiltered input signal. A method is disclosed for parsing a signal into a plurality of frames, selecting a maximum value for each frame, and averaging the maximum values to form a noise floor threshold. |
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