Dynamic threshold systems, computer readable medium, and program code for filtering noise and restoring attenuated high-frequency components of acoustic signals
US9696444B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2014 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Sep 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02163
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems, computer readable media, and program code to provide for filtering noise and/or restoring attenuated spectral components in acoustic signals, are provided. An exemplary embodiment of a system is configured for dynamically filtering each of a plurality of raw FFT data samples of a record to remove or attenuate background noise contained therein to thereby produce a corresponding plurality of cleaned FFT data samples. The sample-specific background noise is removed or attenuated by a record-specific dynamic filter to produce the corresponding cleaned FFT data samples. The system can also perform the operations of restoring the attenuated high-frequency components of the cleaned data samples through application of a record-specific Restoring Processor at least partially defined by a portion of the cleaned data samples and a Gain Function to thereby produce cleaned and restored data samples, and applying an inverse transformation to convert the cleaned and restored data samples into cleaned and restored data samples in time domain data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.