Method and system for dynamically enhancing low frequency based on equal-loudness contour
US10511905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2017 |
| Grant date | Dec 17, 2019 |
| Priority date | — |
| Expiry date | Jul 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method comprises: collecting an input audio signal; performing frequency-division processing on the input audio signal, extracting a high-frequency signal and a low-frequency signal to transmit respectively, and reserving one path of original audio signal; performing dynamic gain processing on the low-frequency signal adopting an Automatic Gain Control (AGC) algorithm, and performing low-pass filtering enhancement processing on the original audio signal adopting a static low-frequency enhancement algorithm; and subjecting the high-frequency signal, the processed low-frequency signal and the processed original audio signal to weighted summation to obtain a final output audio signal, the weight coefficients of the high frequency signal, the processed low-frequency signal and the processed original audio signal being a, b and c respectively, where the values of a, b and c range from 0 to 1, and a+b+c=1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.