Adaptive loudness levelling method for digital audio signals in frequency domain
US9647624B2 · kind B2 · utility
2Cited by
2References
28Claims
0Family size
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Key dates
| Filing date | Dec 31, 2014 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Mar 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Embodiments of the present disclosure are directed to techniques for adjusting the amplitude of a digital audio signal in the frequency domain to control the perceived loudness of the audio signal at a desired level. In one embodiment, a method first adjusts the audio signal to a desired loudness level by applying an adaptive wideband gain and thereafter a multi-band compression is applied to further reduce a dynamic range of the audio signal, and noise analysis and temporal masking operations are also performed to provide a pleasant sound for a listener or listeners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.