Method for dynamically adjusting the spectral content of an audio signal
US7899192B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 20, 2007 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Dec 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R5/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for dynamically adjusting the spectral content of an audio signal, which increases the harmonic content of said audio signal, said method comprising translating an encoded digital signal into data bands, creating a psychoacoustic model to identify sections of said data bands that are deficient in harmonic quality, analyzing the fundamental frequency and amplitude of said harmonically deficient data bands, creating additional higher order harmonics for said harmonically deficient data bands, adding said higher order harmonics back to said encoded digital signal to form a newly enhanced signal, inverse filtering said newly enhanced signal, and converting said inverse filtered signal to an analog waveform for consumption by the listener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.