Transparent lossless audio watermarking enhancement
US10811017B2 · kind B2 · utility
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7References
20Claims
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Key dates
| Filing date | Dec 22, 2016 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | May 3, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and devices are described for losslessly watermarking an audio signal by performing a noise shaped quantisation and clipping the output from the noise shaped quantisation to bounds computed by a pair of quantised linear functions with gradient 0.5 of the input to the noise shaped quantisation. Corresponding methods and devices are also described for inverting the process to recover an exact replica of the original audio signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.