Spectral wells for inserting watermarks in audio signals
US9311924B1 · kind B1 · utility
2Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2015 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Sep 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method to watermark an audio signal includes inserting a first symbol in a spectral well, the spectral well corresponding to at least one of a second spectral portion when amplitude of a first spectral portion and amplitude of a third spectral portion exceed amplitude of the second spectral portion, or the second temporal portion when amplitude of a first temporal portion and amplitude of a third temporal portion exceed amplitude of the second temporal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.