Audio watermark encoding with reversing polarity and pairwise embedding
US9305559B2 · kind B2 · utility
36Cited by
25References
20Claims
0Family size
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Key dates
| Filing date | Oct 15, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | May 23, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Audio watermark encoding methods employ reversing polarity and pairwise embedding. A watermark signal is generated, mapped to pairs of embedding locations and inserted in the members of the pair with reverse polarity. The pairs of embedding locations correspond to adjacent regions or frames in time or frequency domains. A method for controlling an audio output device captures audio from the device, extracts its identity from a watermark, and modifies the operation of the device, e.g. varying watermark strength or audio loudness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.