Inserting watermarks into audio signals that have speech-like properties
US9626977B2 · kind B2 · utility
4Cited by
34References
36Claims
0Family size
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Key dates
| Filing date | Apr 20, 2016 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Apr 20, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/0204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for a machine or group of machines to watermark an audio signal includes receiving an audio signal and a watermark signal including multiple symbols, and inserting at least some of the multiple symbols in multiple spectral channels of the audio signal, each spectral channel corresponding to a different frequency range. Optimization of the design incorporates minimizing the human auditory system perceiving the watermark channels by taking into account perceptual time-frequency masking, pattern detection of watermarking messages, the statistics of worst case program content such as speech, and speech-like programs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.