Method and apparatus for echo data hiding in audio signals
US5893067A · kind A · utility
224Cited by
6References
61Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1996 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | May 31, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K1/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of hiding information in a host audio signal introduces one or more echoes into the signal. The separation in time between the host signal and an echo is associated with the value of a datum embedded in the signal. The identity of the embedded datum is determined by observing the delay between the host signal and the echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.