Integrating digital data with perceptible signals
US6389055B1 · kind B1 · utility
328Cited by
15References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for combining digital data with a perceptible program signal. The data stream is modulated onto an electromagnetic signal encoding the perceptible signal; the modulating employs a spread spectrum encoding of the data stream. The modulated program signal is transduced into perceptible form. A capture device receives the perceptible signal, and a decoder extracts the spread spectrum encoded data from the received signal. The method is particularly useful in encoding purchase information or watermarking information into the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.