Method for spread spectrum communication of supplemental information
US6765950B1 · kind B1 · utility
12Cited by
22References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1999 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Apr 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for the communication and recovery of supplementary data encoded in the primary information transmitted from a source to a receiver for both audio and television transmissions. The method includes modulating a carrier signal with the supplementary data using a spread spectrum approach and demodulating the carrier signal to recover the embedded supplementary data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.