Encoding multiple messages in audio data and detecting same
US6845360B2 · kind B2 · utility
144Cited by
17References
144Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2002 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Sep 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/018
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for encoding and decoding multiple messages in audio data. The messages each comprise a sequence of message symbols each comprising a combination of substantially single-frequency components. At least some of the message symbols in one of the messages coexist with at least some of the symbols of another one of the messages along a time base of the audio data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.