Remote control signaling using audio watermarks
US8791789B2 · kind B2 · utility
48Cited by
377References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2013 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | May 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B11/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for using a watermark embedded in an audio signal to remotely control a device. Various devices such as toys, computers, and appliances, equipped with an appropriate detector, detect the hidden signals, which can trigger an action, or change a state of the device. The watermarks can be used with a “time gate” device, where detection of the watermark opens a time interval within which a user is allowed to perform an action, such as pressing a button, typing in an answer, turning a key in a lock, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.