Method and system for sub-audible signaling
US9391727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2014 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Jul 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/423
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed are various embodiments for a system and method for encoding sub-audible codes within a signal. One exemplary embodiment includes a method that includes receiving a first digital code and a second digital code; receiving a first block and a second block of a signal; embedding an echo of the first block of the signal in the second block of the signal to create a first modified second block of the signal in accordance with the first digital code; modulating the power of the first modified second block of the signal to create a second modified second block of the signal in accordance with the second digital code; and sending a modified signal including the second modified second block of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.