High bandwidth sonic tone generation
US11189295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2017 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B11/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sonic signal encodes a symbol sequence representing a binary message, for delivery as audio content. The binary message into a sequence of symbols that are each associated with frequency characteristics transmitted over a time period. Two carriers are transmitted at two selected frequencies during each time period, delivering the binary data at a high rate. The symbol sequence is preceded by a prefix which takes the form of a sweeping frequency tone which sweeps over the frequency ranges of the carriers. Further, the amplitudes of the carriers are adjusted so that higher frequency transmissions are transmitted at higher sound pressure levels. Methods for synchronizing to the symbol sequence and decoding the symbol sequence are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.