Messaging by writing an image into a spectrogram
US9406305B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Aug 2, 2016 |
| Priority date | — |
| Expiry date | Apr 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/3829
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A message is communicated between devices by passing a host signal, such as an audio signal, with the message written into the spectrogram of the host signal. For host audio signals, the message is authored, converted to an image format (if not already in suitable image form) and written into the spectrogram of the audio signal. The resulting audio signal can be communicated in a variety of ways, but in one particular embodiment, the audio signal is played from a speaker (e.g., of a sending mobile device) and captured through the microphone of a receiving device. The spectrogram of the received audio signal is computed and then rendered to a display screen (e.g., the display of a receiving mobile device).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.