Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks
US7221669B2 · kind B2 · utility
69Cited by
35References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.