Test signalling
US7978613B2 · kind B2 · utility
3Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jan 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/2236
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The degree of degradation imposed on signals transmitted over a communications link from a transmitter to a receiver is tested. A predetermined test signal is transmitted using spare capacity detected by a voice activity detector when no speech is to be transmitted over the communications link. The test signal received by the receiver is compared with the reference signal, and a measure of the degradation of signals caused by the communications link is generated therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.