Performance testing of echo cancellers using a white noise test signal
US8208622B2 · kind B2 · utility
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4References
26Claims
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Key dates
| Filing date | Oct 21, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Oct 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/493
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Testing equipment for and a method of performance testing an echo canceller are disclosed. The method includes generating a white noise test signal that includes a plurality of high-level white noise time segments, each of which is separated by a low-level white noise time gap. The generated white noise test signal is transmitted to the echo canceller. At least one echo output signal is received from the echo canceller, and the echo output signal results from the white noise test signal. The level and duration of the received at least one echo output signal are measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.