Method and apparatus for inclusive echo canceller testing

Details Method and apparatus for inclusive echo canceller testing Method and apparatus for inclusive echo canceller testing

2008-04-15

2008-04-15

Kuntz, Curtis A (Department: 2614)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of hybrid or echo suppressor or canceller

Reexamination Certificate

active

07359489

ABSTRACT:
A testing and performance analysis methodology applies a series of test vector pairs to the input ports of an echo canceller under test. The test vector signal pair may represent a particular speech activity state transition, e.g., a Brady Model transition. A scoring compression function such as a sigmoid squashing function is used to evaluate quantized performance parameters. The sub-scores may be weighted and averaged to provide an overall performance score.

REFERENCES:
patent: 5412754 (1995-05-01), Le Cun et al.
patent: 5602836 (1997-02-01), Papadopoulos et al.
“Digital Network Echo Cancellers,” ITU-T Recommendation G.168, (Apr. 2000).

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