Half-duplex echo canceler training using a pilot signal
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United States of America Patent
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-
Oct 27, 1998
Grant Date -
N/A
app pub date -
Sep 29, 1995
filing date -
Sep 29, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A far-end modem transmits a 'pilot tone' during the time that a near-end modem is training its echo canceler. Correspondingly, the near-end modem is modified to notch, or filter, out this pilot tone from the received signal. The filtered received signal is then used by the near-end modem to train its echo canceler.
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Family
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Cited Art Landscape
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