Transversal filter echo canceller
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United States of America Patent
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-
Jan 28, 1992
Grant Date -
N/A
app pub date -
Apr 10, 1990
filing date -
Apr 10, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transversal filter apparatus having a shift register, an averaging circuit for averaging data stored in sequential shift registers, and a multiplier for multiplying the averaged data. Additionally, a method and apparatus for echo cancelling a transhybrid response having a well behaved portion by using a transversal filter based echo canceller wherein the data stored in adjacent registers of the shift register which correspond to the well behaved portion of the transhybrid response are averaged together prior to being applied to a multiplier. This apparatus and method makes possible a reduction in the amount of hardware required to achieve a given level of echo cancellation.
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