Method and apparatus for minimizing far-end speech effects in hands-free telephony systems using acoustic beamforming
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United States of America Patent
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Issued Date -
Apr 11, 2002
app pub date -
Oct 3, 2001
filing date -
Oct 6, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A far-end activity detector for use in a hands-free telephone incorporating a beamformer, comprising a pair of accumulators for storing respective samples of a near-end signal and a far-end signal received by the hands-free telephone, a pair of modules for calculating the acoustic energies of the respective samples of the near-end signal and the far-end signal, and a comparator for comparing the acoustic energies and in the event the far-end acoustic energy exceeds the near-end acoustic energy by more than said predetermined amount then freezing operation of the steering functionality of the beamformer.
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