Packet based echo cancellation and suppression

Details Packet based echo cancellation and suppression Packet based echo cancellation and suppression

2006-09-19

2010-12-14

Nguyen, Brian D (Department: 2472)

Multiplex communications

Duplex

Transmit/receive interaction control

C455S570000

Reexamination Certificate

active

07852792

ABSTRACT:
In a method for echo suppression or cancellation, a reference voice packet is selected from a plurality of reference voice packets based on at least one encoded voice parameter associated with each of the plurality of reference voice packets and the targeted voice packet. Echo in the targeted packet is suppressed or cancelled based on the selected reference voice packet.

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International Search Report and Written Opinion of the International Searching Authority (dated Jan. 30, 2008) for counterpart International application No. PCT/US2007/020162 is provided for the purposes of certification under 37 C.F.R. §§ 1.97(e) and 1.704(d).
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Beaugeant C. et al., “Gain loss control based on speech codec parameters,” Proceedings of the European Signal Processing Conference, Sep. 6, 2004, pp. 1-4. *Section 1,4*.

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