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Title: Echo canceller
Authors: Yiu, Ka-fai Cedric
Huo, Jiaquan
Teo, Kok Lay
Subjects: Echo canceller
Issue Date: 20-Sep-2005
Source: US Patent 6,947,549 B2. Washington, DC: US Patent and Trademark Office, 2005.
Abstract: An echo canceller includes two parallel filters and a controller. The controller chooses the best of the two filters for the final echo cancellation. The filter coefficients are exchanged between the two filters constantly so that both filters retain performance all the time even if double-talk and echo path variations occur very closely in time. One filter is strongly robust and will not diverge during double-talk, and another filter is weakly robust and will converge rapidly during echo path variation.
Rights: Assignee: The Hong Kong Polytechnic University.
Type: Patent
Appears in Collections:Patents of PolyU
AMA Patents

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