Title:
ECHO CONTROL OPTIMIZATION
Document Type and Number:
WIPO Patent Application WO/2012/044462
Kind Code:
A8
Abstract:
In one implementation, a conference hosted on a conference bridge that includes an echo control device that classifies the echo return loss of a plurality of endpoints. The endpoints may include endpoints on internet protocol (IP) networks and public switched telephone networks (PSTN). The echo control of the endpoints is controlled independently. An echo classification module calculates the echo return loss value of the associated echo tail of the endpoint and chooses an appropriate echo control mode. If the echo return loss is above a high threshold, a pass through mode is activated. If the echo return loss is below a low threshold, a full echo cancellation mode is activated. If the echo return loss is between the low threshold and the high threshold, an echo suppression mode is activated.
Inventors:
RAMALINGAM THIYAGESAN (US)
PANDYA BHARGAV G (US)
SKRABUTENAS GARY A (US)
PANDYA BHARGAV G (US)
SKRABUTENAS GARY A (US)
Application Number:
PCT/US2011/051692
Publication Date:
February 28, 2013
Filing Date:
September 15, 2011
Export Citation:
Assignee:
CISCO TECH INC (US)
RAMALINGAM THIYAGESAN (US)
PANDYA BHARGAV G (US)
SKRABUTENAS GARY A (US)
RAMALINGAM THIYAGESAN (US)
PANDYA BHARGAV G (US)
SKRABUTENAS GARY A (US)
International Classes:
H04M9/08; H04B3/23
Attorney, Agent or Firm:
GLEITZ, Ryan, M. (P.O.Box 10087Chicago, IL, US)
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