Method and apparatus for acoustic echo cancellation in a...

Details Method and apparatus for acoustic echo cancellation in a... Method and apparatus for acoustic echo cancellation in a...

2003-01-21

2008-07-08

Yao, Kwang Bin (Department: 2616)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S268000, C370S269000, C370S328000

Reexamination Certificate

active

07397772

ABSTRACT:
A method and apparatus are disclosed for canceling acoustic echo generated during transmission of text information in a communication system supporting a TTY/TDD service. When a mobile-to-land call is established between a mobile subscriber and a PSTN subscriber, a decoder notifies an encoder of detection of TTY/TDD text in a BS vocoder. The encoder then transmits a packet having silence information, which prevents acoustic echo reproduction of the text in the TTY/TDD device.

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