Half duplex device and signal processing method thereof

Details Half duplex device and signal processing method thereof Half duplex device and signal processing method thereof

2006-08-22

2006-08-22

Tsang, Fan (Department: 2614)

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

C379S388050, C379S395010, C379S390020

Reexamination Certificate

active

07095846

ABSTRACT:
A half duplex device and signal processing method thereof. First, a signal detection unit of a signal detector of a half duplex device obtains a short-term power and long-term power. Next, a data update unit of the signal detector sets a short-term power threshold as a default threshold, determines whether the long-term power is greater than the default threshold, sets the short-term power threshold value equal to the long-term power value if the long-term power value is greater than the default threshold value, and provides smooth performance in a noisy environment.

REFERENCES:
patent: 5699424 (1997-12-01), Hirano
patent: 5737407 (1998-04-01), Graumann
patent: 5764753 (1998-06-01), McCaslin et al.
patent: 6141415 (2000-10-01), Rao
patent: 6198819 (2001-03-01), Farrell et al.
patent: 2003/0220786 (2003-11-01), Chandran et al.

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