Voice activity detection based on far-end and near-end...

Details Voice activity detection based on far-end and near-end... Voice activity detection based on far-end and near-end...

2007-08-28

2007-08-28

Vu, Huy D. (Department: 2616)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S287000, C370S288000, C704S233000

Reexamination Certificate

active

10076991

ABSTRACT:
Methods and apparatus of managing a communication system, wherein a decision regarding a level of activity at a first end is made based at least in part on the level of activity at the second end. In one embodiment, the energy level of a first-end audio signal is measured. The first end is declared voice-active if the first-end energy level is greater than or equal to a first threshold value. The first end is declared voice-inactive if the first-end energy level is less than the first threshold value. To determine the value of the first threshold value, the energy level of a second-end audio signal is measured. If the second-end energy level is greater than or equal to a second threshold value, the second end is declared voice-active, in which case the first threshold is maintained at a relatively high level. If the second-end energy level is less than the second threshold value, the second end is declared voice-inactive, in which case the first threshold is maintained at a relatively lower level.

REFERENCES:
patent: 5307405 (1994-04-01), Sih
patent: 5619566 (1997-04-01), Fogel et al.
patent: 5920834 (1999-07-01), Sih et al.
patent: 6792107 (2004-09-01), Tucker et al.
patent: 6912209 (2005-06-01), Thi et al.
patent: 0817398 (1998-01-01), None
patent: WO-01/22710 (2001-03-01), None

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