Method for talk/listen determination and multipoint conferencing

Details Method for talk/listen determination and multipoint conferencing Method for talk/listen determination and multipoint conferencing

1995-10-20

1998-06-16

Kizou, Hassan

Multiplex communications

Special services

Conferencing

379202, H04L 1216

Patent

active

057682631

ABSTRACT:
A method for determining a talk/listen state using a dynamic threshold is provided that can be implemented in a multipoint control unit (12). An audio sample is received and represents sound measured during a sample time interval. An audio level is generated from the audio sample The audio level represents an average power level of the audio sample. A dynamic threshold is set by processing the audio level. The audio level is compared to the dynamic threshold. A talk/listen state is determined to be a talking state if the audio level is above the dynamic threshold and to be a listening state if the audio level is below the dynamic threshold. The previous steps are repeated for each audio sample in a sequential stream of received audio samples such that the dynamic threshold is maintained and used to determine the talk/listen state.

REFERENCES:
patent: 4648108 (1987-03-01), Ellis et al.
patent: 4937856 (1990-06-01), Natarajan
patent: 5555017 (1996-09-01), Landante et al.
patent: 5563952 (1996-10-01), Mercer

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