Dynamic balance control for telephone

Details Dynamic balance control for telephone Dynamic balance control for telephone

2006-01-24

2006-01-24

Harold, Jefferey F. (Department: 2646)

Telephonic communications

Echo cancellation or suppression

Disable or inhibit function

C379S406080, C381S071100

Reexamination Certificate

active

06990194

ABSTRACT:
A telephone includes a transmit channel and a receive channel, each including a bank of sub-band filters having a VAD coupled one to each sub-band filter. Each VAD measures the spectral energy in a sub-band, compares the spectral energy to a first threshold, and produces an output signal representative of whether or not the first threshold is exceeded. The voice activity detector also includes a threshold circuit for calculating a dynamically adjustable noise threshold based upon averaged measured spectral energy. A wide band or system VAD monitors echo canceling circuitry to detect voice activity and double talk. A dynamic balance control circuit maintains the transmit and receive channels in a predetermined energy ratio during double talk.

REFERENCES:
patent: 6442275 (2002-08-01), Diethorn

Affiliated with

Also associated with

Rating

Dynamic balance control for telephone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic balance control for telephone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic balance control for telephone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3553272