Resources Contact Us Home
Automatic gain control using root-mean-square circuitry in a digital domain conference bridge for a telephone network

Image Number 6 for United States Patent #5029162.

An automatic gain control for an inputted multiplex PCM data stream in a conferencing bridge in a telephone system. The inputted multiplexed data stream has a predetermined number of time slots wherein each time slot carries PCM speech data corresponding to an individual party in the conference call. The control of the present invention is capable of operating in .mu.-Law or A-Law companded format at a frequency of 192-256 kilobytes per second. The automatic gain control incorporates a digital root-mean-square meter, a COUNT sequence to change GAIN at predetermined intervals, and a set of GAIN rules to selectively increase or decrease GAIN based upon the output of the digital root-mean-square meter.

  Recently Added Patents
Lower set insert with a lower ball seat for a downhole plug
JTAG multiplexer with clock/mode input, mode/clock input, and clock output
Dynamic web page construction based on determination of client device location
Resin composition and display device using the same
Mobile interactive kiosk method
Hand sign
Pharmaceutical powder compositions
  Randomly Featured Patents
Gas-releasing composition for tailoring gas evolution of system IR 2811
Multi-core brush seal assembly for rotary machines
Method and apparatus for controlling opening and closing speed of dispensing gun valve mechanism
Bonding process and bonded structures
Heat-dissipating mechanism for a motor
Electronic component mounting apparatus and electronic component mounting method
Vehicle tilt seat handle coupling
Computer display device and method of operation
Inbred corn line MM6
Fractional destructive distillation array