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
Method of monitoring and configuring
System and method for creating a build set and bill of materials from a master source model
Methods and apparatus for map detection with reduced complexity
Group greeting card
Statistical information collection from one or more device(s) in storage communication with a computing platform
Systems and methods for implementing pressure sensitive keyboards
Memory device and method for repairing a semiconductor memory
  Randomly Featured Patents
Optically transmissive microembossed receptor media
Ultra precision process carrier for semi-conductor manufacturing
Automate fluid flow control system
Methods of modulating immunity
Intraocular lens derivation system
Lithium battery with secondary battery separator
Remote control lock device
Out of band location information retrieval
Data input device of semiconductor memory appartus and control method thereof