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
Brushless electric motor or generator in shell construction
Liquid low temperature injection molding process
System and method for stranded file opens during disk compression utility requests
Isoselective polymerization of epoxides
Verbena plant named `Duempsopicha`
Communication apparatus, and method and program for controlling same
Electronic component, a semiconductor wafer and a method for producing an electronic component
  Randomly Featured Patents
Thermoplastic composition containing a poly(methyl ethenyl benzene) resin and a poly(phenylene oxide) resin
Diamond pendant
Water filter
Noise suppressing circuit in an FM tuner
Method for the production of friction plates, synchronizing blocker rings or similar structures
Modular ozone distributing system
Packaging material for photographic photosensitive materials
Reverse channel next cancellation for MDSL modem pool
Method and device for measuring phase jitter on a transmission channel
Calenderable thermoplastic compositions containing millable linear polyurethanes