The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1982
Filed:
Apr. 30, 1980
Elliot L Gruenberg, West New York, NJ (US);
BroadCom, Incorporated, West New York, NJ (US);
Abstract
A digital multiplexer accommodates a large number of voice channels per digital channel through use of an improved statistical coding technique. Analog information on the voice channels is encoded into multibit digital words by PCM encoders and the bit position at the output of each PCM encoder is staggered such that a predetermined bit in each word is presented at different times to encoder outputs. The multibit digital words are converted to multibit digital code words and the code words are in turn converted into a PAM signal for transmission over a communications highway. Bit staggering advantageously allows the use of a minimum number of PAM signal levels in comparison to prior art techniques. An executive conferencing arrangement is also provided wherein PCM encoder outputs from a plurality of communications channels are multiplied by predetermined analog voltages, the analog voltages are summed from each channel and the sum is subtracted from a fixed analog voltage whose value is dependent on the number of communications channels. The difference signal is utilized to set up a conferencing arrangement wherein each communications channel carrying analog information is connected to each communications channel not carrying analog information.