Digital transmission system

Multiplex communications – Wide area network – Packet switching

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Details

370111, 370109, H04J 306, H04J 312

Patent

active

045204802

ABSTRACT:
A digital transmission system employing nBmB codes in which provision is made for insertion of service and auxiliary data bits. The transmitter of the transmission system includes a series to parallel converter, register file, pulse insertion circuit, nBmB encoder and parallel to series converter. The bit rate of the parallel n bit code streams is converted to produce an additional time slot after each occurrence of a predetermined number of data bits. Service and auxiliary data bits are inserted in the additional time slots. The receiver portion of the transmission system includes a series to parallel converter, followed by an nBmB decoder, a pulse separator, a register file and a parallel to series converter. At the receiver, the mB code is converted back to an nB code from which the service and auxiliary data bits are extracted and subsequently removed.

REFERENCES:
patent: 3995119 (1976-10-01), Pachynski, Jr.
patent: 3995120 (1976-10-01), Pachynski, Jr.
patent: 4151373 (1979-04-01), Widmer et al.
patent: 4157458 (1979-06-01), Roche
patent: 4330856 (1982-05-01), Takasaki et al.
patent: 4345323 (1982-08-01), Chang
patent: 4359770 (1982-11-01), Suzuka
"A 140 Mbit/s Optical Transmission System with 8 km Repeater Spacing and Line Section Length of 96 km," K. Mouthaan et al., Philips' Telecommunicatie Industrie.
"Binary Line Codes for Digital Transmission on Optical Fibers," Optical Communication Conference, Amsterdam, Sep. 17-19, 1979.

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