Time division multiplexing method with channel compression and a

Multiplex communications – Wide area network – Packet switching

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370112, H04J 317, H04J 312

Patent

active

049339346

ABSTRACT:
In a time division multiplexing method or device wherein first through N-th-channel samples are extracted at first through M-th unit intervals which correspond to first through M-th bit rates of first through N-th-channel input signals, where M is equal to or less than N, a control signal is produced in response to the input signals to indicate first through M-th consecutive fields in each of successive frames of a time division multiplexed signal and to indicate whether the samples are significant or insignificant samples in each frame. The first through the M-th fields correspond to the unit intervals and have a predetermined total time duration in each frame. The control signal is used moreover to arrange the samples in the fields of each frame by selecting the significant samples with preference to the insignificant samples. Together with the control signal, a sample arrangement information signal is produced to indicate arrangement of the samples in each frame and is arranged in an information field which remains in each frame. Depending on the number of the samples arranged in each field with the unit interval corresponding to the field under consideration, time durations of the fields may vary from frame to frame.

REFERENCES:
patent: 3982077 (1976-09-01), Clark et al.
patent: 4271508 (1981-06-01), Schenk
patent: 4377861 (1983-03-01), Huffman
patent: 4589108 (1986-05-01), Billy
patent: 4719624 (1988-01-01), Bellisio

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