PCM transmission system

Details PCM transmission system PCM transmission system

1985-11-22

1988-07-19

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 26, 375 38, 329104, 332 11D, 358135, H04B 1406

Patent

active

047590386

ABSTRACT:
A PCM difference data is obtained from an original data, and an absolute data having a lower bit number than the original data is obtained at every data block, each data block comprising a plurality of the difference data. The transmission data includes the difference data and absolute data which is transmitted. The received data is separated into the difference data and the absolute data and the received difference data is integrated to provide the demodulated data. The integrated data is refreshed by the received absolute data only when the difference between the integrated data and absolute data is more than a predetermined value.

REFERENCES:
patent: 2516587 (1950-07-01), Peterson
patent: 3439753 (1969-04-01), Mounts et al.
patent: 3723909 (1973-03-01), Condon
patent: 4047151 (1977-09-01), Rydbeck et al.

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