Apparatus for correcting time base fluctuations in digital signa

Details Apparatus for correcting time base fluctuations in digital signa Apparatus for correcting time base fluctuations in digital signa

1990-01-17

1992-03-03

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 362, H04N 595

Patent

active

050937324

ABSTRACT:
Time base error correction apparatus for correcting time base fluctuations in input digital signals containing block sync signals includes a clock generator for generating clock signals from the input digital signals that contain the same time base fluctuations. A first FIFO memory for writing and reading out the input digital signals on the basis of the generated clock signals and on the basis of reference clock signals, respectively, corrects the clock phase, and a second FIFO memory controlled during writing on the basis of the block sync signal separated from the output of the first FIFO memory and controlled during readout on the basis of a reference block sync signal corrects phase errors of the block sync signal.

REFERENCES:
patent: 4141039 (1979-02-01), Yamamoto
patent: 4769720 (1988-09-01), Heitmann

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