Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-07-30
1993-03-02
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358320, 358337, 358319, 358148, H04N 576
Patent
active
051914344
ABSTRACT:
In a video recording/reproducing apparatus, scattered synchronizing signals included in video signals are restored by a synchronizing signal restoration circuit. The circuit includes an input terminal for receiving video signals, a synchronizing signal separator for separating the synchronizing signal from the video signals, a standard clock pulse generator for generating a standard clock pulse train with a period much shorter than those of the separated synchronizing signal, an even/odd field detector for detecting whether the video signal is of an even or an odd field according to the separated synchronizing signals and the standard clock pulse generator, a synchronizing pattern generator for responding to the detected results of the even/odd field detector and the standard clock pulse train to generate synchronizing patterns data conforming to the respective fields, a composite synchronizing signal generator for generating composite synchronizing signals by differently dividing the frequency of the standard clock pulse train corresponding to the value of the synchronizing pattern data, and an adder for adding the composite synchronizing signal generated by the composite synchronizing signal generated by composite synchronizing signal generator to the video signal.
REFERENCES:
patent: 3005869 (1961-10-01), Dolsy
patent: 4792853 (1988-12-01), Yamazishi et al.
patent: 4933774 (1990-06-01), Ishimaru
patent: 5057928 (1991-10-01), Nagashima
Bushnell Robert E.
Chevalier Robert
Chin Tommy P.
Samsung Electronics Co,. Ltd.
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