Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-12-01
1986-02-04
Martin, John C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358150, 358182, H04N 504
Patent
active
045689768
ABSTRACT:
Apparatus for synchronizing a first video signal corresponding to a first image and a second video signal corresponding to a second image, each of the first and second video signals including vertical and horizontal synchronizing signals, including a video camera which produces the first and second video signals and which generates vertical synchronizing signals for the first and second video signals in response to a negative-going edge of a pulse signal supplied thereto; a storage device which stores the first video signal produced by the video camera; a synchronizing signal generator which supplies vertical and horizontal synchronizing signals synchronized with the corresponding signals of the first video signal when the video camera is viewing the second image; and a monostable multivibrator connected between the vertical synchronizing signal terminals of the synchronizing signal generator and the video camera, and operative during viewing of the second image to produce and supply said negative-going edge of said pulse signal to the video camera in response to the trailing or positive-going edge of the vertical synchronizing signal from the synchronizing signal generator, the new negative-going edge being phase delayed from the positive-going edge of the vertical synchronizing signal which triggers the monostable multivibrator by slightly less than one field interval to control the camera to generate the vertical synchronizing signal for the second video signal in phase coincidence with the vertical synchronizing signal of the first video signal.
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Bobis Daniel H.
Jackson David A.
Martin John C.
Parker Michael D.
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