Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1976-10-22
1978-12-05
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358905, 325476, 307262, H04N 514, H04B 110, H03K 112
Patent
active
041288483
ABSTRACT:
An automatic ghost-suppression system having an adder, a variable delay device, and a polarity and gain control device. The variable delay device is connected with the adder through the polarity and gain control device. A video signal is simultaneously applied to both the adder and the variable delay device, and added in the adder to the video signal which is delayed by the variable delay device and then preferably adjusted in its polarity and amplitude by the polarity and gain control device. On the other hand, a synchronizing signal is separated from the delayed video signal and used for generation of a gate signal for detecting a residual ghost during a vertical blanking period. From the video signal produced at the output of the adder, the residual ghost contained in the vertical blanking period is detected by the gate signal and used as a control signal for controlling the polarity and gain control device thereby to automatically suppress the ghost.
REFERENCES:
patent: 2236134 (1941-03-01), Gloess
patent: 3521177 (1970-07-01), Niet
patent: 3935536 (1976-01-01), Kimura et al.
patent: 3988775 (1976-10-01), Nakagawa et al.
patent: 4012643 (1977-03-01), Miura
patent: 4013834 (1977-03-01), Kino et al.
patent: 4047224 (1977-09-01), Yamaguti
patent: 4053932 (1977-10-01), Yamaguti et al.
Griffin Robert L.
Hitachi , Ltd.
Psitos Aristotelis M.
LandOfFree
Automatic ghost-suppression system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic ghost-suppression system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic ghost-suppression system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-289198