Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-09-21
1992-09-01
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358153, H04N 508, H04N 510
Patent
active
051444330
ABSTRACT:
A signal detector circuit arrangement for detecting synchronizing pulses contained in a digital television signal by the use of a separating stage wherein, during the time intervals in which television signal portions are separated in the separating stage and at the same time an instantaneous sampling value exceeds a stored sampling value in the direction of the level of the synchronizing pulses, the stored sampling value is replaced by the instantaneous sampling value and simultaneously a marker pulse is generated. In each time interval between consecutive synchronizing pulses, the stored sampling value is erased at a presettable instant which is identical for all the time intervals. The final marker pulse of such an erasing procedure marks a detected synchronizing pulse.
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patent: 4821098 (1989-04-01), Smeulers
Lenth Ju
Pletz-Kirsch Gerhard
Franzblau Bernard
Groody James J.
Metjahic Safet
U.S. Philips Corporation
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